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unit CocoaStatusBar;
{$mode objfpc}{$H+}
{$modeswitch objectivec2}
{$interfaces corba}
interface
uses
Classes, SysUtils,
LCLType, LMessages, LCLMessageGlue, ComCtrls,
CocoaAll, CocoaPrivate, CocoaCallback, CocoaGDIObjects ,CocoaWSCommon, CocoaUtils,
CocoaCustomControl;
type
{ IStatusBarCallback }
IStatusBarCallback = interface {(ICommonCallback) // not needed to inherit from ICommonCallback}
function GetBarsCount: Integer;
//todo: consider the use Cocoa native types, instead of FPC TAlignment
function GetBarItem(idx: Integer; var txt: String;
var width: Integer; var align: TAlignment): Boolean;
procedure DrawPanel(idx: Integer; const r: TRect);
end;
TStatusItemData = record
Text : NSString;
Width : Integer;
Align : TAlignment;
end;
TStatusItemDataArray = array of TStatusItemData;
TCocoaStatusBar = objcclass(TCocoaCustomControl)
public
//StatusBar : TStatusBar;
barcallback : IStatusBarCallback;
panelCell : NSCell;
procedure drawRect(dirtyRect: NSRect); override;
procedure dealloc; override;
end;
{ TStatusBarCallback }
TStatusBarCallback = class(TLCLCommonCallback, IStatusBarCallback, ICommonCallback)
function GetBarsCount: Integer;
function GetBarItem(idx: Integer; var txt: String; var width: Integer; var align: TAlignment): Boolean;
procedure DrawPanel(idx: Integer; const r: TRect);
end;
implementation
{ TCocoaStatusBar }
procedure TCocoaStatusBar.drawRect(dirtyRect: NSRect);
var
R : TRect;
i : Integer;
cs : NSString;
nr : NSRect;
dr : NSRect;
al : TAlignment;
x : Integer;
txt : string;
cnt : Integer;
w : Integer;
const
CocoaAlign: array [TAlignment] of Integer = (NSNaturalTextAlignment, NSRightTextAlignment, NSCenterTextAlignment);
begin
if not Assigned(barcallback) then Exit;
if not Assigned(panelCell) then Exit;
panelCell.setControlView(Self);
r := lclClientFrame();
nr.origin.y := 0;
nr.size.height := self.lclFrame.Height;
x:=0;
cnt := barcallback.GetBarsCount;
for i:=0 to cnt - 1 do begin
txt := '';
w := 0;
al := taLeftJustify;
if not barcallback.GetBarItem(i, txt, w, al) then Continue;
if i = cnt - 1 then w := r.Right - x;
nr.size.width := w;
nr.origin.x := x;
// dr - draw rect. should be 1 pixel wider
// and 1 pixel taller, than the actual rect.
// to produce a better visual effect
dr := nr;
dr.size.width := dr.size.width + 1;
dr.size.height := dr.size.height + 1;
dr.origin.y := dr.origin.y-1;
cs := NSStringUtf8(txt);
panelCell.setTitle(cs);
panelCell.setAlignment(CocoaAlign[al]);
panelCell.drawWithFrame_inView(dr, Self);
cs.release;
barcallback.DrawPanel(i, NSRectToRect(nr));
inc(x, w);
if x > r.Right then break; // no place left
end;
end;
procedure TCocoaStatusBar.dealloc;
begin
if Assigned(panelCell) then panelCell.release;
inherited;
end;
{ TStatusBarCallback }
function TStatusBarCallback.GetBarsCount: Integer;
begin
if TStatusBar(Target).SimplePanel
then Result := 1
else Result := TStatusBar(Target).Panels.Count;
end;
function TStatusBarCallback.GetBarItem(idx: Integer; var txt: String;
var width: Integer; var align: TAlignment): Boolean;
var
sb : TStatusBar;
begin
sb := TStatusBar(Target);
if sb.SimplePanel then begin
Result := idx = 0;
if not Result then Exit;
txt := sb.SimpleText;
width := sb.Width;
align := taLeftJustify; // todo: RTL?
end else begin
Result := (idx >= 0) and (idx < sb.Panels.Count);
if not Result then Exit;
if sb.Panels[idx].Style = psOwnerDraw
then txt := ''
else txt := sb.Panels[idx].Text;
width := sb.Panels[idx].Width;
align := sb.Panels[idx].Alignment;
end;
end;
procedure TStatusBarCallback.DrawPanel(idx: Integer; const r: TRect);
var
sb : TStatusBar;
msg : TLMDrawItems;
ctx : TCocoaContext;
dr : TDrawItemStruct;
fr : TRect;
sv : Integer;
begin
sb := TStatusBar(Target);
if sb.SimplePanel then Exit;
if (idx<0) or (idx >= sb.Panels.Count) then Exit;
if sb.Panels[idx].Style <> psOwnerDraw then Exit;
ctx := TCocoaContext.Create(NSGraphicsContext.currentContext);
sv := ctx.SaveDC;
try
FillChar(msg, sizeof(msg), 0);
FillChar(dr, sizeof(dr), 0);
msg.Ctl := Target.Handle;
msg.Msg := LM_DRAWITEM;
msg.DrawItemStruct := @dr;
dr.itemID := idx;
dr._hDC := HDC(ctx);
dr.rcItem := r;
fr := NSView(Owner).lclFrame;
ctx.InitDraw(fr.Right-fr.Left, fr.Bottom-fr.Top);
LCLMessageGlue.DeliverMessage(Target, msg);
finally
ctx.RestoreDC(sv);
ctx.Free;
end;
end;
end.
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