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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Windows.MouseManager;
interface
uses
Boolean,
Event,
Geometry._2d.Integer32.Point,
UserInterface.Control,
Windows.Control,
Windows.Gdi.Cursor;
type
TWindowsMouseTracker = class(TObject)
public
procedure Start(WindowsControl: TWindowsControl; Hover: TBoolean; Leave: TBoolean);
procedure Cancel(WindowsControl: TWindowsControl);
end;
TWindowsMouseManager = class(TMouseManager)
private
MouseTracker: TWindowsMouseTracker;
protected
procedure CaptureChanged(); override;
function LastChanceHandleEvent(RootControl: TControl; Event: TEvent): TBoolean; override;
public
constructor Create(); override;
destructor Destroy(); override;
function GetCursorPosition(): TInteger32Point; override;
procedure SetCursor(Cursor: TCursor); override;
end;
implementation
uses
Integer._16,
Integer._32.Positive,
UserInterface.Mouse.Event,
Windows.Api.UserInterface,
Windows.Api.UserInterface.Mouse;
{ TWindowsMouseManager }
constructor TWindowsMouseManager.Create();
begin
inherited Create();
MouseTracker := TWindowsMouseTracker.Create();
end;
destructor TWindowsMouseManager.Destroy();
begin
MouseTracker.Free();
inherited Destroy();
end;
function TWindowsMouseManager.GetCursorPosition(): TInteger32Point;
var
Value: TPositiveInteger32;
Top: TInteger16;
Left: TInteger16;
begin
Value := GetMessagePos();
Left := Value and $FFFF;
Top := (Value and $FFFF0000) shr 16;
Result := TInteger32Point.New(Left, Top);
end;
function TWindowsMouseManager.LastChanceHandleEvent(RootControl: TControl; Event: TEvent): TBoolean;
begin
Result := inherited LastChanceHandleEvent(RootControl, Event);
if (Event is TMouseMoveEvent) and (ControlWithCapture = nil) then
MouseTracker.Start(RootControl.RootOverlappedControl as TWindowsControl, False, True);
end;
procedure TWindowsMouseManager.SetCursor(Cursor: TCursor);
begin
Windows.Api.UserInterface.SetCursor(Cursor.Handle);
end;
procedure TWindowsMouseManager.CaptureChanged();
begin
if (ControlWithCapture <> nil) and (ControlWithCapture.RootOverlappedControl is TWindowsControl) then
Windows.Api.UserInterface.Mouse.SetCapture((ControlWithCapture.RootOverlappedControl as TWindowsControl).Handle)
else
Windows.Api.UserInterface.Mouse.ReleaseCapture();
end;
{ TWindowsMouseTracker }
procedure TWindowsMouseTracker.Cancel(WindowsControl: TWindowsControl);
var
Event: TTrackMouseEvent;
begin
Event.cbSize := SizeOf(Event);
Event.hwndTrack := WindowsControl.Handle;
Event.dwFlags := TME_CANCEL;
TrackMouseEvent(Event);
end;
procedure TWindowsMouseTracker.Start(WindowsControl: TWindowsControl; Hover, Leave: TBoolean);
var
Event: TTrackMouseEvent;
begin
Event.cbSize := SizeOf(Event);
Event.hwndTrack := WindowsControl.Handle;
Event.dwFlags := 0;
if Hover then
begin
Event.dwFlags := Event.dwFlags or TME_HOVER;
Event.dwHoverTime := HOVER_DEFAULT;
end;
if Leave then
Event.dwFlags := Event.dwFlags or TME_LEAVE;
TrackMouseEvent(Event);
end;
end.
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