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{
A very quick and basic style implementation. It took all of 10 minutes.
To apply this style, follow these instructions:
1) (optional) Check if a style was specified via a command line parameter
2) If (1) was false, set the new default which will instantiate the new
style class and automatically free the old one.
3) Assign our new style instance to the fpgStyle variable
Example:
procedure MainProc;
var
frm: TMainForm;
begin
fpgApplication.Initialize;
{ Set our new style as the default (before we create any forms), unless
a the end-user specified a different style via the command line. }
if not gCommandLineParams.IsParam('style') then
if fpgStyleManager.SetStyle('Demo Style') then
fpgStyle := fpgStyleManager.Style;
frm := TMainForm.Create(nil);
try
frm.Show;
fpgApplication.Run;
finally
frm.Free;
end;
end;
}
unit mystyle;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, fpg_main, fpg_base;
type
TMyStyle = class(TfpgStyle)
public
constructor Create; override;
{ General }
procedure DrawControlFrame(ACanvas: TfpgCanvas; x, y, w, h: TfpgCoord); override;
{ Buttons }
procedure DrawButtonFace(ACanvas: TfpgCanvas; x, y, w, h: TfpgCoord; AFlags: TfpgButtonFlags); override;
{ Menus }
procedure DrawMenuRow(ACanvas: TfpgCanvas; r: TfpgRect; AFlags: TfpgMenuItemFlags); override;
procedure DrawMenuBar(ACanvas: TfpgCanvas; r: TfpgRect; ABackgroundColor: TfpgColor); override;
end;
implementation
uses
fpg_stylemanager
;
{ TMyStyle }
constructor TMyStyle.Create;
begin
inherited Create;
fpgSetNamedColor(clWindowBackground, TfpgColor($eeeeec));
end;
procedure TMyStyle.DrawControlFrame(ACanvas: TfpgCanvas; x, y, w, h: TfpgCoord);
var
r: TfpgRect;
begin
r.SetRect(x, y, w, h);
ACanvas.SetColor(clShadow1);
ACanvas.Clear(clYellow);
ACanvas.DrawRectangle(r);
end;
procedure TMyStyle.DrawButtonFace(ACanvas: TfpgCanvas; x, y, w, h: TfpgCoord; AFlags: TfpgButtonFlags);
var
r: TfpgRect;
begin
r.SetRect(x, y, w, h);
if btfIsDefault in AFlags then
begin
ACanvas.SetColor(TfpgColor($7b7b7b));
ACanvas.SetLineStyle(1, lsSolid);
ACanvas.DrawRectangle(r);
InflateRect(r, -1, -1);
Exclude(AFlags, btfIsDefault);
fpgStyle.DrawButtonFace(ACanvas, r.Left, r.Top, r.Width, r.Height, AFlags);
Exit; //==>
end;
// Clear the canvas
ACanvas.SetColor(clWindowBackground);
ACanvas.FillRectangle(r);
if (btfFlat in AFlags) and not (btfIsPressed in AFlags) then
Exit; // no need to go further
// outer rectangle
ACanvas.SetLineStyle(1, lsSolid);
ACanvas.SetColor(TfpgColor($a6a6a6));
ACanvas.DrawRectangle(r);
// so we don't paint over the border
InflateRect(r, -1, -1);
// now paint the face of the button
if (btfIsPressed in AFlags) then
begin
ACanvas.GradientFill(r, TfpgColor($cccccc), TfpgColor($e4e4e4), gdVertical);
end
else
begin
ACanvas.GradientFill(r, TfpgColor($fafafa), TfpgColor($e2e2e2), gdVertical);
ACanvas.SetColor(TfpgColor($cccccc));
ACanvas.DrawLine(r.Right, r.Top, r.Right, r.Bottom); // right
ACanvas.DrawLine(r.Right, r.Bottom, r.Left, r.Bottom); // bottom
end;
end;
procedure TMyStyle.DrawMenuRow(ACanvas: TfpgCanvas; r: TfpgRect; AFlags: TfpgMenuItemFlags);
begin
inherited DrawMenuRow(ACanvas, r, AFlags);
if (mifSelected in AFlags) and not (mifSeparator in AFlags) then
ACanvas.GradientFill(r, TfpgColor($fec475), TfpgColor($fb9d24), gdVertical);
end;
procedure TMyStyle.DrawMenuBar(ACanvas: TfpgCanvas; r: TfpgRect; ABackgroundColor: TfpgColor);
var
FLightColor: TfpgColor;
FDarkColor: TfpgColor;
begin
// a possible future theme option
FLightColor := TfpgColor($f0ece3); // color at top of menu bar
FDarkColor := TfpgColor($beb8a4); // color at bottom of menu bar
ACanvas.GradientFill(r, FLightColor, FDarkColor, gdVertical);
// inner bottom line
ACanvas.SetColor(clShadow1);
ACanvas.DrawLine(r.Left, r.Bottom-1, r.Right+1, r.Bottom-1); // bottom
// outer bottom line
ACanvas.SetColor(clWhite);
ACanvas.DrawLine(r.Left, r.Bottom, r.Right+1, r.Bottom); // bottom
end;
initialization
fpgStyleManager.RegisterClass('Demo Style', TMyStyle);
end.
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