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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2008 See the file AUTHORS.txt, included in this
distribution, for details of the copyright.
See the file COPYING.modifiedLGPL, included in this distribution,
for details about redistributing fpGUI.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Description:
Defines a window that gets used to display help hints (aka a HintWindow)
}
unit fpg_hint;
{$mode objfpc}{$H+}
{.$Define Debug}
interface
uses
Classes,
SysUtils,
fpg_base,
fpg_main,
fpg_form,
fpg_label;
type
TfpgHintWindow = class(TfpgForm)
private
FFont: TfpgFont;
FTime: Integer;
FShadow: Integer;
FBorder: Integer;
FMargin: Integer;
L_Hint: TfpgLabel;
T_Chrono: TfpgTimer;
procedure FormShow(Sender: TObject);
procedure FormHide(Sender: TObject);
function GetText: TfpgString;
procedure SetText(const AValue: TfpgString);
procedure T_ChronoFini(Sender: TObject);
procedure SetShadow(AValue: Integer);
procedure SetBorder(AValue: Integer);
procedure SetTime(AValue: Integer);
procedure SetLTextColor(AValue: Tfpgcolor);
procedure SetLBackgroundColor(AValue: Tfpgcolor);
procedure SetShadowColor(AValue: TfpgColor);
protected
procedure HandleShow; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure SetPosition(aleft, atop, awidth, aheight: TfpgCoord); override;
property Font: TfpgFont read FFont;
property Text: TfpgString read GetText write SetText;
property Shadow: Integer read FShadow write SetShadow default 5;
property Border: Integer read FBorder write SetBorder default 1;
property Margin: Integer read FMargin write FMargin default 3;
property LTextColor: TfpgColor write SetLTextColor default clBlack;
property LBackgroundColor: TfpgColor write SetLBackgroundColor default clHintWindow;
property ShadowColor: TfpgColor write SetShadowColor default clGray;
property Time: Integer write SetTime default 5000;
end;
TfpgHintWindowClass = class of TfpgHintWindow;
var
HintWindowClass: TfpgHintWindowClass = TfpgHintWindow;
implementation
type
TfpgHintShadow = class(TfpgForm)
public
constructor Create(AOwner: TComponent); override;
end;
var
uShadowForm: TfpgHintShadow;
{ TfpgHintWindow }
procedure TfpgHintWindow.FormShow(Sender: TObject);
begin
T_Chrono.Enabled:= True;
end;
procedure TfpgHintWindow.FormHide(Sender: TObject);
begin
T_Chrono.Enabled := False;
if Assigned(uShadowForm) then
uShadowForm.Hide;
end;
function TfpgHintWindow.GetText: TfpgString;
begin
Result := L_Hint.Text;
end;
procedure TfpgHintWindow.SetText(const AValue: TfpgString);
begin
L_Hint.Text := AValue;
end;
procedure TfpgHintWindow.T_ChronoFini(Sender: TObject);
begin
{$IFDEF DEBUG}
writeln('TF_Hint.T_ChronoFini timer fired');
{$ENDIF}
Hide;
end;
procedure TfpgHintWindow.SetShadow(AValue: Integer);
begin
if FShadow <> AValue then
FShadow := AValue;
end;
procedure TfpgHintWindow.SetBorder(AValue: Integer);
begin
if FBorder <> AValue then
FBorder := AValue;
end;
procedure TfpgHintWindow.SetTime(AValue: Integer);
begin
if FTime <> AValue then
begin
FTime := AValue;
T_Chrono.Interval := FTime;
end;
end;
procedure TfpgHintWindow.SetLTextColor(AValue: Tfpgcolor);
begin
if L_Hint.TextColor <> AValue then
L_Hint.TextColor := AValue
end;
procedure TfpgHintWindow.SetLBackgroundColor(AValue: Tfpgcolor);
begin
if L_Hint.BackgroundColor <> AValue then
L_Hint.BackgroundColor := AValue
end;
procedure TfpgHintWindow.SetShadowColor(AValue: Tfpgcolor);
begin
if uShadowForm.BackgroundColor <> AValue then
uShadowForm.BackgroundColor := AValue;
end;
procedure TfpgHintWindow.HandleShow;
begin
// This is so the Shadow Window is below the Hint Window.
if Shadow > 0 then
begin
uShadowForm.SetPosition(Left+Shadow, Top+Shadow, Width, Height);
uShadowForm.Show;
end;
inherited HandleShow;
end;
constructor TfpgHintWindow.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Name := 'F_Hint';
WindowPosition := wpUser;
WindowType := wtPopup;
Sizeable := False;
BackgroundColor:= clBlack;
FFont := fpgGetFont('#Label1');
FMargin := 3;
FBorder := 1;
FShadow := 5;
FTime := 5000;
L_Hint := CreateLabel(Self, FBorder, FBorder, '', Width - FBorder * 2, Height - FBorder * 2, taCenter, tlCenter);
L_Hint.BackgroundColor := clHintWindow;
L_Hint.OnClick := @T_ChronoFini;
T_Chrono := TfpgTimer.Create(FTime);
T_Chrono.OnTimer := @T_ChronoFini;
uShadowForm:= TfpgHintShadow.Create(nil);
OnShow := @FormShow;
OnHide := @FormHide;
end;
destructor TfpgHintWindow.Destroy;
begin
T_Chrono.Free;
FFont.Free;
inherited Destroy;
end;
procedure TfpgHintWindow.SetPosition(aleft, atop, awidth, aheight: TfpgCoord);
begin
inherited SetPosition(aleft, atop, awidth, aheight);
L_Hint.SetPosition(Border, Border, Width - (Border * 2), Height - (Border * 2));
end;
constructor TfpgHintShadow.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
Name := 'F_Shadow';
WindowPosition := wpUser;
WindowType := wtPopup;
Sizeable := False;
BackgroundColor := clGray;
end;
initialization
finalization
FreeAndNil(uShadowForm);
end.
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