From b7f5c7b4af5ba31999c360e5c9815d2746dba6b5 Mon Sep 17 00:00:00 2001
From: wp_xxyyzz <wp_xxyyzz@8e941d3f-bd1b-0410-a28a-d453659cc2b4>
Date: Fri, 9 Aug 2019 21:03:29 +0000
Subject: [PATCH] jvcllaz: Fix JvTimeFrame demo crashing at program end from
 week view after date was scrolled into a date range without appointments.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@7110 8e941d3f-bd1b-0410-a28a-d453659cc2b4
---
 .../examples/JvTimeFramework/JvTimeFrameDemo.lpi     |  3 +++
 .../jvcllaz/examples/JvTimeFramework/tfmain.pas      |  5 ++++-
 .../jvcllaz/run/JvTimeFramework/jvtfmanager.pas      | 12 +++++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/components/jvcllaz/examples/JvTimeFramework/JvTimeFrameDemo.lpi b/components/jvcllaz/examples/JvTimeFramework/JvTimeFrameDemo.lpi
index c46480f19..a02554bbc 100644
--- a/components/jvcllaz/examples/JvTimeFramework/JvTimeFrameDemo.lpi
+++ b/components/jvcllaz/examples/JvTimeFramework/JvTimeFrameDemo.lpi
@@ -114,6 +114,9 @@
       <UnitOutputDirectory Value="lib\$(TargetCPU)-$(TargetOS)"/>
     </SearchPaths>
     <Linking>
+      <Debugging>
+        <UseHeaptrc Value="True"/>
+      </Debugging>
       <Options>
         <Win32>
           <GraphicApplication Value="True"/>
diff --git a/components/jvcllaz/examples/JvTimeFramework/tfmain.pas b/components/jvcllaz/examples/JvTimeFramework/tfmain.pas
index eb7a978e3..f32d5d906 100644
--- a/components/jvcllaz/examples/JvTimeFramework/tfmain.pas
+++ b/components/jvcllaz/examples/JvTimeFramework/tfmain.pas
@@ -385,12 +385,15 @@ end;
 procedure TMainForm.PrevDateButtonClick(Sender: TObject);
 begin
   JvTFDays1.PrevDate;
+  JvTFMonths1.DisplayDate := JvTFDays1.CurrentDate;
+  JvTFWeeks1.DisplayDate := JvTFDays1.CurrentDate;
 end;
 
 procedure TMainForm.NextDateButtonClick(Sender: TObject);
 begin
   JvTFDays1.NextDate;
   JvTFMonths1.DisplayDate := JvTFDays1.CurrentDate;
+  JvTFWeeks1.DisplayDate := JvTFDays1.CurrentDate;
 end;
 
 procedure TMainForm.GotoDatePickerChange(Sender: TObject);
@@ -398,7 +401,7 @@ begin
   // GotoDatePicker.OnCloseUp should also point to this handler
   JvTFDays1.GotoDate(GotoDatePicker.Date);
   JvTFWeeks1.DisplayDate := GotoDatePicker.Date;
-  JvTFWeeks1.DisplayDate := GotoDatePicker.Date;
+  JvTFMonths1.DisplayDate := GotoDatePicker.Date;
 end;
 
 procedure TMainForm.GotoDatePickerUserInput(Sender: TObject;
diff --git a/components/jvcllaz/run/JvTimeFramework/jvtfmanager.pas b/components/jvcllaz/run/JvTimeFramework/jvtfmanager.pas
index 00617f282..8bf9413da 100644
--- a/components/jvcllaz/run/JvTimeFramework/jvtfmanager.pas
+++ b/components/jvcllaz/run/JvTimeFramework/jvtfmanager.pas
@@ -4067,13 +4067,23 @@ procedure TJvTFControl.ReleaseSchedule(const SchedName: string;
 var
   SchedID: string;
 begin
+  if Assigned(ScheduleManager) then begin
+    SchedID := TJvTFScheduleManager.GetScheduleID(SchedName, SchedDate);
+    if FSchedules.IndexOf(SchedID) > -1 then
+      ScheduleManager.ReleaseSchedule(Self, SchedName, SchedDate)
+  end;
+
+{  wp:
+   original code - crashes sometimes at program end in GetScheduleID
+   when ScheduleManager is nil
+
   SchedID := TJvTFScheduleManager.GetScheduleID(SchedName, SchedDate);
   if FSchedules.IndexOf(SchedID) > -1 then
     if Assigned(ScheduleManager) then
       ScheduleManager.ReleaseSchedule(Self, SchedName, SchedDate)
     else
       raise EJvTFScheduleManagerError.CreateRes(@RsECouldNotReleaseSchedule);
-
+ }
 end;
 
 procedure TJvTFControl.ReleaseSchedules;