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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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604 lines
19 KiB
ObjectPascal
604 lines
19 KiB
ObjectPascal
{ $Id$}
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{
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/***************************************************************************
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buttons.pp
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----------
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Component Library Code
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Initial Revision : Sun Mar 28 23:15:32 CST 1999
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Revised: Sat Jul 3 1999
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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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See the file COPYING.modifiedLGPL.txt, included in this distribution,
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for details about the license.
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*****************************************************************************
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}
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unit Buttons;
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{$mode objfpc}{$H+}
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interface
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{$ifdef Trace}
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{$ASSERTIONS ON}
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{$endif}
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uses
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Types, Classes, SysUtils, Math, LCLType, LCLProc, LCLIntf, LCLStrConsts,
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GraphType, Graphics, ImgList, ActnList, Controls, StdCtrls, LMessages, Forms,
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Themes, Menus{for ShortCut procedures}, LResources, ImageListCache;
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type
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TButtonLayout =
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(
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blGlyphLeft,
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blGlyphRight,
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blGlyphTop,
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blGlyphBottom
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);
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TButtonState =
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(
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bsUp, // button is up
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bsDisabled, // button disabled (grayed)
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bsDown, // button is down
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bsExclusive,// button is the only down in his group
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bsHot // button is under mouse
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);
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{
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TNumGlyphs holds the number of glyphs in an image.
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If we change this the code in SetNumGlyphs for @link(TCustomSpeedButton)
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needs to be changed
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}
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TNumGlyphs = 1..5;
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{ TButtonGlyph }
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TGlyphTransparencyMode = (
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gtmGlyph, // transparency is defined by the glyph itself (bitbtn)
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gtmOpaque, // transparent = false is defined by the owner (speedbutton)
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gtmTransparent // transparent = true
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);
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TButtonGlyph = class(TObject, IUnknown, IImageCacheListener)
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private
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FIsDesigning: Boolean;
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FShowMode: TGlyphShowMode;
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FImageIndexes: array[TButtonState] of Integer;
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FImages: TCustomImageList;
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FOriginal: TBitmap;
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FNumGlyphs: TNumGlyphs;
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FOnChange: TNotifyEvent;
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FImagesCache: TImageListCache;
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FTransparentMode: TGlyphTransparencyMode; // set by our owner to indicate that the glyphbitmap should be transparent
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function GetHeight: Integer;
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function GetWidth: Integer;
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procedure SetGlyph(Value: TBitmap);
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procedure SetNumGlyphs(Value: TNumGlyphs);
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procedure SetShowMode(const AValue: TGlyphShowMode);
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procedure ClearImages;
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public
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// IUnknown
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function QueryInterface(constref iid: TGuid; out obj): LongInt; {$IFDEF WINDOWS}stdcall{$ELSE}cdecl{$ENDIF};
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function _AddRef: LongInt; {$IFDEF WINDOWS}stdcall{$ELSE}cdecl{$ENDIF};
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function _Release: LongInt; {$IFDEF WINDOWS}stdcall{$ELSE}cdecl{$ENDIF};
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// IImageCacheListener
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procedure CacheSetImageList(AImageList: TCustomImageList);
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procedure CacheSetImageIndex(AIndex, AImageIndex: Integer);
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protected
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procedure GlyphChanged(Sender: TObject);
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procedure SetTransparentMode(AValue: TGlyphTransparencyMode);
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property TransparentMode: TGlyphTransparencyMode read FTransparentMode;
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public
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constructor Create;
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destructor Destroy; override;
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procedure GetImageIndexAndEffect(State: TButtonState; out AIndex: Integer; out AEffect: TGraphicsDrawEffect);
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function Draw(Canvas: TCanvas; const Client: TRect; const Offset: TPoint;
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State: TButtonState; Transparent: Boolean;
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BiDiFlags: Longint): TRect;
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procedure Refresh;
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property Glyph: TBitmap read FOriginal write SetGlyph;
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property IsDesigning: Boolean read FIsDesigning write FIsDesigning;
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property NumGlyphs: TNumGlyphs read FNumGlyphs write SetNumGlyphs;
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property Images: TCustomImageList read FImages;
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property Width: Integer read GetWidth;
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property Height: Integer read GetHeight;
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property ShowMode: TGlyphShowMode read FShowMode write SetShowMode;
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public
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property OnChange: TNotifyEvent read FOnChange write FOnChange;
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end;
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{ TCustomBitBtn }
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// when adding items here, also update TBitBtn.GetCaptionOfKind
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TBitBtnKind = (bkCustom, bkOK, bkCancel, bkHelp, bkYes, bkNo,
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bkClose, bkAbort, bkRetry, bkIgnore, bkAll,
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bkNoToAll, bkYesToAll);
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TBitBtnKinds = set of TBitBtnKind;
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TCustomBitBtn = class(TCustomButton)
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private
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FDefaultCaption: Boolean;
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FKind: TBitBtnKind;
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FLayout: TButtonLayout;
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FMargin: integer;
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FSpacing: Integer;
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function GetGlyph: TBitmap;
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function GetGlyphShowMode: TGlyphShowMode;
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function GetNumGlyphs: Integer;
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function IsGlyphStored: Boolean;
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procedure SetGlyph(AValue: TBitmap);
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procedure SetGlyphShowMode(const AValue: TGlyphShowMode);
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procedure SetKind(AValue: TBitBtnKind);
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procedure SetLayout(AValue: TButtonLayout);
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procedure SetMargin(const AValue: integer);
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procedure SetNumGlyphs(AValue: Integer);
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procedure SetSpacing(AValue: Integer);
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procedure RealizeKind;
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//Return the caption associated with the aKind value.
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function GetCaptionOfKind(AKind: TBitBtnKind): String;
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protected
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FButtonGlyph: TButtonGlyph;
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class procedure WSRegisterClass; override;
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procedure ActionChange(Sender: TObject; CheckDefaults: Boolean); override;
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procedure GlyphChanged(Sender: TObject);
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procedure InitializeWnd; override;
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function IsCaptionStored: Boolean;
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procedure Loaded; override;
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procedure TextChanged; override;
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class function GetControlClassDefaultSize: TSize; override;
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procedure CMAppShowBtnGlyphChanged(var Message: TLMessage); message CM_APPSHOWBTNGLYPHCHANGED;
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public
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constructor Create(TheOwner: TComponent); override;
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destructor Destroy; override;
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procedure Click; override;
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procedure LoadGlyphFromResourceName(Instance: THandle; const AName: String);
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procedure LoadGlyphFromLazarusResource(const AName: String);
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procedure LoadGlyphFromStock(idButton: Integer);
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function CanShowGlyph: Boolean;
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public
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property Caption stored IsCaptionStored;
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property DefaultCaption: Boolean read FDefaultCaption write FDefaultCaption default False;
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property Glyph: TBitmap read GetGlyph write SetGlyph stored IsGlyphStored;
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property NumGlyphs: Integer read GetNumGlyphs write SetNumGlyphs default 1;
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property Kind: TBitBtnKind read FKind write SetKind default bkCustom;
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property Layout: TButtonLayout read FLayout write SetLayout default blGlyphLeft;
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property Margin: integer read FMargin write SetMargin default -1;
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property Spacing: Integer read FSpacing write SetSpacing default 4;
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property GlyphShowMode: TGlyphShowMode read GetGlyphShowMode write SetGlyphShowMode default gsmApplication;
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end;
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{ TBitBtn }
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{ To set custom bitbtn glyphs for the whole application, see below for
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GetDefaultBitBtnGlyph }
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TBitBtn = class(TCustomBitBtn)
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published
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property Action;
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property Align;
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property Anchors;
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property AutoSize;
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property BidiMode;
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property BorderSpacing;
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property Cancel;
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property Caption;
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property Color;
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property Constraints;
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property Default;
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property DefaultCaption;
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property Enabled;
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property Font;
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property Glyph;
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property GlyphShowMode;
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property Kind;
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property Layout;
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property Margin;
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property ModalResult;
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property NumGlyphs;
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property OnChangeBounds;
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property OnClick;
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property OnContextPopup;
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property OnDragDrop;
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property OnDragOver;
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property OnEndDrag;
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property OnEnter;
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property OnExit;
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property OnKeyDown;
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property OnKeyPress;
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property OnKeyUp;
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property OnMouseDown;
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property OnMouseEnter;
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property OnMouseLeave;
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property OnMouseMove;
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property OnMouseUp;
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property OnMouseWheel;
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property OnMouseWheelDown;
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property OnMouseWheelUp;
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property OnResize;
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property OnStartDrag;
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property OnUTF8KeyPress;
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property ParentBidiMode;
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property ParentFont;
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property ParentShowHint;
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property PopupMenu;
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property ShowHint;
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property Spacing;
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property TabOrder;
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property TabStop;
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property Visible;
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end;
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{ TSpeedButtonActionLink }
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TSpeedButtonActionLink = class(TControlActionLink)
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protected
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procedure AssignClient(AClient: TObject); override;
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procedure SetGroupIndex(Value: Integer); override;
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procedure SetChecked(Value: Boolean); override;
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public
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function IsCheckedLinked: Boolean; override;
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function IsGroupIndexLinked: Boolean; override;
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end;
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{ TCustomSpeedButton }
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TCustomSpeedButton = class(TGraphicControl)
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private
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FGlyph: TButtonGlyph;
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FGroupIndex: Integer;
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FLastDrawDetails: TThemedElementDetails;
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FLayout: TButtonLayout;
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FMargin: integer;
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FSpacing: integer;
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FShortcut: TShortCut;
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FShowAccelChar: boolean;
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FShowCaption: boolean;
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FAllowAllUp: Boolean;
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FDown: Boolean;
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FDownLoaded : Boolean;// value of Down set during loading
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FDragging: Boolean;
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FFlat: Boolean;
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FMouseInControl: Boolean;
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function GetGlyph: TBitmap;
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function IsGlyphStored: Boolean;
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procedure SetShowCaption(const AValue: boolean);
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procedure UpdateExclusive;
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function GetTransparent: Boolean;
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procedure SetAllowAllUp(Value: Boolean);
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procedure SetGlyph(Value: TBitmap);
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procedure SetLayout(const Value: TButtonLayout);
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procedure SetShowAccelChar(Value: boolean);
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procedure SetTransparent(const AValue: boolean);
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procedure CMButtonPressed(var Message: TLMessage); message CM_BUTTONPRESSED;
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procedure CMEnabledChanged(var Message: TLMessage); message CM_ENABLEDCHANGED;
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private
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procedure DoMouseUp(var Message: TLMMouse; Button: TMouseButton);
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procedure WMLButtonDown(Var Message: TLMLButtonDown); message LM_LBUTTONDOWN;
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procedure WMLButtonUp(var Message: TLMLButtonUp); message LM_LBUTTONUP;
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procedure WMLButtonDBLCLK(Var Message: TLMLButtonDblClk); message LM_LBUTTONDBLCLK;
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protected
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FState: TButtonState;
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class procedure WSRegisterClass; override;
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function GetNumGlyphs: Integer;
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procedure GlyphChanged(Sender: TObject);
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function DialogChar(var Message: TLMKey): boolean; override;
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procedure CalculatePreferredSize(var PreferredWidth,
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PreferredHeight: integer; WithThemeSpace: Boolean); override;
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procedure MeasureDraw(Draw: boolean; PaintRect: TRect;
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out PreferredWidth, PreferredHeight: integer);
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procedure MouseEnter; override;
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procedure MouseLeave; override;
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procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer); override;
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procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
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procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
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X, Y: Integer); override;
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procedure Paint; override;
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procedure PaintBackground(var PaintRect: TRect); virtual;
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procedure SetDown(Value: Boolean);
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procedure SetGroupIndex(const Value: Integer);
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procedure SetFlat(const Value: Boolean);
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procedure SetMargin(const Value: integer);
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procedure SetNumGlyphs(Value: integer);
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procedure SetSpacing(const Value: integer);
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procedure RealSetText(const Value: TCaption); override;
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procedure UpdateState(InvalidateOnChange: boolean); virtual;
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function GetDrawDetails: TThemedElementDetails; virtual;
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property MouseInControl: Boolean read FMouseInControl;
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procedure ActionChange(Sender: TObject; CheckDefaults: Boolean); override;
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function GetActionLinkClass: TControlActionLinkClass; override;
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class function GetControlClassDefaultSize: TSize; override;
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procedure Loaded; override;
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protected
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function GetGlyphSize(Drawing: boolean; PaintRect: TRect): TSize; virtual;
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function GetTextSize(Drawing: boolean; PaintRect: TRect): TSize; virtual;
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function DrawGlyph(ACanvas: TCanvas; const AClient: TRect; const AOffset: TPoint;
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AState: TButtonState; ATransparent: Boolean; BiDiFlags: Longint): TRect; virtual;
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public
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constructor Create(AOwner: TComponent); override;
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destructor Destroy; override;
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function FindDownButton: TCustomSpeedButton;
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procedure Click; override; // make Click public
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procedure LoadGlyphFromResourceName(Instance: THandle; const AName: String);
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procedure LoadGlyphFromLazarusResource(const AName: String);
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public
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property AllowAllUp: Boolean read FAllowAllUp write SetAllowAllUp default false;
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property Color default clBtnFace;
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property Down: Boolean read FDown write SetDown default false;
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property Flat: Boolean read FFlat write SetFlat default false;
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property Glyph: TBitmap read GetGlyph write SetGlyph stored IsGlyphStored;
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property GroupIndex: Integer read FGroupIndex write SetGroupIndex default 0;
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property Layout: TButtonLayout read FLayout write SetLayout default blGlyphLeft;
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property Margin: integer read FMargin write SetMargin default -1;
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property NumGlyphs: Integer read GetNumGlyphs write SetNumGlyphs default 1;
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property ShowAccelChar: boolean read FShowAccelChar write SetShowAccelChar default true;
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property ShowCaption: boolean read FShowCaption write SetShowCaption default true;
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property Spacing: integer read FSpacing write SetSpacing default 4;
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property Transparent: Boolean read GetTransparent write SetTransparent default true;
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end;
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{ TSpeedButton }
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TSpeedButton = class(TCustomSpeedButton)
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published
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property Action;
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property Align;
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property AllowAllUp;
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property Anchors;
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property AutoSize;
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property BidiMode;
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property BorderSpacing;
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property Constraints;
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property Caption;
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property Color;
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property Down;
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property Enabled;
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property Flat;
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property Font;
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property Glyph;
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property GroupIndex;
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property Layout;
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property Margin;
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property NumGlyphs;
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property Spacing;
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property Transparent;
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property Visible;
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property OnClick;
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property OnDblClick;
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property OnMouseDown;
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property OnMouseEnter;
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property OnMouseLeave;
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property OnMouseMove;
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property OnMouseUp;
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property OnMouseWheel;
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property OnMouseWheelDown;
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property OnMouseWheelUp;
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property OnPaint;
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property OnResize;
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property OnChangeBounds;
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property ShowCaption;
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property ShowHint;
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property ParentBidiMode;
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property ParentFont;
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property ParentShowHint;
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property PopupMenu;
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end;
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{ To override the default TBitBtn glyphs set GetDefaultBitBtnGlyph below.
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Example:
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function GetBitBtnGlyph(Kind: TBitBtnKind): TBitmap;
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begin
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if Kind in [bkOK, bkCancel] then begin
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Result:=TBitmap.Create;
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case Kind of
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bkOk: Result.Assign(MyOkGlyph);
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bkCancel: Result.Assign(MyCancelGlyph);
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end;
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end else
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Result:=nil;
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end;
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}
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type
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TGetDefaultBitBtnGlyph = function(Kind: TBitBtnKind; var Handled: Boolean): TBitmap;
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var
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GetDefaultBitBtnGlyph: TGetDefaultBitBtnGlyph = nil;
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function GetLCLDefaultBtnGlyph(Kind: TBitBtnKind): TGraphic;
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procedure LoadGlyphFromResourceName(AGlyph: TButtonGlyph; Instance: THandle; const AName: String);
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procedure LoadGlyphFromLazarusResource(AGlyph: TButtonGlyph; const AName: String);
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procedure LoadGlyphFromStock(AGlyph: TButtonGlyph; idButton: Integer);
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// helper functions (search LCLType for idButton)
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function GetButtonCaption(idButton: Integer): String;
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function GetDefaultButtonIcon(idButton: Integer): TCustomBitmap;
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function GetButtonIcon(idButton: Integer): TCustomBitmap;
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function BidiAdjustButtonLayout(IsRightToLeft: Boolean; Layout: TButtonLayout): TButtonLayout;
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function dbgs(Kind: TBitBtnKind): string; overload;
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procedure Register;
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const
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BitBtnModalResults: array[TBitBtnKind] of TModalResult = (
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0, mrOK, mrCancel, 0, mrYes, mrNo,
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mrClose, mrAbort, mrRetry, mrIgnore, mrAll,
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mrNoToAll, mrYesToAll);
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BitBtnImages: array[TBitBtnKind] of Longint = (
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idButtonBase, idButtonOk, idButtonCancel, idButtonHelp, idButtonYes,
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idButtonNo, idButtonClose, idButtonAbort, idButtonRetry, idButtonIgnore,
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idButtonAll, idButtonNoToAll, idButtonYesToAll);
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BitBtnResNames: array[idButtonOk..idButtonNoToAll] of String =
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(
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{idButtonOk } 'btn_ok',
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{idButtonCancel } 'btn_cancel',
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{idButtonHelp } 'btn_help',
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{idButtonYes } 'btn_yes',
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{idButtonNo } 'btn_no',
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{idButtonClose } 'btn_close',
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{idButtonAbort } 'btn_abort',
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{idButtonRetry } 'btn_retry',
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{idButtonIgnore } 'btn_ignore',
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{idButtonAll } 'btn_all',
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{idButtonYesToAll} 'btn_all',
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{idButtonNoToAll } 'btn_no'
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);
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implementation
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{$R btn_icons.res}
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uses
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WSButtons;
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function GetLCLDefaultBtnGlyph(Kind: TBitBtnKind): TGraphic;
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begin
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Result := GetDefaultButtonIcon(BitBtnImages[Kind]);
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end;
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function GetDefaultButtonIcon(idButton: Integer): TCustomBitmap;
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begin
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Result := nil;
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if (idButton < Low(BitBtnResNames)) or (idButton > High(BitBtnResNames)) then
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Exit;
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if BitBtnResNames[idButton] = '' then
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Exit;
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Result := TPortableNetworkGraphic.Create;
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Result.LoadFromResourceName(hInstance, BitBtnResNames[idButton]);
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end;
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procedure LoadGlyphFromResourceName(AGlyph: TButtonGlyph; Instance: THandle; const AName: String);
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var
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C: TCustomBitmap;
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begin
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if AName = '' then
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C := nil
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else
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C := CreateBitmapFromResourceName(Instance, AName);
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try
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AGlyph.Glyph.Assign(C);
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finally
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C.Free;
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end;
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end;
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procedure LoadGlyphFromLazarusResource(AGlyph: TButtonGlyph; const AName: String);
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var
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C: TCustomBitmap;
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begin
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if AName = '' then
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C := nil
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else
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C := CreateBitmapFromLazarusResource(AName);
|
|
|
|
try
|
|
AGlyph.Glyph.Assign(C);
|
|
finally
|
|
C.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure LoadGlyphFromStock(AGlyph: TButtonGlyph; idButton: Integer);
|
|
var
|
|
C: TCustomBitmap;
|
|
begin
|
|
C := GetButtonIcon(idButton);
|
|
try
|
|
AGlyph.Glyph.Assign(C);
|
|
finally
|
|
C.Free;
|
|
end;
|
|
end;
|
|
|
|
function GetButtonCaption(idButton: Integer): String;
|
|
begin
|
|
case idButton of
|
|
idButtonOk : Result := rsmbOK;
|
|
idButtonCancel : Result := rsmbCancel;
|
|
idButtonHelp : Result := rsmbHelp;
|
|
idButtonYes : Result := rsmbYes;
|
|
idButtonNo : Result := rsmbNo;
|
|
idButtonClose : Result := rsmbClose;
|
|
idButtonAbort : Result := rsmbAbort;
|
|
idButtonRetry : Result := rsmbRetry;
|
|
idButtonIgnore : Result := rsmbIgnore;
|
|
idButtonAll : Result := rsmbAll;
|
|
idButtonYesToAll : Result := rsmbYesToAll;
|
|
idButtonNoToAll : Result := rsmbNoToAll;
|
|
idButtonOpen : Result := rsmbOpen;
|
|
idButtonSave : Result := rsmbSave;
|
|
idButtonShield : Result := rsmbUnlock;
|
|
else
|
|
Result := '?';
|
|
end;
|
|
end;
|
|
|
|
function GetButtonIcon(idButton: Integer): TCustomBitmap;
|
|
var
|
|
BitmapHandle, MaskHandle: HBitmap;
|
|
begin
|
|
if ThemeServices.GetStockImage(idButton, BitmapHandle, MaskHandle) then
|
|
begin
|
|
Result := TBitmap.Create;
|
|
Result.Handle := BitmapHandle;
|
|
if MaskHandle <> 0 then
|
|
Result.MaskHandle := MaskHandle;
|
|
end
|
|
else
|
|
Result := GetDefaultButtonIcon(idButton);
|
|
end;
|
|
|
|
const
|
|
BtnBidiLayout: array[Boolean, TButtonLayout] of TButtonLayout =
|
|
(
|
|
(
|
|
blGlyphLeft,
|
|
blGlyphRight,
|
|
blGlyphTop,
|
|
blGlyphBottom
|
|
),
|
|
(
|
|
blGlyphRight,
|
|
blGlyphLeft,
|
|
blGlyphTop,
|
|
blGlyphBottom
|
|
)
|
|
);
|
|
|
|
function BidiAdjustButtonLayout(IsRightToLeft: Boolean; Layout: TButtonLayout): TButtonLayout;
|
|
begin
|
|
Result := BtnBidiLayout[IsRightToLeft, Layout];
|
|
end;
|
|
|
|
function dbgs(Kind: TBitBtnKind): string;
|
|
begin
|
|
Result:='';
|
|
writestr(Result,Kind);
|
|
end;
|
|
|
|
procedure Register;
|
|
begin
|
|
RegisterComponents('Additional',[TBitBtn,TSpeedButton]);
|
|
end;
|
|
|
|
{$I bitbtn.inc}
|
|
{$I buttonglyph.inc}
|
|
{$I speedbutton.inc}
|
|
|
|
end.
|