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lazarus-tutorials/compbrowser/comp_browser_main.pas

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2021-10-12 15:51:51 -04:00
unit comp_browser_main;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Forms, Controls, Graphics, Dialogs, ComCtrls, Menus, Buttons,
StdCtrls, ExtCtrls, ActnList, MaskEdit, grids, CheckLst, PairSplitter, ColorBox,
ValEdit, SynHighlighterPosition, strutils, SynEdit, typinfo;
type
TPalettePage = (ppStandard, ppAdditional, ppOtherPagesNotListedHere);
{ TForm1 }
TForm1 = class(TForm)
seViewer: TSynEdit;
tvComps: TTreeView;
procedure FormCreate(Sender: TObject);
private
compClass: TComponentClass;
procedure LoadTreeView;
function GetComponentClass(aPage: TPalettePage; anIndex: word): TComponentClass;
public
end;
const
MaxComponentsOnAPage = 21; // AdditionalPage
PageNames : array[TPalettePage] of shortstring =
('Standard', 'Additional', 'Other unlisted pages');
var
Form1: TForm1;
implementation
{$R *.lfm}
{ TForm1 }
procedure TForm1.FormCreate(Sender: TObject);
begin
LoadTreeView;
end;
procedure TForm1.LoadTreeView;
var aNode: TTreeNode;
palPage: TPalettePage;
i: integer;
begin
tvComps.BeginUpdate;
for palPage := High(TPalettePage) downto Low(TPalettePage) do
begin
aNode := tvComps.Items.AddFirst(nil, PageNames[palPage]);
for i := 1 to MaxComponentsOnAPage do
begin
compClass := GetComponentClass(palPage, i);
if Assigned(compClass) then
tvComps.Items.AddChildObject(
aNode,
compClass.ClassName,
TObject(compClass)
);
end;
end;
tvComps.EndUpdate;
tvComps.Selected := tvComps.Items[0];
end;
function TForm1.GetComponentClass(
aPage: TPalettePage;
anIndex: word
): TComponentClass;
begin
case aPage of
ppStandard: case anIndex of
1: result := TMainMenu;
2: result := TPopupMenu;
3: result := TButton;
4: result := TLabel;
5: result := TEdit;
6: result := TMemo;
7: result := TToggleBox;
8: result := TCheckBox;
9: result := TRadioButton;
10: result := TListBox;
11: result := TComboBox;
12: result := TScrollBar;
13: result := TGroupBox;
14: result := TRadioGroup;
15: result := TCheckGroup;
16: result := TPanel;
17: result := TFrame;
18: result := TActionList;
else result := nil;
end;
ppAdditional: case anIndex of
1: result := TBitBtn;
2: result := TSpeedbutton;
3: result := TStaticText;
4: result := TImage;
5: result := TShape;
6: result := TBevel;
7: result := TPaintBox;
8: result := TNotebook;
9: result := TlabeledEdit;
10: result := TSplitter;
11: result := TTrayIcon;
12: result := TMaskEdit;
13: result := TCheckListBox;
14: result := TScrollBox;
15: result := TApplicationProperties;
16: result := TStringGrid;
17: result := TDrawGrid;
18: result := TPairSplitter;
19: result := TColorBox;
20: result := TColorListBox;
21: result := TValueListEditor;
else result := nil;
end;
else result := nil;
end;
end;
end.