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The files in ZVDateControls package are under the modified LGPL,
same as the FPC RTL and the Lazarus LCL.
Copyright (C) Zoran Vučenović, http://wiki.lazarus.freepascal.org/User:Zoran
These files are distributed under the Library GNU General Public License
(see the file COPYING.LGPL) with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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exception statement from your version.
The ZVDateControls package is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

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===================================================
Version 1.0 -- 27. Feb. 2010.
Initial release
===================================================
Version 1.1 -- 18. April 2010.
The Data aware control's (DBZVDateTimePicker's) interacting with DataSource is slightly improved.
There are also several fixes, these are some of them. The first three fixes apply to DBZVDateTimePicker control only, the fourth, fifth and sixth apply to both controls.
1. In runtime changing date/time in DBZVDateTimePicker was possible when not connected to database.
When not connected to specific DB field, or when the Database connection is not active, now the control can only have NULL value, which is appropriate behaviour for a DB control.
2. The Time property was accidentaly published in DBZVDateTimePicker. Time property, as well as Date, cannot be used directly in DBZVDateTimePicker, it is tied to underlying DB field.
The Time property is removed from published section of TDBZVDateTimePicker.
3. The DBZVDateTimePicker's properties MaxDate and MinDate were displayed as real numbers in Object inspector.
They are now displayed as dates.
4. The Hint property didn't work -- the hint didn't appear.
Now the Hint is shown when mouse pointer is over the control, of course only if ShowHint is set to True.
5. When calendar button is shown and AutoSize is False and the width is less than Text's width + SpeedButton's width, then the button gets hidden behind the text.
Now, the button is shown in front of the text, which is more appropriate behaviour.
6. When UpDown is shown and AutoSize is False, if Heigth is set to more than it would be if AutoSized, then, setting AutoSize to True would not trigger shirnking the control's Height as it should.
Fixed, now it does.
===================================================
Version 1.2 -- 12. May 2010.
Because of changes in LCL, some changes in code were needed, so that controls can compile with new Lazarus from svn trunk (since revision 25204).
===================================================
Version 1.3 -- 1. April 2011.
The changes of LCL, made after separating the 0.9.30 branch from the trunk, caused the crash of the control in new Lazarus 0.9.31 from trunk (see: http://wiki.freepascal.org/Lazarus_0.99.0_release_notes#Changes_affecting_compatibility), internal using of constructor TForm.Create had to be replaced by TForm.CreateNew (it was used twice -- for the drop-down form which carries the calendar and for design-time component editor form).
There are also internal changes which improved autosizing of the control.
The code is much simplified and the control is lighter now (there used to be an auxiliary control which is removed now and its code is simplified and unified in the main control).
===================================================
Version 1.4 -- 5. September 2012.
These are main changes:
The ZVDateTimeControls package is now in subversion control.
Added an event to interact with CheckBox -- OnCheckBoxChange (by Daniel S. Almeida).
OnChange event was triggered whenever date/time values change. Now it reacts only on changes made by user interaction, not when the changes are made programatically. The new behaviour is compatible with OnChange event of VCL's TDateTimePicker.
In Linux, locale-dependent properties were not initialized to correct defaults. Fixed now.
In Qt ws, the client rect of the control was not calculated correctly. Fixed now.
Plus many internal changes...

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8">
<TITLE></TITLE>
<META NAME="GENERATOR" CONTENT="LibreOffice 3.5 (Linux)">
<META NAME="AUTHOR" CONTENT="Zoran Vučenović">
<META NAME="CREATED" CONTENT="20100120;12052000">
<META NAME="CHANGED" CONTENT="20120904;23372000">
<STYLE TYPE="text/css">
<!--
@page { margin: 2cm }
P { margin-bottom: 0.21cm }
H4.cjk { font-family: "WenQuanYi Micro Hei" }
H4.ctl { font-family: "Mangal" }
A.cjk:link { so-language: zxx }
A.ctl:link { so-language: zxx }
-->
</STYLE>
</HEAD>
<BODY LANG="en-US" DIR="LTR">
<P ALIGN=CENTER STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><FONT SIZE=4 STYLE="font-size: 16pt"><B>ZVDateTimeControls
Package for Lazarus</B></FONT></FONT></P>
<P ALIGN=CENTER STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P ALIGN=CENTER STYLE="margin-bottom: 0cm"><A CLASS="western" HREF="http://wiki.lazarus.freepascal.org/ZVDateTimeControls_Package"><FONT FACE="Arial, sans-serif"><FONT SIZE=3><SPAN LANG="en-US"><SPAN STYLE="font-weight: normal">http://wiki.lazarus.freepascal.org/ZVDateTimeControls_Package</SPAN></SPAN></FONT></FONT></A></P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><BR>
</P>
<P ALIGN=CENTER STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm; font-weight: normal"><FONT FACE="Arial, sans-serif"><FONT SIZE=4>The
ZVDateTimeControls package contains two controls:</FONT></FONT></P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><BR>
</P>
<P ALIGN=LEFT STYLE="margin-left: 2cm; margin-bottom: 0cm"><IMG SRC="pictures/TZVDateTimePicker.png" NAME="grafika2" ALIGN=BOTTOM WIDTH=24 HEIGHT=24 BORDER=0><A CLASS="western" HREF="#TZVDateTimePicker">
</A><A CLASS="western" HREF="#TZVDateTimePicker"><FONT FACE="Arial, sans-serif"><FONT SIZE=3><SPAN LANG="en-US"><SPAN STYLE="font-weight: normal">TZVDateTimePicker</SPAN></SPAN></FONT></FONT></A></P>
<P ALIGN=LEFT STYLE="margin-left: 2cm; margin-bottom: 0cm"><BR>
</P>
<P ALIGN=LEFT STYLE="margin-left: 2cm; margin-bottom: 0cm"><IMG SRC="pictures/TDBZVDateTimePicker.png" NAME="grafika5" ALIGN=BOTTOM WIDTH=24 HEIGHT=24 BORDER=0><A CLASS="western" HREF="#TDBZVDateTimePicker">
</A><A CLASS="western" HREF="#TDBZVDateTimePicker"><FONT FACE="Arial, sans-serif"><FONT SIZE=3><SPAN LANG="en-US"><SPAN STYLE="font-weight: normal">TDBZVDateTimePicker</SPAN></SPAN></FONT></FONT></A></P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><BR>
</P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Author</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><A CLASS="western" HREF="http://wiki.lazarus.freepascal.org/User:Zoran"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US"><SPAN STYLE="font-weight: normal">Zoran
Vučenović</SPAN></SPAN></FONT></A></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>License</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Modified LGPL, same as Lazarus
component library.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Introduction</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">Delphi's
VCL has <A CLASS="western" HREF="http://docwiki.embarcadero.com/VCL/en/ComCtrls.TDateTimePicker">a
control named TDateTimePicker</A>, which I find very useful for
editing dates. LCL, however, does not have this control. Instead, for
editing dates <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/lcl/editbtn/tdateedit.html">LCL
has a control named TDateEdit</A>, but I prefer the VCL's
TDateTimePicker.</SPAN></FONT></P>
<P ALIGN=LEFT STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Therefore,
I tried to create a cross-platform Lazarus control which would
resemble VCL's TDateTimePicker as much as possible.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">The
TZVDateTimePicker control does not use <A CLASS="western" HREF="http://msdn.microsoft.com/en-us/library/system.windows.forms.datetimepicker.aspx">native
Win control</A>. It descends from LCL's TCustomControl to be
cross-platform. It has been tested on Windows with win32/64 and qt
widgetsets, as well as on Linux with qt and gtk2 widgetsets.</SPAN></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Note
that the TZVDateTimePicker control does not descend from TEdit, so it
does not have unnecessary caret. The VCL's control doesn't have caret
either.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Installation</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">To
install the package in Lazarus IDE follow these steps:</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<OL>
<OL>
<LI><P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Open
the package in Package Editor (in Lazarus' main menu click <I>Package</I>,
then <I>Open package file...</I> locate the file
zv<I>datetimectrls.lpk</I> and click <I>Open</I>).</FONT></P>
<LI><P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Compile
the package (click <I>Compile</I> in Package Editor's tool bar).</FONT></P>
<LI><P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Install
the package in the IDE (click <I>Install</I> – you will be asked
if you want to rebuild Lazarus, click <I>Yes</I>. Wait until
Lazarus rebuilds and restarts itself. The new tab “<I>Date and
Time Ctrls”</I> appears on the component palette with
TZVDateTimePicker and TDBZVDateTimePicker controls.</FONT></P>
</OL>
</OL>
<P STYLE="margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Change
Log</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">For more details about changes, see
ChangeLog.txt</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Version 1.0 – 27. February 2010.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Version 1.1 – 17. April 2010.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Version 1.2 – 12. May 2010.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Version 1.3 – 1. April 2011.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-bottom: 0cm; font-weight: normal">
<FONT FACE="Arial, sans-serif">Version 1.4 – 4. September 2012.</FONT></P>
<P STYLE="margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-bottom: 0cm"><A NAME="TZVDateTimePicker"></A><FONT FACE="Arial, sans-serif"><B>TZVDateTimePicker
<IMG SRC="pictures/TZVDateTimePicker.png" NAME="grafika9" ALIGN=MIDDLE WIDTH=24 HEIGHT=24 BORDER=0></B></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Properties:</B></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif">I'll explain some properties of
TZVDateTimePicker control: </FONT>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>DateTime: TDateTime (public)</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">The
DateTime value displayed on the control. This property is not
published in object inspector, but its value is actually the same as
Date and Time properties composed in one value. This property is
provided to allow setting or reading of both date and time value at
once in program code. In design time, Date and Time can be set in
object inspector. <A CLASS="western" HREF="#ZVDateTimePicker Editor">There
is also component editor</A> which provides easy way of setting this
property in design time.</SPAN></FONT></P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Date: TDate</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
date displayed on the control which the user can edit.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Time: TTime</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
time displayed on the control which the user can edit.</FONT></P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>MinDate: TDate</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
minimal date user can enter.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>MaxDate: TDate</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
maximal date user can enter.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm"><A NAME="NullInputAllowed"></A>
<FONT FACE="Arial, sans-serif"><B>NullInputAllowed: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">When
True, the user can set the date to NullDate constant by pressing N
key.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>CenturyFrom: Word</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">When
user enters the year in two-digit format, then the CenturyFrom
property is used to determine which century the year belongs to. The
default is 1941, which means that when two digit years is entered, it
falls in interval 1941 – 2040. Note that MinDate and MaxDate
properties can also have influence on the decision – for example,
if the CenturyFrom is set to 1941 and MaxDate to 31. 12. 2010, if
user enters year 23, it will be set to 1923, because it can’t be
2033, due to MaxDate limit.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Kind: TDateTimeKind</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>type</B>
TDateTimeKind = (dtkDate, dtkTime, dtkDateTime);</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
control displays only date, only time or both.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><IMG SRC="pictures/ZVDateControls03.PNG" NAME="grafika4" ALIGN=BOTTOM WIDTH=332 HEIGHT=40 BORDER=0></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>DateMode: TDTDateMode</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>type</B>
TDTDateMode = (dmComboBox, dmUpDown, dmNone);</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">When
DateMode is set to dmComboBox, there is a button on the right side of
the control. When user clicks the button, <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/lcl/calendar/tcalendar.html">the
calendar control</A> is shown, allowing the user to pick the date.
When set to dmUpDown, then UpDown buttons are shown.</SPAN></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">In
my opinion the UpDown buttons aren't really useful in this control,
they are provided for compatibility with Delphi's TDateTimePicker. Up
and down keys can always serve for same purpose, so can mouse wheel.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">In
the next picture the first control's DateMode is set to dmComboBox
and the second control's to dmUpDown.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><IMG SRC="pictures/ZVDateControls01.PNG" NAME="grafika1" ALIGN=BOTTOM WIDTH=151 HEIGHT=72 BORDER=0></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">If
DateMode is dmComboBox, when the user clicks on the button a calendar
drops down, allowing the user to pick a date.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Note:</B>
if Kind property is set to dtkTime, the calendar control is
pointless. Therefore, if DateMode is dmComboBox, the UpDown is shown
instead.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>ShowCheckBox: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">When
set, there is a check box on the left side of the control. When
unchecked, the display appears grayed and user interaction with the
date or time is not possible. (The control is still enabled, though,
only in sense that the check box remains enabled).</FONT></P>
<P STYLE="margin-left: 2cm"><IMG SRC="pictures/ZVDateControls02.PNG" NAME="grafika3" ALIGN=BOTTOM WIDTH=116 HEIGHT=35 BORDER=0></P>
<P STYLE="margin-left: 2cm"><BR><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Checked: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">If
ShowCheckBox is set to True, this property determines whether the
check box is checked or not. If ShowCheckBox is False, this property
has no purpose and is automatically set to True.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>DateDisplayOrder: TDateDisplayOrder</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>type</B>
TDateDisplayOrder = (ddoDMY, ddoMDY, ddoYMD, ddoTryDefault);</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">Defines
the order for displaying day, month and year part of the date. When
ddoTryDefault is set, then the controls tries to determine the order
from <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/rtl/sysutils/shortdateformat.html">ShortDateFormat
global variable</A>.</SPAN></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">This
is similar to <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/lcl/editbtn/tdateedit.dateorder.html">DateEdit's
DateOrder</A> property.</SPAN></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>DateSeparator: String</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Defines
the string used to separate date, month and year date parts. Setting
this property automatically sets the UseDefaultSeparators property to
False. To ensure that date and time separators are set to user's
system defaults, set UseDefaultSeparators property to True.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>TimeSeparator: String</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Defines
the string used to separate hour, minute, second and millisecond time
parts. Setting this property automatically sets the
UseDefaultSeparators property to False. To ensure that date and time
separators are set to user's system defaults, set
UseDefaultSeparators property to True.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>UseDefaultSeparators: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">When
this property is set to True, then the DateSeparator and
TimeSeparator properties will be set to <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/rtl/sysutils/dateseparator.html">DateSeparator</A>
and <A CLASS="western" HREF="http://lazarus-ccr.sourceforge.net/docs/rtl/sysutils/timeseparator.html">TimeSeparator</A>
global variables, which are set to user system defaults when
application initializes.</SPAN></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>TrailingSeparator: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">When
set to True, then the DateSeparator is shown once more, after the
last date part. This property exists because in some languages the
correct date format is <B>31. 1. 2010.</B> including the last point,
after the year.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>LeadingZeros: Boolean</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">Determines
whether the date and time parts are displayed with or without leading
zeros (this actually affects day, month and hour parts of date and
time display).</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>TimeDisplay: TTimeDisplay</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>type</B>
TTimeDisplay = (tdHM, tdHMS, tdHMSMs);</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">If
Kind is dtkTime or dtkDateTime, then TimeDisplay value of tdHM means
that only hours and minutes are displayed, tdHMS adds displaying of
seconds and value of tdHMSMs means that milliseconds are displayed
too.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>TimeFormat: TTimeFormat</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>type</B>
TTimeFormat = (tf12, tf24);</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">The
value of tf12 sets the display of time to 12 hours format, with AM/PM
string and tf24 sets to 24 hours format.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0cm"><A NAME="TextForNullDate"></A>
<FONT FACE="Arial, sans-serif"><B>TextForNullDate: String</B></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">Text
which appears when the null date is set and control does not have
focus. When control is focused, the text changes to defined format,
but displaying zeros for date, and nines for time (for example
&quot;00/00/0000 99:99:99&quot;), which is appropriate to user input.
User can set the date to NullDate by pressing N key, provided
<A CLASS="western" HREF="#NullInputAllowed">NullInputAllowed</A>
property is True.</SPAN></FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif">When
TextForNullDate is set to empty string, zeros/nines format is
displayed even when control does not have focus. If you want empty
display, this can be acchieved by setting TextForNullDate to one or
more space characters.</FONT></P>
<P STYLE="margin-left: 2cm; margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<P STYLE="margin-top: 0.18cm; margin-bottom: 0cm"><A NAME="TDBZVDateTimePicker"></A>
<FONT FACE="Arial, sans-serif"><B>TDBZVDateTimePicker
<IMG SRC="pictures/TDBZVDateTimePicker.png" NAME="grafika6" ALIGN=MIDDLE WIDTH=24 HEIGHT=24 BORDER=0></B></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif">TDBZVDateTimePicker is a data-aware
version of TZVDateTimePicker, with nice way of handling null database
values.</FONT></P>
<P STYLE="margin-top: 0.18cm; margin-bottom: 0cm"><BR>
</P>
<H4 CLASS="western" STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0.21cm">
<FONT FACE="Arial, sans-serif"><B>Displaying null values </B></FONT>
</H4>
<DL>
<DL>
<DD STYLE="margin-bottom: 0.5cm"><FONT FACE="Arial, sans-serif">When
the underlying DB field has null value, then:</FONT></DD></DL>
</DL>
<UL>
<UL>
<LI><DD STYLE="margin-bottom: 0.5cm">
<FONT FACE="Arial, sans-serif">When the control gets focus, the
text changes to defined format, but displaying zeros for date parts
and nines for time parts (for example &quot;00/00/0000 99:99:99&quot;),
which is appropriate to user input.</FONT></DD><LI><DD STYLE="margin-bottom: 0.5cm">
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">When the control
is not focused, then it displays the text defined in
<A CLASS="western" HREF="#TextForNullDate">TextForNullDate</A>
property. The default is &quot;NULL&quot;.</SPAN></FONT></DD></UL>
</UL>
<H4 CLASS="western" STYLE="margin-left: 1.48cm; margin-top: 0.18cm; margin-bottom: 0.21cm">
<FONT FACE="Arial, sans-serif">Setting the field value to null </FONT>
</H4>
<DL>
<DL>
<DD STYLE="margin-bottom: 0.5cm"><FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">If
<A CLASS="western" HREF="#NullInputAllowed">NullInputAllowed</A>
property is True, the user can set the date and time to null, by
pressing N key. </SPAN></FONT>
</DD></DL>
</DL>
<P STYLE="margin-top: 0.18cm; margin-bottom: 0cm">
<A NAME="ZVDateTimePicker Editor"></A><FONT FACE="Arial, sans-serif"><B>ZVDateTimePicker
Editor</B></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<IMG SRC="pictures/ZVDateTimePickerEditor.PNG" NAME="grafika8" ALIGN=BOTTOM WIDTH=404 HEIGHT=188 BORDER=0></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif">ZVDateTimePicker Editor is a dialog
which provides easy way to set Date, Time, MinDate and MaxDate
properties in design time. It is invoked when ZVDateTimePicker
control is double-clicked in form designer. It is also shown when the
elipsis (…) button, shown in Date, Time, MinDate and MaxDate
properties in Object inspector, gets clicked.</FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-top: 0.18cm; margin-bottom: 0cm"><FONT FACE="Arial, sans-serif"><B>Tips</B></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><B>Q:</B> When the date/time value is
null, how to display zeros/nines in user format, no matter whether
the control is focused or not?</FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US"><B>A:</B></SPAN></FONT>
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">Set <A CLASS="western" HREF="#TextForNullDate">TextForNullDate</A>
property to empty string. If TextForNullDate is set to empty string,
then zeros/nines are displayed, same as when the control has focus.</SPAN></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<BR>
</P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US"><B>Q:</B></SPAN></FONT>
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">When the date/time
value is null, If empty string in <A CLASS="western" HREF="#TextForNullDate">TextForNullDate</A>
property actually sets the display to zeros/nines format, how to set
the control to display nothing?</SPAN></FONT></P>
<P STYLE="margin-left: 0.85cm; margin-top: 0.18cm; margin-bottom: 0cm">
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US"><B>A:</B></SPAN></FONT>
<FONT FACE="Arial, sans-serif"><SPAN LANG="en-US">Set <A CLASS="western" HREF="#TextForNullDate">TextForNullDate</A>
property to one space character, you will get the empty display.</SPAN></FONT></P>
</BODY>
</HTML>

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{
TDBZVDateTimePicker control for Lazarus
- - - - - - - - - - - - - - - - - - - -
Author: Zoran Vučenović, January and February 2010
Зоран Вученовић, јануар и фебруар 2010.
Last change: August 2012
This unit is part of ZVDateTimeCtrls package for Lazarus.
TDBZVDateTimePicker is data-aware version of TZVDateTimePicker control.
-----------------------------------------------------------
LICENCE
- - - -
Modified LGPL -- see the file COPYING.modifiedLGPL.
-----------------------------------------------------------
NO WARRANTY
- - - - - -
There is no warranty whatsoever.
-----------------------------------------------------------
BEST REGARDS TO LAZARUS COMMUNITY!
- - - - - - - - - - - - - - - - - -
I do hope this control will be useful.
}
unit DBZVDateTimePicker;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, ZVDateTimePicker, db, DBCtrls;
type
{ TDBZVDateTimePicker }
TDBZVDateTimePicker = class(TCustomZVDateTimePicker)
private
{ Private declarations }
FDataLink: TFieldDataLink;
FReadOnly: Boolean;
FDataChangeCount: Integer;
FChangingCount: Integer;
function GetDataField: string;
function GetDataSource: TDataSource;
procedure SetDataField(const AValue: string);
procedure SetDataSource(const AValue: TDataSource);
procedure DataChange(Sender: TObject);
procedure SetReadOnly(const AValue: Boolean);
procedure UpdateData(Sender: TObject);
procedure ActiveChange(Sender: TObject);
function GetField: TField;
procedure CheckField;
protected
{ Protected declarations }
procedure Change; override;
procedure ConfirmChanges; override;
procedure UndoChanges; override;
public
{ Public declarations }
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property Field: TField read GetField;
published
{ Published declarations }
property DataField: string read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read FReadOnly write SetReadOnly;
property ArrowShape;
property ShowCheckBox;
property Checked;
property CenturyFrom;
property DateDisplayOrder;
property MaxDate;
property MinDate;
property AutoSize;
property Font;
property ParentFont;
property TabOrder;
property TabStop;
property BorderStyle;
property BorderSpacing;
property Enabled;
property Color;
property ParentColor;
property DateSeparator;
property TrailingSeparator;
property TextForNullDate;
property LeadingZeros;
property ShowHint;
property ParentShowHint;
property Align;
property Anchors;
property Constraints;
property Cursor;
property PopupMenu;
property Visible;
property NullInputAllowed;
property Kind;
property TimeSeparator;
property TimeFormat;
property TimeDisplay;
{ property Time; This property should NOT be published here, it was
accidentally added in first release. }
property DateMode;
property UseDefaultSeparators;
//events:
property OnChange;
property OnCheckBoxChange;
property OnDropDown;
property OnCloseUp;
property OnChangeBounds;
property OnClick;
property OnContextPopup;
property OnDblClick;
property OnEditingDone;
property OnEnter;
property OnExit;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseEnter;
property OnMouseMove;
property OnMouseUp;
property OnMouseLeave;
property OnResize;
property OnUTF8KeyPress;
end;
implementation
{ TDBZVDateTimePicker }
function TDBZVDateTimePicker.GetDataField: string;
begin
Result := FDataLink.FieldName;
end;
function TDBZVDateTimePicker.GetDataSource: TDataSource;
begin
Result := FDataLink.DataSource;
end;
procedure TDBZVDateTimePicker.SetDataField(const AValue: string);
begin
FDataLink.FieldName := AValue;
CheckField;
end;
procedure TDBZVDateTimePicker.SetDataSource(const AValue: TDataSource);
begin
ChangeDataSource(Self, FDataLink, AValue);
CheckField;
end;
procedure TDBZVDateTimePicker.DataChange(Sender: TObject);
begin
if (FChangingCount = 0) then begin
Inc(FDataChangeCount);
try
if Assigned(FDataLink.Field) and not FDataLink.Field.IsNull then begin
// Using the SetTheDateJumpMinMax procedure, instead of property
SetDateTimeJumpMinMax(FDataLink.Field.AsDateTime); // assignment allows
// this control to display dates from database whose value falls
// outside of MinDate and MaxDate interval.
// Note that user still cannot enter such values in the control.
end else
DateTime := NullDate;
finally
Dec(FDataChangeCount);
end;
end;
end;
procedure TDBZVDateTimePicker.SetReadOnly(const AValue: Boolean);
begin
if FReadOnly <> AValue then begin
FReadOnly := AValue;
CheckField;
end;
end;
procedure TDBZVDateTimePicker.UpdateData(Sender: TObject);
begin
if Assigned(FDataLink.Field) then begin
if DateIsNull then
FDataLink.Field.AsVariant := Null
else
FDataLink.Field.AsDateTime := DateTime;
end;
end;
procedure TDBZVDateTimePicker.ActiveChange(Sender: TObject);
begin
CheckField;
end;
function TDBZVDateTimePicker.GetField: TField;
begin
Result := FDataLink.Field;
end;
procedure TDBZVDateTimePicker.CheckField;
begin
if (FDataLink.Active) and Assigned(FDataLink.Field) then
inherited ReadOnly := FReadOnly or (not FDataLink.CanModify)
else begin
inherited ReadOnly := True;
DateTime := NullDate;
end;
end;
procedure TDBZVDateTimePicker.Change;
begin
if (FDataChangeCount <= 0) and Assigned(FDataLink) then begin
Inc(FChangingCount);
try
if FDataLink.Edit then begin
FDataLink.Modified;
inherited Change; // calls OnChange event handler
end else
FDataLink.Reset; // reverts user changes
finally
Dec(FChangingCount);
end;
end;
end;
procedure TDBZVDateTimePicker.ConfirmChanges;
begin
inherited ConfirmChanges;
if Assigned(FDataLink) then
try
FDataLink.UpdateRecord;
except
SetFocus;
raise;
end;
end;
procedure TDBZVDateTimePicker.UndoChanges;
begin
FDataLink.Reset;
inherited UndoChanges;
end;
constructor TDBZVDateTimePicker.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDataChangeCount := 0;
FChangingCount := 0;
FDataLink := TFieldDataLink.Create;
FDataLink.Control := Self;
DateTime := NullDate;
FDataLink.OnActiveChange := @ActiveChange;
FDataLink.OnDataChange := @DataChange;
FDataLink.OnUpdateData := @UpdateData;
CheckField;
end;
destructor TDBZVDateTimePicker.Destroy;
begin
FDataLink.OnUpdateData := nil;
FDataLink.OnDataChange := nil;
FDataLink.OnActiveChange := nil;
FreeAndNil(FDataLink);
inherited Destroy;
end;
end.

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{
ZVDateTimeControlsReg
- - - - - - - - - - - - - - - - - -
Author: Zoran Vučenović, January and February 2010
Зоран Вученовић, јануар и фебруар 2010.
This unit is part of ZVDateTimeCtrls package for Lazarus.
-----------------------------------------------------------
LICENCE
- - - -
Modified LGPL -- see the file COPYING.modifiedLGPL.
-----------------------------------------------------------
NO WARRANTY
- - - - - -
There is no warranty whatsoever.
-----------------------------------------------------------
BEST REGARDS TO LAZARUS COMMUNITY!
- - - - - - - - - - - - - - - - - -
I do hope the ZVDateTimeCtrls package will be useful.
}
unit ZVDateTimeControlsReg;
{$mode objfpc}{$H+}
interface
procedure Register;
implementation
uses
Classes, ZVDateTimePicker, DBZVDateTimePicker, LResources;
procedure Register;
begin
RegisterComponents('Date and Time Ctrls', [
TZVDateTimePicker,
TDBZVDateTimePicker
]);
end;
initialization
{$i zvdatetimectrls.lrs}
end.

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<?xml version="1.0"?>
<CONFIG>
<Package Version="4">
<PathDelim Value="\"/>
<Name Value="ZVDateTimeCtrls"/>
<AddToProjectUsesSection Value="True"/>
<Author Value="Zoran Vučenović"/>
<CompilerOptions>
<Version Value="11"/>
<PathDelim Value="\"/>
<SearchPaths>
<UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
</SearchPaths>
<CodeGeneration>
<SmartLinkUnit Value="True"/>
<Optimizations>
<OptimizationLevel Value="2"/>
</Optimizations>
</CodeGeneration>
<Other>
<CompilerMessages>
<UseMsgFile Value="True"/>
</CompilerMessages>
<CompilerPath Value="$(CompPath)"/>
</Other>
</CompilerOptions>
<Description Value="TZVDateTimePicker - the cross-platform control behaving much like VCL's TDateTimePicker. TDBZVDateTimePicker - the data-aware version of TZVDateTimePicker"/>
<License Value="Modified LGPL"/>
<Version Major="1" Minor="4"/>
<Files Count="5">
<Item1>
<Filename Value="zvdatetimepicker.pas"/>
<UnitName Value="ZVDateTimePicker"/>
</Item1>
<Item2>
<Filename Value="dbzvdatetimepicker.pas"/>
<UnitName Value="DBZVDateTimePicker"/>
</Item2>
<Item3>
<Filename Value="zvdatetimepickerpropedit.pas"/>
<UnitName Value="ZVDateTimePickerPropEdit"/>
</Item3>
<Item4>
<Filename Value="zvdatetimecontrolsreg.pas"/>
<HasRegisterProc Value="True"/>
<UnitName Value="ZVDateTimeControlsReg"/>
</Item4>
<Item5>
<Filename Value="zvdatetimectrls.lrs"/>
<Type Value="LRS"/>
</Item5>
</Files>
<Type Value="RunAndDesignTime"/>
<RequiredPkgs Count="3">
<Item1>
<PackageName Value="IDEIntf"/>
</Item1>
<Item2>
<PackageName Value="LCL"/>
</Item2>
<Item3>
<PackageName Value="FCL"/>
<MinVersion Major="1" Valid="True"/>
</Item3>
</RequiredPkgs>
<UsageOptions>
<UnitPath Value="$(PkgOutDir)"/>
</UsageOptions>
<PublishOptions>
<Version Value="2"/>
<IgnoreBinaries Value="False"/>
</PublishOptions>
<CustomOptions Items="ExternHelp" Version="2">
<_ExternHelp Items="Count"/>
</CustomOptions>
</Package>
</CONFIG>

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components/ZVDateTimeCtrls/tags/1.4/zvdatetimectrls.lrs Normal file
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LazarusResources.Add('TZVDateTimePicker','PNG',[
#137'PNG'#13#10#26#10#0#0#0#13'IHDR'#0#0#0#24#0#0#0#24#8#6#0#0#0#224'w='#248#0
+#0#0#7'tIME'#7#218#3#23#8'$'#25'n'#143#152#193#0#0#0#23'tEXtSoftware'#0'GLDP'
+'NG ver 3.4q'#133#164#225#0#0#0#8'tpNGGLD3'#0#0#0#0'J'#128')'#31#0#0#0#4'gAM'
+'A'#0#0#177#143#11#252'a'#5#0#0#0#206'IDATx'#156#221#148'1'#14#2'!'#16'E9'
+#150'g"'#246#155'P'#209#210'Zx'#6'.`'#236#12#198#214#27'Xli'#165'{'#132#209
+#193#176'!d 0B'#161#147#188#252'd'#19#230#207#31#194#10#241#23'5M;'#232#9'i'
+#176','#143'f'#210's'#238'|)'#27'h'#173'AJY'#165#177#129#16#218#19#12'P'#179
+#9#156's`'#173#173#210'pN)'#5#198#152':'#131#214#21'a'#179#152#172'A'#12'NTC'
+#238#146'I'#131'y'#190#193'f{bA%!'#13#184#144'SS'#6#251#195#157#165'M'#6'%'
+#222#29'V'#226#239#221#18'`'#227#143#194#200#4#224#25#146#160#219#29#228'v'
+#157'r'#188'>='#205#9'r'#187'N'#21#155'3'#19#0#185#235'tr'#150'A'#205#196'A'
+#155#31#218#208#151#252'-E'#3#172#244'g'#197#161'h'#240#179#245#2'2'#16#136
+#27#211'e'#18'f'#0#0#0#0'IEND'#174'B`'#130
]);
LazarusResources.Add('TDBZVDateTimePicker','PNG',[
#137'PNG'#13#10#26#10#0#0#0#13'IHDR'#0#0#0#24#0#0#0#24#8#6#0#0#0#224'w='#248#0
+#0#0#7'tIME'#7#218#3#23#8'1'#25'Y:~'#213#0#0#0#23'tEXtSoftware'#0'GLDPNG ver'
+' 3.4q'#133#164#225#0#0#0#8'tpNGGLD3'#0#0#0#0'J'#128')'#31#0#0#0#4'gAMA'#0#0
+#177#143#11#252'a'#5#0#0#1'(IDATx'#156'c`'#160'''X~'#232#217#127#167#178'#X1'
+'H'#142'*'#6'_~'#248#249'?'#8#128#232#189#23#223#128#13#158#184#233'>e'#22
+#129'4'#22#204#190#6'6'#8'd('#186#225#213#139'o'#130#229'S&_'#2'[B'#178#5'0'
+#141'0'#23'b3'#28'&'#15'RK'#150#5' '#131#144#131#2#29'#'#251#130'd'#11'\+'
+#142#194'-'#0#185#30'['#28' '#251#132','#31#128','#1'i'#134'YP^>'#137'"L0'
+#136'@'#138#136#5' '#181#207#159'?'#134'c'#16#127#253#134#237#8'K'#176#5#17
+#204#2'CCc'#188#24#217#2'{{;'#236#22#224#10'"'#170#249#0'W'#16#193'pee'#227
+#255#170#170'*'#156#184#162#162#3'#'#14#136#10#162#251#247'o'#255#159#182#245
+'9Q4'#204'P'#24'F'#137'dPR'#196#22'D '#205#196'b'#12'Wc'#3#200'e'#18'!'#31#0
+'M'#2'ct'#31#16#157'7'#8#249#0#217#2#162'}'#128'n'#1'9q@'#150#15#208']Kv'#28
+#224#242#1#204#2#154#249#0#31#222'~'#230#29#24'S='#14'@'#134'"'#211'dY@*&'
+#201#2#16'x'#255#254'-'#195#186'u'#219#255#195'0rN'#197#133'I'#178#128#26#0#0
+#242#176#9'l'#161#206':'#16#0#0#0#0'IEND'#174'B`'#130
]);

22
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{ This file was automatically created by Lazarus. Do not edit!
This source is only used to compile and install the package.
}
unit ZVDateTimeCtrls;
interface
uses
ZVDateTimePicker, DBZVDateTimePicker, ZVDateTimePickerPropEdit,
ZVDateTimeControlsReg, LazarusPackageIntf;
implementation
procedure Register;
begin
RegisterUnit('ZVDateTimeControlsReg', @ZVDateTimeControlsReg.Register);
end;
initialization
RegisterPackage('ZVDateTimeCtrls', @Register);
end.

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{
ZVDateTimePickerPropEdit
- - - - - - - - - - - - - - - - -
Author: Zoran Vučenović, January and February 2010
Зоран Вученовић, јануар и фебруар 2010.
Last change: August 2012.
This unit is part of ZVDateTimeCtrls package for Lazarus. It contains
component and property editors for TZVDateTimePicker control.
-----------------------------------------------------------
LICENCE
- - - -
Modified LGPL -- see the file COPYING.modifiedLGPL.
-----------------------------------------------------------
NO WARRANTY
- - - - - -
There is no warranty whatsoever.
-----------------------------------------------------------
BEST REGARDS TO LAZARUS COMMUNITY!
- - - - - - - - - - - - - - - - - -
I do hope the ZVDateTimeCtrls package will be useful.
}
unit ZVDateTimePickerPropEdit;
{$mode objfpc}{$H+}
interface
// Nothing needs to be in interface section!
implementation
uses
Classes, SysUtils, Forms, Controls, ButtonPanel, ZVDateTimePicker,
DBZVDateTimePicker, StdCtrls, Math, Menus, ComponentEditors, PropEdits;
type
{ TFormZVDateTimePickerEditor }
TFormZVDateTimePickerEditor = class(TForm)
private
CallerZVDateTimePicker: TZVDateTimePicker;
Prop: String;
Modified: Boolean;
ButtonPanel: TButtonPanel;
ZVDateTimePickerMin: TZVDateTimePicker;
ZVDateTimePicker1: TZVDateTimePicker;
ZVDateTimePickerMax: TZVDateTimePicker;
Label1: TLabel;
LabelMin: TLabel;
LabelMax: TLabel;
LabelNull: TLabel;
procedure ZVDateTimePickerMaxExit(Sender: TObject);
procedure ZVDateTimePickerMinExit(Sender: TObject);
procedure ZVDateTimePickersChange(Sender: TObject);
procedure ZVDateTimePicker1Enter(Sender: TObject);
procedure ZVDateTimePicker1Exit(Sender: TObject);
procedure FormActivate(Sender: TObject);
procedure Initialize(const Caller: TZVDateTimePicker;
const PropertyName, PropertyType: String);
procedure UpdateMinMaxBounds;
public
constructor CreateNew(AOwner: TComponent; Num: Integer = 0); override;
destructor Destroy; override;
end;
{ TZVDateTimePickerComponentEditor }
TZVDateTimePickerComponentEditor = class(TComponentEditor)
public
procedure ExecuteVerb(Index: Integer); override;
function GetVerb(Index: Integer): string; override;
function GetVerbCount: Integer; override;
end;
{ TZVDateTimePickerDateTimePropEditor }
TZVDateTimePickerDateTimePropEditor = class(TDateTimePropertyEditor)
public
function GetAttributes: TPropertyAttributes; override;
function AllEqual: Boolean; override;
function GetValue: string; override;
procedure SetValue(const Value: string); override;
procedure Edit; override;
end;
{ TSimpleDatePropEditor }
TSimpleDatePropEditor = class(TDatePropertyEditor)
public
function GetValue: string; override;
procedure SetValue(const Value: string); override;
end;
procedure RegPropEdits;
begin
RegisterPropertyEditor(TypeInfo(TTime), TZVDateTimePicker, 'Time', TZVDateTimePickerDateTimePropEditor);
RegisterPropertyEditor(TypeInfo(TDate), TZVDateTimePicker, 'Date', TZVDateTimePickerDateTimePropEditor);
RegisterPropertyEditor(TypeInfo(TDate), TZVDateTimePicker, 'MaxDate', TZVDateTimePickerDateTimePropEditor);
RegisterPropertyEditor(TypeInfo(TDate), TZVDateTimePicker, 'MinDate', TZVDateTimePickerDateTimePropEditor);
RegisterPropertyEditor(TypeInfo(TDate), TDBZVDateTimePicker, 'MaxDate', TSimpleDatePropEditor);
RegisterPropertyEditor(TypeInfo(TDate), TDBZVDateTimePicker, 'MinDate', TSimpleDatePropEditor);
end;
{ TZVDateTimePickerComponentEditor }
procedure TZVDateTimePickerComponentEditor.ExecuteVerb(Index: Integer);
var
F: TFormZVDateTimePickerEditor;
DTPicker: TZVDateTimePicker;
begin
if Index = 0 then begin
if GetComponent is TZVDateTimePicker then begin
F := TFormZVDateTimePickerEditor.CreateNew(nil, 0);
try
DTPicker := TZVDateTimePicker(GetComponent);
if DTPicker.Kind = dtkTime then
F.Initialize(DTPicker, '', 'TTime')
else
F.Initialize(DTPicker, '', '');
if F.ShowModal = mrOK then begin
if F.Modified then begin
DTPicker.MinDate := TheSmallestDate;
DTPicker.MaxDate := F.ZVDateTimePickerMax.DateTime;
DTPicker.MinDate := F.ZVDateTimePickerMin.DateTime;
DTPicker.DateTime := F.ZVDateTimePicker1.DateTime;
Modified;
GlobalDesignHook.RefreshPropertyValues;
end;
end;
finally
F.Free;
end;
end else
raise Exception.Create('Unknown ZVDateTimePicker object to edit.');
end;
end;
function TZVDateTimePickerComponentEditor.GetVerb(Index: Integer): string;
begin
if Index = 0 then
Result := '&Date/Time Editor...';
end;
function TZVDateTimePickerComponentEditor.GetVerbCount: Integer;
begin
Result := 1;
end;
{ TFormZVDateTimePickerEditor }
procedure TFormZVDateTimePickerEditor.ZVDateTimePickerMaxExit(Sender: TObject);
begin
if ZVDateTimePickerMin.Date > ZVDateTimePickerMax.Date then
ZVDateTimePickerMin.Date := ZVDateTimePickerMax.Date;
UpdateMinMaxBounds;
end;
procedure TFormZVDateTimePickerEditor.ZVDateTimePickerMinExit(Sender: TObject);
begin
if ZVDateTimePickerMax.Date < ZVDateTimePickerMin.Date then
ZVDateTimePickerMax.Date := ZVDateTimePickerMin.Date;
UpdateMinMaxBounds;
end;
procedure TFormZVDateTimePickerEditor.ZVDateTimePickersChange(Sender: TObject);
begin
Modified := True;
end;
procedure TFormZVDateTimePickerEditor.ZVDateTimePicker1Enter(Sender: TObject);
begin
if ZVDateTimePicker1.NullInputAllowed then
LabelNull.Show;
end;
procedure TFormZVDateTimePickerEditor.ZVDateTimePicker1Exit(Sender: TObject);
begin
LabelNull.Hide;
end;
procedure TFormZVDateTimePickerEditor.FormActivate(Sender: TObject);
var
B: Boolean;
begin
OnActivate := nil;
B := False;
if Prop = 'MAXDATE' then ZVDateTimePickerMax.SetFocus
else if Prop = 'MINDATE' then ZVDateTimePickerMin.SetFocus
else begin
ZVDateTimePicker1.SetFocus;
B := ZVDateTimePicker1.NullInputAllowed;
end;
LabelNull.Visible := B;
LabelNull.BringToFront;
end;
procedure TFormZVDateTimePickerEditor.Initialize(const Caller: TZVDateTimePicker;
const PropertyName, PropertyType: String);
var
I: Integer;
DTP: array[1..3] of TZVDateTimePicker;
L, T, W, H: Integer;
R: TRect;
begin
if Assigned(Caller) then begin
CallerZVDateTimePicker := Caller;
Prop := UpperCase(PropertyName);
Modified := False;
ZVDateTimePicker1.Kind := dtkDateTime;
if UpperCase(PropertyType) = 'TTIME' then
ZVDateTimePicker1.SelectTime
else
ZVDateTimePicker1.SelectDate;
Label1.Caption := 'Date / Time:';
LabelMax.Caption := 'MaxDate:';
LabelMin.Caption := 'MinDate:';
LabelNull.Caption := '(Press N to set to NULL)';
ZVDateTimePickerMin.DateTime := CallerZVDateTimePicker.MinDate;
ZVDateTimePickerMax.DateTime := CallerZVDateTimePicker.MaxDate;
ZVDateTimePicker1.MinDate := CallerZVDateTimePicker.MinDate;
ZVDateTimePicker1.MaxDate := CallerZVDateTimePicker.MaxDate;
ZVDateTimePicker1.DateTime := CallerZVDateTimePicker.DateTime;
DTP[1] := ZVDateTimePickerMin;
DTP[2] := ZVDateTimePickerMax;
DTP[3] := ZVDateTimePicker1;
for I := 1 to 3 do begin
DTP[I].NullInputAllowed := I = 3;
DTP[I].CenturyFrom := CallerZVDateTimePicker.CenturyFrom;
DTP[I].DateDisplayOrder := CallerZVDateTimePicker.DateDisplayOrder;
DTP[I].LeadingZeros := CallerZVDateTimePicker.LeadingZeros;
DTP[I].DateSeparator := CallerZVDateTimePicker.DateSeparator;
DTP[I].TrailingSeparator := CallerZVDateTimePicker.TrailingSeparator;
end;
ZVDateTimePicker1.TextForNullDate := CallerZVDateTimePicker.TextForNullDate;
ZVDateTimePicker1.TimeSeparator := CallerZVDateTimePicker.TimeSeparator;
ZVDateTimePicker1.TimeDisplay := tdHMSMs;
ZVDateTimePicker1.TimeFormat := CallerZVDateTimePicker.TimeFormat;
ZVDateTimePickerMax.AnchorParallel(akTop, 20, Self);
ZVDateTimePickerMax.AnchorParallel(akRight, 20, Self);
LabelMax.AnchorVerticalCenterTo(ZVDateTimePickerMax);
LabelMax.AnchorToNeighbour(akRight, 2, ZVDateTimePickerMax);
ZVDateTimePickerMin.AnchorParallel(akTop, 20, Self);
ZVDateTimePickerMin.AnchorToNeighbour(akRight, 20, LabelMax);
LabelMin.AnchorToNeighbour(akRight, 2, ZVDateTimePickerMin);
LabelMin.AnchorVerticalCenterTo(ZVDateTimePickerMin);
ZVDateTimePicker1.AnchorParallel(akLeft, 0, ZVDateTimePickerMin);
ZVDateTimePicker1.AnchorToNeighbour(akTop, 20, ZVDateTimePickerMin);
Label1.AnchorToNeighbour(akRight, 2, ZVDateTimePicker1);
Label1.AnchorVerticalCenterTo(ZVDateTimePicker1);
LabelNull.AnchorToNeighbour(akTop, 2, ZVDateTimePicker1);
LabelNull.AnchorHorizontalCenterTo(ZVDateTimePicker1);
ButtonPanel.Spacing := 10;
ButtonPanel.BorderSpacing.Around := 10;
W := Max(Label1.Width, LabelMin.Width);
W := ZVDateTimePickerMax.Width + ZVDateTimePickerMin.Width
+ LabelMax.Width + W + 80;
H := 2 * ZVDateTimePickerMax.Height + LabelNull.Height + ButtonPanel.Height + 58;
R := Screen.MonitorFromWindow(CallerZVDateTimePicker.Handle).WorkareaRect;
L := (R.Left + R.Right - W) div 2;
T := (R.Top + R.Bottom - H) div 2;
if L < R.Left then L := R.Left;
if T < R.Top then T := R.Top;
SetBounds(L, T, W, H);
end;
end;
procedure TFormZVDateTimePickerEditor.UpdateMinMaxBounds;
begin
ZVDateTimePicker1.MinDate := TheSmallestDate;
ZVDateTimePicker1.MaxDate := ZVDateTimePickerMax.Date;
ZVDateTimePicker1.MinDate := ZVDateTimePickerMin.Date;
end;
constructor TFormZVDateTimePickerEditor.CreateNew(AOwner: TComponent;
Num: Integer);
var
I: Integer;
begin
inherited CreateNew(AOwner, Num);
Hide;
if Font.Size > 10 then
Font.Size := 10;
SetBounds(-8000, -8000, 4, 5);
BorderStyle := bsDialog;
BorderIcons := [biSystemMenu];
Caption := 'ZVDateTimePicker Editor';
ZVDateTimePickerMax := TZVDateTimePicker.Create(Self);
ZVDateTimePickerMin := TZVDateTimePicker.Create(Self);
ZVDateTimePicker1 := TZVDateTimePicker.Create(Self);
Label1 := TLabel.Create(Self);
LabelMin := TLabel.Create(Self);
LabelMax := TLabel.Create(Self);
LabelNull := TLabel.Create(Self);
ButtonPanel := TButtonPanel.Create(Self);
ButtonPanel.ShowButtons := [pbOK, pbCancel];
ButtonPanel.OKButton.GlyphShowMode := gsmAlways;
ButtonPanel.CancelButton.GlyphShowMode := gsmAlways;
ButtonPanel.ShowBevel := False;
ZVDateTimePickerMax.Parent := Self;
ZVDateTimePickerMin.Parent := Self;
ZVDateTimePicker1.Parent := Self;
Label1.Parent := Self;
LabelMin.Parent := Self;
LabelMax.Parent := Self;
LabelNull.Parent := Self;
ButtonPanel.Parent := Self;
ButtonPanel.TabOrder := 0;
ZVDateTimePickerMin.TabOrder := 1;
ZVDateTimePickerMax.TabOrder := 2;
ZVDateTimePicker1.TabOrder := 3;
for I := 0 to ControlCount - 1 do begin
Controls[I].Anchors := [];
Controls[I].AutoSize := True;
end;
ZVDateTimePickerMax.OnExit := @ZVDateTimePickerMaxExit;
ZVDateTimePickerMin.OnExit := @ZVDateTimePickerMinExit;
ZVDateTimePicker1.OnExit := @ZVDateTimePicker1Exit;
ZVDateTimePicker1.OnEnter := @ZVDateTimePicker1Enter;
ZVDateTimePickerMin.OnChange := @ZVDateTimePickersChange;
ZVDateTimePickerMax.OnChange := @ZVDateTimePickersChange;
ZVDateTimePicker1.OnChange := @ZVDateTimePickersChange;
OnActivate := @FormActivate;
end;
destructor TFormZVDateTimePickerEditor.Destroy;
begin
OnActivate := nil;
OnShow := nil;
ZVDateTimePicker1.OnChange := nil;
ZVDateTimePickerMax.OnChange := nil;
ZVDateTimePickerMin.OnChange := nil;
ZVDateTimePicker1.OnEnter := nil;
ZVDateTimePicker1.OnExit := nil;
ZVDateTimePickerMin.OnExit := nil;
ZVDateTimePickerMax.OnExit := nil;
ButtonPanel.Free;
LabelNull.Free;
LabelMax.Free;
LabelMin.Free;
Label1.Free;
ZVDateTimePicker1.Free;
ZVDateTimePickerMin.Free;
ZVDateTimePickerMax.Free;
inherited Destroy;
end;
{ TZVDateTimePickerDateTimePropEditor }
function TZVDateTimePickerDateTimePropEditor.GetAttributes: TPropertyAttributes;
begin
Result := inherited GetAttributes + [paDialog];
end;
function TZVDateTimePickerDateTimePropEditor.AllEqual: Boolean;
var
DT: TDateTime;
N: Integer;
begin
Result := True;
N := PropCount;
if N > 1 then begin
DT := TDateTime(GetFloatValue);
repeat
Dec(N);
Result := EqualDateTime(DT, TDateTime(GetFloatValueAt(N)));
until not(Result and (N > 1));
end;
end;
function TZVDateTimePickerDateTimePropEditor.GetValue: string;
var
DT: TDateTime;
S: String;
begin
DT := TDateTime(GetFloatValue);
if IsNullDate(DT) then
Result := 'NULL'
else begin
S := UpperCase(GetPropType^.Name);
if S = 'TDATE' then
Result := DateToStr(DT)
else if S = 'TTIME' then
Result := TimeToStr(DT)
else
Result := DateTimeToStr(DT);
end;
end;
procedure TZVDateTimePickerDateTimePropEditor.SetValue(const Value: string);
var
S: String;
begin
S := Trim(Value);
if (S > '') and (UpCase(S[1]) <> 'N') then begin
S := UpperCase(GetPropType^.Name);
if S = 'TDATE' then
SetFloatValue(StrToDate(Value))
else if S = 'TTIME' then
SetFloatValue(StrToTime(Value))
else
inherited SetValue(Value);
end else
SetFloatValue(NullDate);
end;
procedure TZVDateTimePickerDateTimePropEditor.Edit;
var
F: TFormZVDateTimePickerEditor;
I: Integer;
DT: TZVDateTimePicker;
begin
for I := 0 to PropCount - 1 do
if not (GetComponent(I) is TZVDateTimePicker) then
Exit;
F := TFormZVDateTimePickerEditor.CreateNew(nil, 0);
try
F.Initialize(TZVDateTimePicker(GetComponent(0)), GetName, GetPropType^.Name);
if F.ShowModal = mrOK then begin
if F.Modified then begin
for I := 0 to PropCount - 1 do begin
DT := TZVDateTimePicker(GetComponent(I));
DT.MinDate := TheSmallestDate;
DT.MaxDate := F.ZVDateTimePickerMax.Date;
DT.MinDate := F.ZVDateTimePickerMin.Date;
DT.DateTime := F.ZVDateTimePicker1.DateTime;
end;
Modified;
GlobalDesignHook.RefreshPropertyValues;
end;
end;
finally
F.Free;
end;
end;
{ TSimpleDatePropEditor }
function TSimpleDatePropEditor.GetValue: string;
begin
Result := DateToStr(GetFloatValue);
end;
procedure TSimpleDatePropEditor.SetValue(const Value: string);
var
S: String;
begin
S := Trim(Value);
if (S > '') and (UpCase(S[1]) <> 'N') then
inherited SetValue(S);
end;
initialization
RegPropEdits;
RegisterComponentEditor(TZVDateTimePicker, TZVDateTimePickerComponentEditor);
end.