jvqlistcomb.pas

East make Tray Icon in delphi

{******************************************************************************}
{* WARNING:  JEDI VCL To CLX Converter generated unit.                        *}
{*           Manual modifications will be lost on next release.               *}
{******************************************************************************}

{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvListComb.PAS, released on 2002-05-26.

The Initial Developer of the Original Code is Peter Th鰎nqvist [peter3 at sourceforge dot net]
Portions created by Peter Th鰎nqvist are Copyright (C) 2002 Peter Th鰎nqvist.
All Rights Reserved.

This is a merging of the original TJvListBox3 and TJvImageListBox
TJvListBox3 has been renamed TJvImageListBox and the original TJvImageListBox has been moved to \archive

Contributor(s):
S閎astien Buysse [sbuysse att buypin dott com]
Michael Beck [mbeck att bigfoot dott com]
Olivier Sannier [obones att altern dott org]

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.sourceforge.net

Description:
  A unit to allow display of bitmaps in TComboboxes and TListboxes

Known Issues:
-----------------------------------------------------------------------------}
// $Id: JvQListComb.pas,v 1.10 2005/02/06 14:06:14 asnepvangers Exp $

unit JvQListComb;

{$I jvcl.inc}

interface

uses 
  Qt, 
  QWindows, QMessages,
  SysUtils, Classes, QGraphics, QControls, QExtCtrls, QStdCtrls, QImgList,
  JvQJCLUtils, JvQComboBox, JvQComponent, JvQExControls, JvQExStdCtrls;

type
  TJvButtonColors = (fsLighter, fsLight, fsMedium, fsDark, fsDarker);
  TJvListPropertiesUsed = set of (puFont, puColorHighlight, puColorHighlightText);

const
  AllListPropertiesUsed = [puFont, puColorHighlight, puColorHighlightText];

type
  IJvResetItemHeight = interface
  ['{29F7C34D-F03C-41FE-8423-0388289A505B}']
    procedure ResetItemHeight;
  end;

  TJvImageItems = class;

  TJvImageItem = class(TCollectionItem)
  private
    FOwner: TJvImageItems;
    FImageIndex: Integer;
    FIndent: Integer;
    FListPropertiesUsed: TJvListPropertiesUsed;
    FFont: TFont;
    FColorHighlight: TColor;
    FColorHighlightText: TColor;
    FGlyph: TBitmap;
    FLinkedObject: TObject;
    FNoTextAssign: Boolean;
    procedure SetImageIndex(const Value: Integer);
    procedure SetText(const Value: string);
    procedure SetIndent(const Value: Integer);
    function GetWinControl: TWinControl;
    procedure Change;
    function GetText: string;
    function GetOwnerStrings: TStrings;
    function GetFont: TFont;
    function GetGlyph: TBitmap;
    procedure SetGlyph(const Value: TBitmap);
    procedure SetFont(const Value: TFont);
    function GetColorHighlight: TColor;
    function GetColorHighlightText: TColor;
    procedure SetColorHighlight(const Value: TColor);
    procedure SetColorHighlightText(const Value: TColor);
    function IsColorHighlightTextStored: Boolean;
    function IsColorHighlightStored: Boolean;
  protected
    procedure SetIndex(Value: Integer); override;
    function GetDisplayName: string; override;

    function IsFontStored: Boolean;
    procedure FontChange(Sender: TObject);
  public
    constructor Create(Collection: TCollection); override;
    destructor Destroy; override;
    procedure Assign(Source: TPersistent); override;
    property LinkedObject: TObject read FLinkedObject write FLinkedObject;
  published
    // ListPropertiesUsed must come before properties named the same
    // as in the list or the component will not be created
    // correctly when restored from a DFM stream.
    property ListPropertiesUsed: TJvListPropertiesUsed read FListPropertiesUsed write FListPropertiesUsed default AllListPropertiesUsed;
    property ColorHighlight: TColor read GetColorHighlight write SetColorHighlight stored IsColorHighlightStored default clHighlight ;
    property ColorHighlightText: TColor read GetColorHighlightText write SetColorHighlightText stored IsColorHighlightTextStored default clHighlightText;
    property Font: TFont read GetFont write SetFont stored IsFontStored;
    property Glyph: TBitmap read GetGlyph write SetGlyph stored True;
    property ImageIndex: Integer read FImageIndex write SetImageIndex default -1;
    property Indent: Integer read FIndent write SetIndent default 2;
    property Text: string read GetText write SetText;
  end;

  TJvImageItems = class(TOwnedCollection)
  private
    FStrings: TStrings;
    function GetItems(Index: Integer): TJvImageItem;
    procedure SetItems(Index: Integer; const Value: TJvImageItem);
    function GetObjects(Index: Integer): TObject;
    procedure SetObjects(Index: Integer; const Value: TObject);
  protected
    procedure Update(Item: TCollectionItem); override;
  public
    function Add: TJvImageItem; overload;
    function Add(const Text: string): Integer; overload;
    function Insert(Index: Integer): TJvImageItem; overload;
    procedure Insert(Index: Integer; const Text: string); overload;
    procedure Move(CurIndex, NewIndex: Integer);
    procedure Assign(Source: TPersistent); override;
    constructor Create(AOwner: TPersistent);
    property Items[Index: Integer]: TJvImageItem read GetItems write SetItems; default;
    property Objects[Index: Integer]: TObject read GetObjects write SetObjects;
  end;

  TJvImageComboBox = class(TJvCustomComboBox, IUnknown, IJvResetItemHeight)
  private
    FItems: TJvImageItems;
    FImageList: TCustomImageList;
    FDefaultIndent: Integer;
    FChangeLink: TChangeLink;
    FImageWidth: Integer;
    FImageHeight: Integer;
    FColorHighlight: TColor;
    FColorHighlightText: TColor;
    FOnChange: TNotifyEvent;
    FButtonFrame: Boolean;
    FButtonStyle: TJvButtonColors;
    FIndentSelected: Boolean;
    FDroppedWidth: Integer; 
    function GetDroppedWidth: Integer;
    procedure SetDroppedWidth(Value: Integer);
    procedure SetColorHighlight(Value: TColor);
    procedure SetColorHighlightText(Value: TColor);
    procedure SetImageList(Value: TCustomImageList);

    procedure ImageListChange(Sender: TObject);
    procedure SetDefaultIndent(const Value: Integer);
    procedure SetItems(const Value: TJvImageItems); reintroduce;
    procedure SetIndentSelected(const Value: Boolean);
    { IJvResetItemHeight }
    procedure ResetItemHeight;
  protected
    procedure FontChanged; override;
    procedure EnabledChanged; override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure RecreateWnd;
    procedure CreateWnd; override;  
    function DrawItem(Index: Integer; R: TRect; State: TOwnerDrawState): Boolean; override;
    procedure MeasureItem(Control: TWinControl; Item: QClxListBoxItemH;
                          var Height, Width: Integer); override;
    procedure SetParent(const AParent: TWidgetControl); override; 

    procedure Change; override;

    function GetImageWidth(Index: Integer): Integer;
    function GetImageHeight(Index: Integer): Integer;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override; 
    property Text;
  published
    property Align;
    property Color; 
    property DroppedWidth: Integer read GetDroppedWidth write SetDroppedWidth;
    property DragMode;
    property DropDownCount;
    property ImageHeight: Integer read FImageHeight write FImageHeight;
    property ImageWidth: Integer read FImageWidth write FImageWidth;
    property Items: TJvImageItems read FItems write SetItems;
    property IndentSelected: Boolean read FIndentSelected write SetIndentSelected default False;
    property ItemIndex;
    property DefaultIndent: Integer read FDefaultIndent write SetDefaultIndent default 0;
    property Enabled;
    property ButtonFrame: Boolean read FButtonFrame write FButtonFrame default False;
    property ButtonStyle: TJvButtonColors read FButtonStyle write FButtonStyle;
    property ColorHighlight: TColor read FColorHighlight write SetColorHighlight default clHighlight;
    property ColorHighlightText: TColor read FColorHighlightText write SetColorHighlightText default clHighlightText;
    property Font;
    property Images: TCustomImageList read FImageList write SetImageList;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Tag;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnChange: TNotifyEvent read FOnChange write FOnChange;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnDropDown;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnStartDrag;
  end;

  TJvImageListBox = class(TJvExCustomListBox, IUnknown, IJvResetItemHeight)
  private
    FImageList: TCustomImageList;
    FItems: TJvImageItems;
    FChangeLink: TChangeLink;
    FImageWidth: Integer;
    FImageHeight: Integer;
    FAlignment: TAlignment;
    FColorHighlight, FColorHighlightText: TColor;
    FButtonFrame: Boolean;
    FButtonStyle: TJvButtonColors; 
    procedure SetColorHighlight(Value: TColor);
    procedure SetColorHighlightText(Value: TColor);
    procedure SetImageList(Value: TCustomImageList);
    procedure SetAlignment(Value: TAlignment);
    procedure DrawLeftGlyph(Index: Integer; R: TRect; State: TOwnerDrawState);
    procedure DrawRightGlyph(Index: Integer; R: TRect; State: TOwnerDrawState);
    procedure DrawCenteredGlyph(Index: Integer; R: TRect; State: TOwnerDrawState);
    procedure SetItems(const Value: TJvImageItems);
    { IJvResetItemHeight }
    procedure ResetItemHeight;
  protected
    procedure FontChanged; override;
    procedure ImageListChange(Sender: TObject);
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;  
//    procedure CreateWidget; override;
    function DrawItem(Index: Integer; Rect: TRect; State: TOwnerDrawState):Boolean ; override;
    procedure MeasureItem(Control: TWinControl; Item: QClxListBoxItemH;
                          var Height, Width: Integer); override;
    procedure SetParent(const AParent: TWidgetControl); override; 
    procedure Resize; override;

    function GetImageWidth(Index: Integer): Integer;
    function GetImageHeight(Index: Integer): Integer;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override; 
  published
    property Anchors;
    property Align;
    property Alignment: TAlignment read FAlignment write SetAlignment default taLeftJustify;
    property BorderStyle;
    property Color;
    property DragMode; 
    property Enabled;
    property Font;
    property Items: TJvImageItems read FItems write SetItems;
    property ImageHeight: Integer read FImageHeight write FImageHeight;
    property ImageWidth: Integer read FImageWidth write FImageWidth;
    property ButtonFrame: Boolean read FButtonFrame write FButtonFrame default False;
    property ButtonStyle: TJvButtonColors read FButtonStyle write FButtonStyle;
    property ColorHighlight: TColor read FColorHighlight write SetColorHighlight default clHighlight;
    property ColorHighlightText: TColor read FColorHighlightText write SetColorHighlightText default clHighlightText;
    property Images: TCustomImageList read FImageList write SetImageList;
    property MultiSelect;
    property ItemHeight;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnStartDrag;
    property Sorted;
    property Tag;
  end;

implementation

uses
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  Math;

type
  TWinControlAccessProtected = class(TWinControl);

{ utility }

{
function DropArrowWidth: Integer;
begin
  Result := GetSystemMetrics(SM_CXVSCROLL);
end;
}


function GetItemHeight(Font: TFont): Integer;
var
  DC: HDC;
  SaveFont: HFont;
  Metrics: TTextMetric;
begin
  DC := GetDC(HWND_DESKTOP);
  SaveFont := SelectObject(DC, Font.Handle);
  GetTextMetrics(DC, Metrics);
  SelectObject(DC, SaveFont);
  ReleaseDC(HWND_DESKTOP, DC);
  Result := Metrics.tmHeight;
end;

// (rom) completely rewritten

procedure DrawBtnFrame(Canvas: TCanvas; ButtonStyle: TJvButtonColors; DefColor: TColor; Default: Boolean; R: TRect);
const
  TopStyles: array [TJvButtonColors] of TColor =
    (clBtnHighLight, clBtnHighLight, clBtnHighLight, clBtnFace, clBtnShadow);
  BottomStyles: array [TJvButtonColors] of TColor =
    (clBtnFace, clBtnShadow, cl3DDkShadow, cl3DDkShadow, cl3DDkShadow);
begin
  if Default then
    Frame3D(Canvas, R, DefColor, DefColor, 1)
  else
    Frame3D(Canvas, R, TopStyles[ButtonStyle], BottomStyles[ButtonStyle], 1);
end;

procedure TJvImageItem.Assign(Source: TPersistent);
begin
  if Source is TJvImageItem then
  begin
    if not FNoTextAssign then
      Text := TJvImageItem(Source).Text;
    FImageIndex := TJvImageItem(Source).ImageIndex;
    FIndent := TJvImageItem(Source).Indent;
    FLinkedObject := TJvImageItem(Source).LinkedObject;
    Glyph := TJvImageItem(Source).Glyph;
    FColorHighlight := TJvImageItem(Source).ColorHighlight;
    FColorHighlightText := TJvImageItem(Source).ColorHighlightText;
    if TJvImageItem(Source).FFont <> nil then
      Font := TJvImageItem(Source).Font
    else
      FreeAndNil(FFont);
    ListPropertiesUsed := TJvImageItem(Source).ListPropertiesUsed;
    Change;
  end
  else
    inherited Assign(Source);
end;

//=== { TJvImageItem } =======================================================

constructor TJvImageItem.Create(Collection: TCollection);
begin
  // FGlyph MUST be created before calling inherited or the
  // creation of the item from a stream (DFM for instance)
  // will not work correctly.
  FGlyph := TBitmap.Create;

  inherited Create(Collection);
  FOwner := Collection as TJvImageItems;
  FListPropertiesUsed := AllListPropertiesUsed;
  FFont := nil;
  FColorHighlight := clHighlight;
  FColorHighlightText := clHighlightText;
end;

destructor TJvImageItem.Destroy;
var
  S: TStrings;
begin
  S := GetOwnerStrings;
  // PRY 2002.06.04
  //if (S <> nil) and not (csDestroying in TComponent(FOwner.GetWinControl).ComponentState) then
  if (S <> nil) and not (csDestroying in GetWinControl.ComponentState) then
    S.Delete(Index);

  FFont.Free;
  FGlyph.Free;
  inherited Destroy;
end;

function TJvImageItem.GetDisplayName: string;
begin
  if Text = '' then
    Result := inherited GetDisplayName
  else
    Result := Text;
end;

procedure TJvImageItem.Change;
begin
  if Assigned(FOwner) then
    FOwner.Update(Self);
end;

procedure TJvImageItem.SetImageIndex(const Value: Integer);
begin
  if FImageIndex <> Value then
  begin
    FImageIndex := Value;
    Change;
  end;
end;

procedure TJvImageItem.SetIndent(const Value: Integer);
begin
  if FIndent <> Value then
  begin
    FIndent := Value;
    Change;
  end;
end;

function TJvImageItem.GetOwnerStrings: TStrings;
begin
  Result := nil;
  if Assigned(FOwner) then
    Result := FOwner.FStrings;
end;

procedure TJvImageItem.SetText(const Value: string);
var
  S: TStrings;
begin
  S := GetOwnerStrings;
  if S <> nil then
  begin
    while S.Count <= Index do
      S.Add('');
    if S[Index] <> Value then
    begin
      S[Index] := Value;
      Change;
    end;
  end;
end;

function TJvImageItem.GetText: string;
var
  S: TStrings;
begin
  Result := '';
  S := GetOwnerStrings;
  if S <> nil then
  begin
    while S.Count <= Index do
      S.Add('');
    Result := S[Index];
  end;
end;

procedure TJvImageItem.SetIndex(Value: Integer);
var
  I: Integer;
  S: TStrings;
begin
  I := Index;
  inherited SetIndex(Value);
  S := GetOwnerStrings;
  if (S <> nil) and (I >= 0) and (Value >= 0) and (I <> Value) then
  begin
    while I >= S.Count do
      S.Add('');
    S.Move(I, Value);
  end;
end;