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mirror of https://github.com/salvadordf/CEF4Delphi.git synced 2024-12-14 09:42:54 +02:00
CEF4Delphi/demos/SimpleOSRBrowser/uSimpleOSRBrowser.pas
Salvador Diaz Fau d2dd8fe5c7 Added high DPI support in OSR demo
- Added high DPI support in OSR demo
- Added cef.inc files in all demos
- Fixed some function declarations in the render handler.
2017-07-28 12:47:57 +02:00

573 lines
20 KiB
ObjectPascal

// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 to embed a chromium-based
// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright © 2017 Salvador Díaz Fau. All rights reserved.
//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uSimpleOSRBrowser;
{$I cef.inc}
interface
uses
{$IFDEF DELPHI16_UP}
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls, Vcl.AppEvnts,
{$ELSE}
Windows, Messages, SysUtils, Variants, Classes,
Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls, AppEvnts,
{$ENDIF}
GR32_Image, // You need the Graphics32 components for this demo available at http://graphics32.org
uCEFChromium, uCEFTypes, uCEFInterfaces;
const
MINIBROWSER_CREATED = WM_APP + $100;
type
TForm1 = class(TForm)
NavControlPnl: TPanel;
chrmosr: TChromium;
AppEvents: TApplicationEvents;
Panel1: TPanel; // This is just a quick and dirty hack to receive some events that the PaintBox can't receive.
PaintBox: TPaintBox32;
ComboBox1: TComboBox;
Panel2: TPanel;
GoBtn: TButton;
procedure AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
procedure GoBtnClick(Sender: TObject);
procedure Panel1Enter(Sender: TObject);
procedure Panel1Exit(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure FormHide(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormAfterMonitorDpiChanged(Sender: TObject; OldDPI, NewDPI: Integer);
procedure PaintBoxClick(Sender: TObject);
procedure PaintBoxResize(Sender: TObject);
procedure PaintBoxMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure PaintBoxMouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
procedure PaintBoxMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
procedure PaintBoxMouseWheel(Sender: TObject; Shift: TShiftState; WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
procedure PaintBoxMouseLeave(Sender: TObject);
procedure chrmosrPaint(Sender: TObject; const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer);
procedure chrmosrCursorChange(Sender: TObject; const browser: ICefBrowser; cursor: HICON; cursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo);
procedure chrmosrGetViewRect(Sender: TObject; const browser: ICefBrowser; var rect: TCefRect; out Result: Boolean);
procedure chrmosrGetScreenPoint(Sender: TObject; const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer; out Result: Boolean);
procedure chrmosrGetScreenInfo(Sender: TObject; const browser: ICefBrowser; var screenInfo: TCefScreenInfo; out Result: Boolean);
procedure chrmosrPopupShow(Sender: TObject; const browser: ICefBrowser; show: Boolean);
procedure chrmosrPopupSize(Sender: TObject; const browser: ICefBrowser; const rect: PCefRect);
procedure chrmosrAfterCreated(Sender: TObject; const browser: ICefBrowser);
private
function getModifiers(Shift: TShiftState): TCefEventFlags;
function GetButton(Button: TMouseButton): TCefMouseButtonType;
procedure WMMove(var aMessage : TWMMove); message WM_MOVE;
procedure WMMoving(var aMessage : TMessage); message WM_MOVING;
procedure WMCaptureChanged(var aMessage : TMessage); message WM_CAPTURECHANGED;
procedure WMCancelMode(var aMessage : TMessage); message WM_CANCELMODE;
procedure BrowserCreatedMsg(var aMessage : TMessage); message MINIBROWSER_CREATED;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses
uCEFMiscFunctions, uCEFConstants, uCEFApplication;
procedure TForm1.AppEventsMessage(var Msg: tagMSG; var Handled: Boolean);
var
TempEvent : TCefKeyEvent;
begin
case Msg.message of
WM_SYSCHAR :
if (Panel1.Focused or chrmosr.FrameIsFocused) and
(Msg.wParam in [VK_BACK..VK_HELP]) then
begin
TempEvent.kind := KEYEVENT_CHAR;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(True);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
WM_SYSKEYDOWN :
if (Panel1.Focused or chrmosr.FrameIsFocused) and
(Msg.wParam in [VK_BACK..VK_HELP]) then
begin
TempEvent.kind := KEYEVENT_RAWKEYDOWN;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(True);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
WM_SYSKEYUP :
if (Panel1.Focused or chrmosr.FrameIsFocused) and
(Msg.wParam in [VK_BACK..VK_HELP]) then
begin
TempEvent.kind := KEYEVENT_KEYUP;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(True);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
WM_KEYDOWN :
if (Panel1.Focused or chrmosr.FrameIsFocused) and
(Msg.wParam in [VK_BACK..VK_HELP]) then
begin
TempEvent.kind := KEYEVENT_RAWKEYDOWN;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(False);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
WM_KEYUP :
if (Panel1.Focused or chrmosr.FrameIsFocused) and
(Msg.wParam in [VK_BACK..VK_HELP]) then
begin
TempEvent.kind := KEYEVENT_KEYUP;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(False);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
WM_CHAR :
if Panel1.Focused or chrmosr.FrameIsFocused then
begin
TempEvent.kind := KEYEVENT_CHAR;
TempEvent.modifiers := GetCefKeyboardModifiers(Msg.wParam, Msg.lParam);
TempEvent.windows_key_code := Msg.wParam;
TempEvent.native_key_code := Msg.lParam;
TempEvent.is_system_key := ord(False);
TempEvent.character := #0;
TempEvent.unmodified_character := #0;
TempEvent.focus_on_editable_field := ord(False);
chrmosr.SendKeyEvent(@TempEvent);
Handled := True;
end;
end;
end;
procedure TForm1.GoBtnClick(Sender: TObject);
begin
chrmosr.LoadURL(ComboBox1.Text);
end;
procedure TForm1.chrmosrAfterCreated(Sender: TObject; const browser: ICefBrowser);
begin
PostMessage(Handle, MINIBROWSER_CREATED, 0, 0);
end;
procedure TForm1.chrmosrCursorChange(Sender : TObject;
const browser : ICefBrowser;
cursor : HICON;
cursorType : TCefCursorType;
const customCursorInfo : PCefCursorInfo);
begin
PaintBox.Cursor := GefCursorToWindowsCursor(cursorType);
end;
procedure TForm1.chrmosrGetScreenInfo(Sender: TObject;
const browser: ICefBrowser; var screenInfo: TCefScreenInfo;
out Result: Boolean);
var
TempRect : TCEFRect;
begin
if (GlobalCEFApp <> nil) then
begin
TempRect.x := 0;
TempRect.y := 0;
TempRect.width := DeviceToLogical(PaintBox.Width, GlobalCEFApp.DeviceScaleFactor);
TempRect.height := DeviceToLogical(PaintBox.Height, GlobalCEFApp.DeviceScaleFactor);
screenInfo.device_scale_factor := GlobalCEFApp.DeviceScaleFactor;
screenInfo.depth := 0;
screenInfo.depth_per_component := 0;
screenInfo.is_monochrome := Ord(False);
screenInfo.rect := TempRect;
screenInfo.available_rect := TempRect;
Result := True;
end
else
Result := False;
end;
procedure TForm1.chrmosrGetScreenPoint(Sender : TObject;
const browser : ICefBrowser;
viewX : Integer;
viewY : Integer;
var screenX : Integer;
var screenY : Integer;
out Result : Boolean);
var
TempScreenPt, TempViewPt : TPoint;
begin
if (GlobalCEFApp <> nil) then
begin
TempViewPt.x := LogicalToDevice(viewX, GlobalCEFApp.DeviceScaleFactor);
TempViewPt.y := LogicalToDevice(viewY, GlobalCEFApp.DeviceScaleFactor);
TempScreenPt := PaintBox.ClientToScreen(TempViewPt);
screenX := TempScreenPt.x;
screenY := TempScreenPt.y;
Result := True;
end
else
Result := False;
end;
procedure TForm1.chrmosrGetViewRect(Sender : TObject;
const browser : ICefBrowser;
var rect : TCefRect;
out Result : Boolean);
begin
if (GlobalCEFApp <> nil) then
begin
rect.x := 0;
rect.y := 0;
rect.width := DeviceToLogical(PaintBox.Width, GlobalCEFApp.DeviceScaleFactor);
rect.height := DeviceToLogical(PaintBox.Height, GlobalCEFApp.DeviceScaleFactor);
Result := True;
end
else
Result := False;
end;
procedure TForm1.chrmosrPaint(Sender : TObject;
const browser : ICefBrowser;
kind : TCefPaintElementType;
dirtyRectsCount : NativeUInt;
const dirtyRects : PCefRectArray;
const buffer : Pointer;
width : Integer;
height : Integer);
var
src, dst: PByte;
offset, i, j, w: Integer;
begin
if (width <> PaintBox.Width) or (height <> PaintBox.Height) then Exit;
// ====================
// === WARNING !!!! ===
// ====================
// This is a simple and basic function that copies the buffer passed from
// CEF into the PaintBox canvas. If you have a high DPI monitor you may
// have rounding problems resulting in a black screen.
// CEF and this demo use a device_scale_factor to calculate screen logical
// and real sizes. If there's a rounding error CEF and this demo will have
// slightly different sizes and this function will exit.
// If you need to support high DPI, you'll have to use a better function
// to copy the buffer.
with PaintBox.Buffer do
begin
PaintBox.Canvas.Lock;
Lock;
try
for j := 0 to dirtyRectsCount - 1 do
begin
w := Width * 4;
offset := ((dirtyRects[j].y * Width) + dirtyRects[j].x) * 4;
src := @PByte(buffer)[offset];
dst := @PByte(Bits)[offset];
offset := dirtyRects[j].width * 4;
for i := 0 to dirtyRects[j].height - 1 do
begin
Move(src^, dst^, offset);
Inc(dst, w);
Inc(src, w);
end;
PaintBox.Flush(Rect(dirtyRects[j].x, dirtyRects[j].y,
dirtyRects[j].x + dirtyRects[j].width, dirtyRects[j].y + dirtyRects[j].height));
end;
finally
Unlock;
PaintBox.Canvas.Unlock;
end;
end;
end;
procedure TForm1.chrmosrPopupShow(Sender : TObject;
const browser : ICefBrowser;
show : Boolean);
begin
// TO DO : Needed to draw the "select" items
end;
procedure TForm1.chrmosrPopupSize(Sender : TObject;
const browser : ICefBrowser;
const rect : PCefRect);
begin
// TO DO : Needed to draw the "select" items
// The rect also needs to be converted.
// LogicalToDevice(rect, GlobalCEFApp.DeviceScaleFactor);
end;
function TForm1.getModifiers(Shift: TShiftState): TCefEventFlags;
begin
Result := EVENTFLAG_NONE;
if (ssShift in Shift) then Result := Result or EVENTFLAG_SHIFT_DOWN;
if (ssAlt in Shift) then Result := Result or EVENTFLAG_ALT_DOWN;
if (ssCtrl in Shift) then Result := Result or EVENTFLAG_CONTROL_DOWN;
if (ssLeft in Shift) then Result := Result or EVENTFLAG_LEFT_MOUSE_BUTTON;
if (ssRight in Shift) then Result := Result or EVENTFLAG_RIGHT_MOUSE_BUTTON;
if (ssMiddle in Shift) then Result := Result or EVENTFLAG_MIDDLE_MOUSE_BUTTON;
end;
function TForm1.GetButton(Button: TMouseButton): TCefMouseButtonType;
begin
case Button of
TMouseButton.mbRight : Result := MBT_RIGHT;
TMouseButton.mbMiddle : Result := MBT_MIDDLE;
else Result := MBT_LEFT;
end;
end;
procedure TForm1.WMMove(var aMessage : TWMMove);
begin
inherited;
if (chrmosr <> nil) then chrmosr.NotifyMoveOrResizeStarted;
end;
procedure TForm1.WMMoving(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.NotifyMoveOrResizeStarted;
end;
procedure TForm1.WMCaptureChanged(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.SendCaptureLostEvent;
end;
procedure TForm1.WMCancelMode(var aMessage : TMessage);
begin
inherited;
if (chrmosr <> nil) then chrmosr.SendCaptureLostEvent;
end;
procedure TForm1.BrowserCreatedMsg(var aMessage : TMessage);
begin
NavControlPnl.Enabled := True;
GoBtn.Click;
end;
procedure TForm1.FormAfterMonitorDpiChanged(Sender: TObject; OldDPI, NewDPI: Integer);
begin
if (chrmosr <> nil) then
begin
chrmosr.NotifyScreenInfoChanged;
chrmosr.WasResized;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
chrmosr.Options.BackgroundColor := CefColorSetARGB($FF, $FF, $FF, $FF); // opaque white background color
chrmosr.CreateBrowser(nil, '');
chrmosr.InitializeDragAndDrop(PaintBox);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
chrmosr.ShutdownDragAndDrop;
end;
procedure TForm1.FormHide(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
chrmosr.WasHidden(True);
end;
procedure TForm1.FormShow(Sender: TObject);
begin
chrmosr.WasHidden(False);
chrmosr.SendFocusEvent(True);
end;
procedure TForm1.PaintBoxClick(Sender: TObject);
begin
Panel1.SetFocus;
end;
procedure TForm1.PaintBoxMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
begin
if (GlobalCEFApp <> nil) then
begin
TempEvent.x := X;
TempEvent.y := Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseClickEvent(@TempEvent, GetButton(Button), False, 1);
end;
end;
procedure TForm1.PaintBoxMouseLeave(Sender: TObject);
var
TempEvent : TCefMouseEvent;
TempPoint : TPoint;
begin
if (GlobalCEFApp <> nil) then
begin
GetCursorPos(TempPoint);
TempPoint := PaintBox.ScreenToclient(TempPoint);
TempEvent.x := TempPoint.x;
TempEvent.y := TempPoint.y;
TempEvent.modifiers := GetCefMouseModifiers;
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseMoveEvent(@TempEvent, not PaintBox.MouseInControl);
end;
end;
procedure TForm1.PaintBoxMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
begin
if (GlobalCEFApp <> nil) then
begin
TempEvent.x := X;
TempEvent.y := Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseMoveEvent(@TempEvent, not PaintBox.MouseInControl);
end;
end;
procedure TForm1.PaintBoxMouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
TempEvent : TCefMouseEvent;
begin
if (GlobalCEFApp <> nil) then
begin
TempEvent.x := X;
TempEvent.y := Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseClickEvent(@TempEvent, GetButton(Button), True, 1);
end;
end;
procedure TForm1.PaintBoxMouseWheel(Sender : TObject;
Shift : TShiftState;
WheelDelta : Integer;
MousePos : TPoint;
var Handled : Boolean);
var
TempEvent : TCefMouseEvent;
begin
if (GlobalCEFApp <> nil) then
begin
TempEvent.x := MousePos.X;
TempEvent.y := MousePos.Y;
TempEvent.modifiers := getModifiers(Shift);
DeviceToLogical(TempEvent, GlobalCEFApp.DeviceScaleFactor);
chrmosr.SendMouseWheelEvent(@TempEvent, 0, WheelDelta);
end;
end;
procedure TForm1.PaintBoxResize(Sender: TObject);
begin
PaintBox.Buffer.SetSize(PaintBox.Width, PaintBox.Height);
chrmosr.WasResized;
end;
procedure TForm1.Panel1Enter(Sender: TObject);
begin
chrmosr.SendFocusEvent(True);
end;
procedure TForm1.Panel1Exit(Sender: TObject);
begin
chrmosr.SendFocusEvent(False);
end;
end.