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{
fpGUI - Free Pascal GUI Library
Progress Bar class declarations
Copyright (C) 2000 - 2006 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.
}
{%mainunit fpgui.pas}
{
Progress Bar implementation
}
{$IFDEF read_interface}
{ TCustomProgressBar }
TFCustomProgressBar = class(TFCustomPanel)
private
FFillColor: TColor;
FMax: integer;
FMin: integer;
FPosition: integer;
FShowPercentage: Boolean;
procedure SetFillColor(const AValue: TColor);
procedure SetMax(const AValue: integer);
procedure SetMin(const AValue: integer);
procedure SetPosition(const AValue: integer);
procedure SetShowPercentage(const AValue: Boolean);
protected
procedure Paint(Canvas: TFCanvas); override;
property FillColor: TColor read FFillColor write SetFillColor default clRed;
property Position: integer read FPosition write SetPosition;
property Min: integer read FMin write SetMin default 0;
property Max: integer read FMax write SetMax default 100;
property ShowPercentage: Boolean read FShowPercentage write SetShowPercentage default True;
public
constructor Create(const pText: string; pOwner: TComponent); overload;
end;
TFProgressBar = class(TFCustomProgressBar)
published
property CanExpandWidth;
property CanExpandHeight;
property Enabled;
// property Text;
property FillColor;
property Position;
property Min;
property Max;
property ShowPercentage;
end;
{$ENDIF read_interface}
{$IFDEF read_implementation}
procedure TFCustomProgressBar.SetFillColor(const AValue: TColor);
begin
if FFillColor = AValue then exit;
FFillColor := AValue;
Redraw;
end;
procedure TFCustomProgressBar.SetMax(const AValue: integer);
begin
if FMax = AValue then exit;
FMax := AValue;
if FPosition > FMax then
FPosition := FMax;
Redraw;
end;
procedure TFCustomProgressBar.SetMin(const AValue: integer);
begin
if FMin = AValue then exit;
FMin := AValue;
if FPosition < FMin then
FPosition := FMin;
Redraw;
end;
procedure TFCustomProgressBar.SetPosition(const AValue: integer);
begin
if FPosition = AValue then
exit; //==>
if (AValue >= Min) and (AValue <= Max) then
begin
FPosition := AValue;
Redraw;
end;
end;
procedure TFCustomProgressBar.SetShowPercentage(const AValue: Boolean);
begin
if FShowPercentage = AValue then
Exit; //==>
FShowPercentage := AValue;
Redraw;
end;
procedure TFCustomProgressBar.Paint(Canvas: TFCanvas);
var
Pt: TPoint;
r: TRect;
p: integer;
percent: integer;
t: string;
begin
FText := '';
inherited Paint(Canvas);
Canvas.SetColor(Style.GetUIColor(FFillColor));
percent := (100 div (Max - Min)) * FPosition;
p := (percent * (Width - 3)) div 100;
r := Rect(
ClientRect.Left + 3,
ClientRect.Top + 3,
p,
ClientRect.Bottom - 3);
Canvas.FillRect(r);
if FShowPercentage then
begin
t := IntToStr(percent) + '%';
Pt.x := (Width - Canvas.TextWidth(t)) div 2;
Pt.y := (Height - Canvas.FontCellHeight) div 2;
Canvas.SetColor(Style.GetUIColor(clBtnText));
Style.DrawText(Canvas, Pt, t, WidgetState);
end;
end;
constructor TFCustomProgressBar.Create(const pText: string; pOwner: TComponent);
begin
inherited Create(pText, pOwner);
FCanExpandHeight := False;
FBevelStyle := bsLowered;
FFillColor := clRed;
FMin := 0;
FMax := 100;
FShowPercentage := True;
end;
{$ENDIF read_implementation}
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