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{
LCLCalWrapper
- - - - - - - - - - - - - - - - -
Author: Zoran Vučenović
Зоран Вученовић
This unit is part of DateTimeCtrls package for Lazarus.
TLCLCalendarWrapper is the default implementation of TCalendarControlWrapper
abstract class, used by DateTimePicker. Wraps LCL's TCalendar.
-----------------------------------------------------------
LICENCE
- - - -
Modified LGPL -- see the file COPYING.modifiedLGPL.
-----------------------------------------------------------
NO WARRANTY
- - - - - -
There is no warranty whatsoever.
-----------------------------------------------------------
BEST REGARDS TO LAZARUS COMMUNITY!
- - - - - - - - - - - - - - - - - -
I do hope the DateTimeCtrls package will be useful.
}
unit lclcalwrapper;
{$mode objfpc}{$H+}
interface
uses
Classes, Controls, Calendar, CalControlWrapper, LMessages;
type
{ TLCLCalendarWrapper }
TLCLCalendarWrapper = class(TCalendarControlWrapper)
private
PrevCalendarWndProc: TWndMethod;
CanClose: Boolean;
procedure LCLCalendarWrapperWndProc(var TheMessage: TLMessage);
public
class function GetCalendarControlClass: TControlClass; override;
procedure SetDate(Date: TDate); override;
function GetDate: TDate; override;
function AreCoordinatesOnDate(X, Y: Integer): Boolean; override;
constructor Create; override;
destructor Destroy; override;
end;
implementation
{ TLCLCalendarWrapper }
procedure TLCLCalendarWrapper.LCLCalendarWrapperWndProc(
var TheMessage: TLMessage);
begin
if TheMessage.msg = LM_LBUTTONDOWN then
CanClose := TCalendar(GetCalendarControl).GetCalendarView = cvMonth;
if Assigned(PrevCalendarWndProc) then
PrevCalendarWndProc(TheMessage);
end;
class function TLCLCalendarWrapper.GetCalendarControlClass: TControlClass;
begin
Result := TCalendar;
end;
procedure TLCLCalendarWrapper.SetDate(Date: TDate);
begin
TCalendar(GetCalendarControl).DateTime := Date;
end;
function TLCLCalendarWrapper.GetDate: TDate;
begin
Result := TCalendar(GetCalendarControl).DateTime;
end;
function TLCLCalendarWrapper.AreCoordinatesOnDate(X, Y: Integer): Boolean;
begin
Result :=
CanClose and
(TCalendar(GetCalendarControl).GetCalendarView = cvMonth) and
(TCalendar(GetCalendarControl).HitTest(Point(X, Y)) in [cpDate, cpNoWhere]);
CanClose := True;
end;
constructor TLCLCalendarWrapper.Create;
begin
inherited Create;
CanClose := True;
PrevCalendarWndProc := GetCalendarControl.WindowProc;
GetCalendarControl.WindowProc := @LCLCalendarWrapperWndProc;
end;
destructor TLCLCalendarWrapper.Destroy;
begin
GetCalendarControl.WindowProc := PrevCalendarWndProc;
inherited Destroy;
end;
end.
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