ATListbox
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About
ATListbox is OS-independant listbox control. It's made for dialog like Sublime Text's command list. If OnDrawItem is set, listbox is fully owner-drawn: you must not set items, just set ItemCount, ItemIndex.
Listbox doesn't get focus by click; to get focus on click set CanGetFocus=true (if focused, it handles keys Up/Down/PgUp/PgDn/Home/End, else you need to handle OnKeyDown in form and set listbox's ItemIndex by hand, which is boring).
Author: Alexey Torgashin
Screenshot:
Download
Homepage at github: https://github.com/Alexey-T/ATFlatControls
License
MPL 2.0 or LGPL.
Properties
- Items: StringList to store items, or you can ignore it if you use OnDrawItem event (listbox will be fully virtual)
- ItemCount: count of items
- ItemIndex: index of active item
- ItemTop: index of item visible at the top
- ItemHeight: height (in pixels) of each item
- VisibleItems: count of items fully visible inside control
- CanGetFocus: allow control to be focused on click
- ThemedScrollbar: allows control to use ATScrollBar instead of default OS scrollbar
- ThemedColors: not used (made to use in CudaText app)
Events
- OnClick
- OnDblClick
- OnDrawItem: allows to owner-draw all items
- OnChangedSel: fired on changed ItemIndex
Example
Let's create list:
uses Math, ATListbox; //package atflatcontrols_package.lpk
var
b: TATListbox;
procedure TfmMain.FormCreate(Sender: TObject);
begin
b:= TATListbox.Create(Self);
b.Parent:= Self;
b.Align:= alClient;
b.OnDrawItem:= @ListDraw;
b.OnClick:= @ListClick; //see example in github https://github.com/Alexey-T/ATFlatControls/blob/master/app/demo_listbox/unit1.pas
b.Color:= $e0e0e0;
b.ItemCount:= 21;
end;
Let's set OnDrawItem to this (simply paint "itemNN"):
procedure TfmMain.ListDraw(Sender: TObject; C: TCanvas; AIndex: integer;
const ARect: TRect);
begin
C.Brush.Color:= IfThen(AIndex=b.ItemIndex, clMedGray, b.Color);
C.FillRect(ARect);
C.Pen.Color:= clMedGray;
C.Line(ARect.Left+2, ARect.Bottom-1, ARect.Right-2, ARect.Bottom-1);
C.TextOut(ARect.Left+6, ARect.Top+2, 'item '+inttostr(AIndex));
end;