Title: How to create an application hint like "WinZip"
Question: When you points over an zip file with WinZip installed, Windows Explorer shows and window hint with Zip's information. Create an window hint like WinZip with this unit. Simple add this in your project manager and your application will be ready to show hints like WinZip.
Answer:
unit untHint;
interface
uses
Windows, Controls, Forms, Graphics;
type
TAppHintWindow = class ( THintWindow )
protected
procedure Paint; override;
function CalcHintRect ( MaxWidth: Integer; const AHint: string; AData: Pointer ): TRect; override;
end;
implementation
function TAppHintWindow.CalcHintRect;
var
r: TRect;
begin
r := inherited CalcHintRect ( MaxWidth, AHint, AData );
inflateRect ( r, 6, 3 );
result := r;
end;
procedure TAppHintWindow.Paint;
var
R: TRect;
begin
with Canvas do begin
R := ClientRect;
Brush.Color := $00EAFFFF;
FillRect ( r );
Font.Name := 'Tahoma';
Inc ( R.Left, 7 );
Inc ( R.Top, 5 );
DrawText ( canvas.Handle, PChar ( Caption ), -1, R, DT_LEFT or DT_NOPREFIX or DT_WORDBREAK );
end;
end;
initialization
HintWindowClass := TAppHintWindow;
end.