Displaying 'x' icon in TBalloonHint - delphi

Question

How to display 'x' (close) icon in TBalloonHint?
I want to programmatically display near a control on form a balloon hint that looks like notifications in system tray. If this is not what TBalloonHint can do, what should I use?

Answer 1

First you need a procedure to show your hint :
uses
CommCtrl;
// hWnd - control window handle to attach the baloon to.
// Icon - icon index; 0 = none, 1 = info, 2 = warning, 3 = error.
// BackCL - background color or clDefault to use system setting.
// TextCL - text and border colors or clDefault to use system setting.
// Title - tooltip title (bold first line).
// Text - tooltip text.
procedure ShowBalloonTip(hWnd: THandle; Icon: integer; BackCL, TextCL: TColor; Title: pchar; Text: PWideChar);
const
TOOLTIPS_CLASS = 'tooltips_class32';
TTS_ALWAYSTIP = $01;
TTS_NOPREFIX = $02;
TTS_BALLOON = $40;
TTF_SUBCLASS = $0010;
TTF_TRANSPARENT = $0100;
TTF_CENTERTIP = $0002;
TTM_ADDTOOL = $0400 + 50;
TTM_SETTITLE = (WM_USER + 32);
ICC_WIN95_CLASSES = $000000FF;
type
TOOLINFO = packed record
cbSize: integer;
uFlags: integer;
hWnd: THandle;
uId: integer;
rect: TRect;
hinst: THandle;
lpszText: PWideChar;
lParam: integer;
end;
var
hWndTip: THandle;
ti: TOOLINFO;
begin
hWndTip := CreateWindow(TOOLTIPS_CLASS, nil, WS_POPUP or TTS_CLOSE or TTS_NOPREFIX or TTS_BALLOON or TTS_ALWAYSTIP, 0, 0, 0, 0, hWnd, 0, HInstance, nil);
if hWndTip <> 0 then
begin
SetWindowPos(hWndTip, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOSIZE);
ti.cbSize := SizeOf(ti);
ti.uFlags := TTF_CENTERTIP or TTF_TRANSPARENT or TTF_SUBCLASS;
ti.hWnd := hWnd;
ti.lpszText := Text;
Windows.GetClientRect(hWnd, ti.rect);
if BackCL <> clDefault then
SendMessage(hWndTip, TTM_SETTIPBKCOLOR, BackCL, 0);
if TextCL <> clDefault then
SendMessage(hWndTip, TTM_SETTIPTEXTCOLOR, TextCL, 0);
SendMessage(hWndTip, TTM_ADDTOOL, 1, integer(#ti));
SendMessage(hWndTip, TTM_SETTITLE, Icon mod 4, integer(Title));
//TTM_TRACKACTIVATE => Makes sure you have to close the hint you self
SendMessage(hWndTip, TTM_TRACKACTIVATE, integer(true), integer(#ti));
end;
end;
Then call it :
ShowBalloonTip(Button1.Handle, 4, clDefault, clRed, 'Baloon Title', 'Baloon text');
Hint: if you don’t have hWnd (e.g. Speed Buttons or other graphic component) or want to show the baloon elsewhere send TTM_TRACKPOSITION message after TTM_SETTITLE.
***** EDIT *****
This could also be done via a class helper
First create a unit with a Class helper
unit ComponentBaloonHintU;
interface
uses
Controls, CommCtrl, Graphics;
{$SCOPEDENUMS ON}
type
TIconKind = (None = TTI_NONE, Info = TTI_INFO, Warning = TTI_WARNING, Error = TTI_ERROR, Info_Large = TTI_INFO_LARGE, Warning_Large = TTI_WARNING_LARGE, Eror_Large = TTI_ERROR_LARGE);
TComponentBaloonhint = class helper for TWinControl
public
procedure ShowBalloonTip(Icon: TIconKind; const Title, Text: string);
end;
implementation
uses
Windows;
{ TComponentBaloonhint }
procedure TComponentBaloonhint.ShowBalloonTip(Icon: TIconKind; const Title, Text: string);
var
hWndTip: THandle;
ToolInfo: TToolInfo;
BodyText: pWideChar;
begin
hWndTip := CreateWindow(TOOLTIPS_CLASS, nil, WS_POPUP or TTS_CLOSE or TTS_NOPREFIX or TTS_BALLOON or TTS_ALWAYSTIP, 0, 0, 0, 0, Handle, 0, HInstance, nil);
if hWndTip = 0 then
exit;
GetMem(BodyText, 2 * 256);
try
ToolInfo.cbSize := SizeOf(TToolInfo);
ToolInfo.uFlags := TTF_CENTERTIP or TTF_TRANSPARENT or TTF_SUBCLASS;
ToolInfo.hWnd := Handle;
ToolInfo.lpszText := StringToWideChar(Text, BodyText, 2 * 356);
SetWindowPos(hWndTip, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE or SWP_NOMOVE or SWP_NOSIZE);
ToolInfo.Rect := GetClientRect;
SendMessage(hWndTip, TTM_ADDTOOL, 1, integer(#ToolInfo));
SendMessage(hWndTip, TTM_SETTITLE, integer(Icon), integer(PChar(Title)));
SendMessage(hWndTip, TTM_TRACKACTIVATE, integer(true), integer(#ToolInfo));
finally
FreeMem(BodyText);
end;
end;
end.
Then call it:
uses
ComponentBaloonHintU;
procedure TForm1.Button1Click(Sender: TObject);
begin
Button1.ShowBalloonTip(TIconKind.Eror_Large, 'Baloon Title', 'Baloon text');
end;