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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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490 lines
16 KiB
ObjectPascal
490 lines
16 KiB
ObjectPascal
{ $Id$}
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{
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*****************************************************************************
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* QtWSDialogs.pp *
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* -------------- *
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* *
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* *
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*****************************************************************************
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*****************************************************************************
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* *
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* This file is part of the Lazarus Component Library (LCL) *
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* *
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* See the file COPYING.modifiedLGPL, included in this distribution, *
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* for details about the copyright. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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*****************************************************************************
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}
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unit QtWSDialogs;
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{$mode delphi}{$H+}
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interface
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uses
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// Libs
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{$ifdef USE_QT_4_3}
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qt43,
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{$else}
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qt4,
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{$endif}
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qtobjects, qtwidgets, qtproc,
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// RTL + LCL
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SysUtils, Classes, LCLType, Dialogs, Controls, Forms, Graphics,
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// Widgetset
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WSDialogs, WSLCLClasses;
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type
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{ TQtWSCommonDialog }
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TQtWSCommonDialog = class(TWSCommonDialog)
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private
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protected
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class function GetDialogParent(const ACommonDialog: TCommonDialog): QWidgetH;
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public
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class function CreateHandle(const ACommonDialog: TCommonDialog): THandle; override;
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class procedure DestroyHandle(const ACommonDialog: TCommonDialog); override;
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class procedure ShowModal(const ACommonDialog: TCommonDialog); override;
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end;
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{ TQtWSFileDialog }
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TQtWSFileDialog = class(TWSFileDialog)
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private
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protected
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class function GetQtFilterString(const AFileDialog: TFileDialog): WideString;
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class procedure UpdateProperties(const AFileDialog: TFileDialog; QtFileDialog: TQtFileDialog);
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public
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class function CreateHandle(const ACommonDialog: TCommonDialog): THandle; override;
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class procedure ShowModal(const ACommonDialog: TCommonDialog); override;
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end;
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{ TQtWSOpenDialog }
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TQtWSOpenDialog = class(TWSOpenDialog)
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private
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protected
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public
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end;
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{ TQtWSSaveDialog }
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TQtWSSaveDialog = class(TWSSaveDialog)
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private
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protected
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public
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end;
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{ TQtWSSelectDirectoryDialog }
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TQtWSSelectDirectoryDialog = class(TWSSelectDirectoryDialog)
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private
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protected
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public
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end;
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{ TQtWSColorDialog }
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TQtWSColorDialog = class(TWSColorDialog)
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private
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protected
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public
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class function CreateHandle(const ACommonDialog: TCommonDialog): THandle; override;
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class procedure ShowModal(const ACommonDialog: TCommonDialog); override;
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end;
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{ TQtWSColorButton }
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TQtWSColorButton = class(TWSColorButton)
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private
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protected
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public
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end;
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{ TQtWSFontDialog }
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TQtWSFontDialog = class(TWSFontDialog)
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private
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protected
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public
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class function CreateHandle(const ACommonDialog: TCommonDialog): THandle; override;
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class procedure ShowModal(const ACommonDialog: TCommonDialog); override;
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end;
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implementation
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const
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QtDialogCodeToModalResultMap: array[QDialogDialogCode] of TModalResult =
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(
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{QDialogRejected} mrCancel,
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{QDialogAccepted} mrOk
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);
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{ TQtWSCommonDialog }
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class function TQtWSCommonDialog.GetDialogParent(const ACommonDialog: TCommonDialog): QWidgetH;
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begin
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if ACommonDialog.Owner is TWinControl then
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Result := TQtWidget(TWinControl(ACommonDialog.Owner).Handle).Widget
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else
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if Assigned(Application.MainForm) then
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Result := TQtWidget(Application.MainForm.Handle).Widget
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else
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Result := nil;
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end;
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{------------------------------------------------------------------------------
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Function: TQtWSCommonDialog.CreateHandle
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Params: None
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Returns: Nothing
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Dummy handle creator. On Qt we don<6F>t need a Handle for common dialogs
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------------------------------------------------------------------------------}
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class function TQtWSCommonDialog.CreateHandle(const ACommonDialog: TCommonDialog): THandle;
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begin
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Result := THandle(TQtDialog.Create(ACommonDialog, GetDialogParent(ACommonDialog)));
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TQtDialog(Result).AttachEvents;
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end;
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{------------------------------------------------------------------------------
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Function: TQtWSCommonDialog.DestroyHandle
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Params: None
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Returns: Nothing
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Dummy handle destructor. On Qt we don<6F>t need a Handle for common dialogs
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------------------------------------------------------------------------------}
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class procedure TQtWSCommonDialog.DestroyHandle(const ACommonDialog: TCommonDialog);
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begin
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TQtDialog(ACommonDialog.Handle).Release;
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end;
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class procedure TQtWSCommonDialog.ShowModal(const ACommonDialog: TCommonDialog);
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begin
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TQtDialog(ACommonDialog.Handle).exec;
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end;
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{ TQtWSFileDialog }
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class function TQtWSFileDialog.GetQtFilterString(const AFileDialog: TFileDialog): WideString;
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function GetExtensionString(ASource: String; AStart, ALength: Integer): String; inline;
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begin
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// replace *.ext1, *.ext2 by *.ext1 *.ext2
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Result := '(' + StringReplace(Copy(ASource, AStart, ALength), ';', ' ', [rfReplaceAll]) + ')';
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end;
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var
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TmpFilter, strExtensions: string;
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ParserState, Position, i: Integer;
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begin
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{------------------------------------------------------------------------------
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This is a parser that converts LCL filter strings to Qt filter strings
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The parses states are:
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0 - Initial state, is reading a string to be displayed on the filter
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1 - Is reading the extensions to be filtered
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2 - Reached the end of extensions text, now it will write
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A LCL filter string looks like this:
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Text files (*.txt *.pas)|*.txt *.pas|Binaries (*.exe)|*.exe
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And a Qt filter string looks like this
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Text files (*.txt *.pas)
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Binaries (*.exe)
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The following LCL filter simply cannot be represented under Qt, because Qt
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always appends a string with the extensions on the combo box
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Text files|*.txt *.pas|Binaries|*.exe
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To solve this this algorithm will try to find (*.txt) or similar on the display text
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and will remove it. This algorithm is far from perfect and may cause trouble on some
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special cases, but should work 99% of the time.
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------------------------------------------------------------------------------}
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ParserState := 0;
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Position := 1;
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TmpFilter := '';
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for i := 1 to Length(AFileDialog.Filter) do
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begin
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if Copy(AFileDialog.Filter, i, 1) = '|' then
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begin
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ParserState := ParserState + 1;
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if ParserState = 1 then
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TmpFilter := TmpFilter + Copy(AFileDialog.Filter, Position, i - Position)
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else
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if ParserState = 2 then
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begin
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strExtensions := GetExtensionString(AFileDialog.Filter, Position, i - Position);
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if Pos(strExtensions, TmpFilter) = 0 then
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TmpFilter := TmpFilter + ' ' + strExtensions;
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TmpFilter := TmpFilter + ';;';
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ParserState := 0;
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end;
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if i <> Length(AFileDialog.Filter) then
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Position := i + 1;
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end;
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end;
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strExtensions := GetExtensionString(AFileDialog.Filter, Position, i + 1 - Position);
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if Pos(strExtensions, TmpFilter) = 0 then
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TmpFilter := TmpFilter + ' ' + strExtensions;
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if (AFileDialog is TSaveDialog) and (trim(TmpFilter)='()') then
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Result := ''
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else
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Result := GetUtf8String(TmpFilter);
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end;
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class procedure TQtWSFileDialog.UpdateProperties(
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const AFileDialog: TFileDialog; QtFileDialog: TQtFileDialog);
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var
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ATitle: WideString;
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begin
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ATitle := GetUtf8String(AFileDialog.Title);
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QtFileDialog.setWindowTitle(@ATitle);
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QtFileDialog.setDirectory(GetUtf8String(AFileDialog.InitialDir));
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QtFileDialog.setFilter(GetQtFilterString(AFileDialog));
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QtFileDialog.setConfirmOverwrite(ofOverwritePrompt in TOpenDialog(AFileDialog).Options);
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QtFileDialog.setReadOnly(ofReadOnly in TOpenDialog(AFileDialog).Options);
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QtFileDialog.setSizeGripEnabled(ofEnableSizing in TOpenDialog(AFileDialog).Options);
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if ofViewDetail in TOpenDialog(AFileDialog).Options then
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QtFileDialog.setViewMode(QFileDialogDetail)
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else
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QtFileDialog.setViewMode(QFileDialogList);
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if ofAllowMultiSelect in TOpenDialog(AFileDialog).Options then
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QtFileDialog.setFileMode(QFileDialogExistingFiles)
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else
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if ofFileMustExist in TOpenDialog(AFileDialog).Options then
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QtFileDialog.setFileMode(QFileDialogExistingFile)
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else
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QtFileDialog.setFileMode(QFileDialogAnyFile);
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end;
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class function TQtWSFileDialog.CreateHandle(const ACommonDialog: TCommonDialog): THandle;
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var
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FileDialog: TQtFileDialog;
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begin
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FileDialog := TQtFileDialog.Create(ACommonDialog, TQtWSCommonDialog.GetDialogParent(ACommonDialog));
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FileDialog.AttachEvents;
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Result := THandle(FileDialog);
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end;
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{------------------------------------------------------------------------------
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Function: TQtWSFileDialog.ShowModal
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Params: None
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Returns: Nothing
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------------------------------------------------------------------------------}
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class procedure TQtWSFileDialog.ShowModal(const ACommonDialog: TCommonDialog);
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var
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selectedFilter, ReturnText,
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saveFileName, saveTitle, saveFilter: WideString;
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FileDialog: TFileDialog;
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ReturnList: QStringListH;
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i: integer;
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QtFileDialog: TQtFileDialog;
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begin
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{------------------------------------------------------------------------------
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Initialization of variables
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------------------------------------------------------------------------------}
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ReturnText := '';
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selectedFilter := '';
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saveFileName := '';
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saveTitle := '';
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FileDialog := TFileDialog(ACommonDialog);
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QtFileDialog := TQtFileDialog(FileDialog.Handle);
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UpdateProperties(FileDialog, QtFileDialog);
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{------------------------------------------------------------------------------
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Code to call the dialog
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------------------------------------------------------------------------------}
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if FileDialog is TSaveDialog then
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QtFileDialog.setAcceptMode(QFileDialogAcceptSave)
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else
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if FileDialog is TOpenDialog then
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QtFileDialog.setAcceptMode(QFileDialogAcceptOpen)
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else
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if ACommonDialog is TSelectDirectoryDialog then
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QtFileDialog.setFileMode(QFileDialogDirectoryOnly);
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if ACommonDialog is TSaveDialog then
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begin
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saveFilter := GetQtFilterString(TSaveDialog(ACommonDialog));
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saveFileName := GetUtf8String(FileDialog.InitialDir+FileDialog.Filename);
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saveTitle := GetUTF8String(FileDialog.Title);
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QFileDialog_getSaveFileName(@ReturnText, QWidget_parentWidget(QtFileDialog.Widget), @SaveTitle, @saveFileName, @saveFilter, {selectedFilter} nil, 0);
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if ReturnText <> '' then
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begin
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FileDialog.FileName := UTF8Encode(ReturnText);
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FileDialog.UserChoice := mrOK;
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end else
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FileDialog.UserChoice := mrCancel;
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end else
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begin
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FileDialog.UserChoice := QtDialogCodeToModalResultMap[QDialogDialogCode(QtFileDialog.exec)];
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ReturnList := QStringList_create;
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try
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QtFileDialog.selectedFiles(ReturnList);
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for i := 0 to QStringList_size(ReturnList) - 1 do
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begin
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QStringList_at(ReturnList, @ReturnText, i);
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FileDialog.Files.Add(UTF8Encode(ReturnText));
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if i = 0 then
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FileDialog.FileName := UTF8Encode(ReturnText);
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end;
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ReturnText := FileDialog.Files.Text;
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finally
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QStringList_destroy(ReturnList);
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end;
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end;
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end;
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{ TQtWSColorDialog }
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class function TQtWSColorDialog.CreateHandle(const ACommonDialog: TCommonDialog): THandle;
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begin
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Result := 0;
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end;
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{------------------------------------------------------------------------------
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Function: TQtWSColorDialog.ShowModal
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Params: None
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Returns: Nothing
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------------------------------------------------------------------------------}
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class procedure TQtWSColorDialog.ShowModal(const ACommonDialog: TCommonDialog);
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var
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AColor: TColor;
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AQColor: TQColor;
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AQtColor: QColorH;
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ARgb: QRgb;
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ReturnBool: Boolean;
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begin
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AColor := ColorToRgb(TColorDialog(ACommonDialog).Color);
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AQColor.Alpha := $FFFF;
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AQColor.ColorSpec := 1;
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AQColor.Pad := 0;
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ColorRefToTQColor(AColor, AQColor);
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AQtColor := QColor_create(PQColor(@AQColor));
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ARgb := QColor_rgba(AQtColor);
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ARgb := QColorDialog_getRgba(ARgb, @ReturnBool,
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TQtWSCommonDialog.GetDialogParent(ACommonDialog));
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QColor_fromRgba(PQColor(AQtColor), ARgb);
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try
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QColor_toRgb(AQtColor, @AQColor);
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TQColorToColorRef(AQColor, AColor);
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TColorDialog(ACommonDialog).Color := AColor;
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finally
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QColor_destroy(AQtColor);
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end;
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if ReturnBool then
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ACommonDialog.UserChoice := mrOk
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else
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ACommonDialog.UserChoice := mrCancel;
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end;
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{ TQtWSFontDialog }
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class function TQtWSFontDialog.CreateHandle(const ACommonDialog: TCommonDialog
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): THandle;
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begin
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Result := 0;
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end;
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{------------------------------------------------------------------------------
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Function: TQtWSFontDialog.ShowModal
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Params: None
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Returns: Nothing
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------------------------------------------------------------------------------}
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class procedure TQtWSFontDialog.ShowModal(const ACommonDialog: TCommonDialog);
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var
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ReturnFont, CurrentFont: QFontH;
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ReturnBool: Boolean;
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Str: WideString;
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begin
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{------------------------------------------------------------------------------
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Code to call the dialog
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------------------------------------------------------------------------------}
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CurrentFont := TQtFont(TFontDialog(ACommonDialog).Font.Handle).Widget;
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ReturnFont := QFont_create;
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try
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QFontDialog_getFont(ReturnFont, @ReturnBool, CurrentFont,
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TQtWSCommonDialog.GetDialogParent(ACommonDialog));
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QFont_family(ReturnFont, @Str);
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TFontDialog(ACommonDialog).Font.Name := UTF8Encode(Str);
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TFontDialog(ACommonDialog).Font.Height := QFont_pointSize(ReturnFont);
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TFontDialog(ACommonDialog).Font.Style := [];
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if QFont_bold(ReturnFont) then
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TFontDialog(ACommonDialog).Font.Style := TFontDialog(ACommonDialog).Font.Style + [fsBold];
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if QFont_italic(ReturnFont) then
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TFontDialog(ACommonDialog).Font.Style := TFontDialog(ACommonDialog).Font.Style + [fsItalic];
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if QFont_strikeOut(ReturnFont) then
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TFontDialog(ACommonDialog).Font.Style := TFontDialog(ACommonDialog).Font.Style + [fsStrikeOut];
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if QFont_underline(ReturnFont) then
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TFontDialog(ACommonDialog).Font.Style := TFontDialog(ACommonDialog).Font.Style + [fsUnderline];
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if QFont_fixedPitch(ReturnFont) then
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TFontDialog(ACommonDialog).Font.Pitch := fpFixed
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else
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TFontDialog(ACommonDialog).Font.Pitch := fpDefault;
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finally
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QFont_destroy(ReturnFont);
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end;
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if ReturnBool then
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ACommonDialog.UserChoice := mrOk
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else
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ACommonDialog.UserChoice := mrCancel;
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end;
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initialization
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////////////////////////////////////////////////////
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// I M P O R T A N T
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////////////////////////////////////////////////////
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// To improve speed, register only classes
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// which actually implement something
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////////////////////////////////////////////////////
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RegisterWSComponent(TCommonDialog, TQtWSCommonDialog);
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RegisterWSComponent(TFileDialog, TQtWSFileDialog);
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// RegisterWSComponent(TOpenDialog, TQtWSOpenDialog);
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// RegisterWSComponent(TSaveDialog, TQtWSSaveDialog);
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// RegisterWSComponent(TSelectDirectoryDialog, TQtWSSelectDirectoryDialog);
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RegisterWSComponent(TColorDialog, TQtWSColorDialog);
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// RegisterWSComponent(TColorButton, TQtWSColorButton);
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RegisterWSComponent(TFontDialog, TQtWSFontDialog);
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////////////////////////////////////////////////////
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end.
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