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Commitf566547

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feat: calculate taskbar position and display on top of it (#125)
Closes:#119
1 parentcf25db5 commitf566547

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1 file changed

+105
-50
lines changed

1 file changed

+105
-50
lines changed

‎App/Views/TrayWindow.xaml.cs

Lines changed: 105 additions & 50 deletions
Original file line numberDiff line numberDiff line change
@@ -33,8 +33,6 @@ public sealed partial class TrayWindow : Window
3333
privateint_lastWindowHeight;
3434
privateStoryboard?_currentSb;
3535

36-
privateNativeApi.POINT?_lastActivatePosition;
37-
3836
privatereadonlyIRpcController_rpcController;
3937
privatereadonlyICredentialManager_credentialManager;
4038
privatereadonlyISyncSessionController_syncSessionController;
@@ -98,18 +96,18 @@ public TrayWindow(IRpcController rpcController, ICredentialManager credentialMan
9896
WindowNative.GetWindowHandle(this)));
9997
SizeProxy.SizeChanged+=(_,e)=>
10098
{
101-
if(_currentSbisnull)return;// nothing running
99+
if(_currentSbisnull)return;// nothing running
102100

103-
intnewHeight=(int)Math.Round(
101+
varnewHeight=(int)Math.Round(
104102
e.NewSize.Height*DisplayScale.WindowScale(this));
105103

106-
intdelta=newHeight-_lastWindowHeight;
104+
vardelta=newHeight-_lastWindowHeight;
107105
if(delta==0)return;
108106

109107
varpos=_aw.Position;
110108
varsize=_aw.Size;
111109

112-
pos.Y-=delta;// grow upward
110+
pos.Y-=delta;// grow upward
113111
size.Height=newHeight;
114112

115113
_aw.MoveAndResize(
@@ -225,7 +223,6 @@ private void OnStoryboardCompleted(object? sender, object e)
225223

226224
privatevoidMoveResizeAndActivate()
227225
{
228-
SaveCursorPos();
229226
varsize=CalculateWindowSize(RootFrame.GetContentSize().Height);
230227
varpos=CalculateWindowPosition(size);
231228
varrect=newRectInt32(pos.X,pos.Y,size.Width,size.Height);
@@ -234,18 +231,6 @@ private void MoveResizeAndActivate()
234231
ForegroundWindow.MakeForeground(this);
235232
}
236233

237-
privatevoidSaveCursorPos()
238-
{
239-
varres=NativeApi.GetCursorPos(outvarcursorPosition);
240-
if(res)
241-
_lastActivatePosition=cursorPosition;
242-
else
243-
// When the cursor position is null, we will spawn the window in
244-
// the bottom right corner of the primary display.
245-
// TODO: log(?) an error when this happens
246-
_lastActivatePosition=null;
247-
}
248-
249234
privateSizeInt32CalculateWindowSize(doubleheight)
250235
{
251236
if(height<=0)height=100;// will be resolved next frame typically
@@ -257,41 +242,44 @@ private SizeInt32 CalculateWindowSize(double height)
257242
returnnewSizeInt32(newWidth,newHeight);
258243
}
259244

260-
privatePointInt32CalculateWindowPosition(SizeInt32size)
245+
privatePointInt32CalculateWindowPosition(SizeInt32panelSize)
261246
{
262-
varwidth=size.Width;
263-
varheight=size.Height;
264-
265-
varcursorPosition=_lastActivatePosition;
266-
if(cursorPositionisnull)
247+
vararea=DisplayArea.GetFromWindowId(AppWindow.Id,DisplayAreaFallback.Primary);
248+
// whole monitor
249+
varbounds=area.OuterBounds;
250+
// monitor minus taskbar
251+
varworkArea=area.WorkArea;
252+
253+
// get taskbar details - position, gap (size), auto-hide
254+
vartb=GetTaskbarInfo(area);
255+
256+
// safe edges where tray window can touch the screen
257+
varsafeRight=workArea.X+workArea.Width;
258+
varsafeBottom=workArea.Y+workArea.Height;
259+
260+
// if the taskbar is auto-hidden at the bottom, stay clear of its reveal band
261+
if(tb.Position==TaskbarPosition.Bottom&&tb.AutoHide)
262+
safeBottom-=tb.Gap;// shift everything up by its thickness
263+
264+
// pick corner & position the panel
265+
intx,y;
266+
switch(tb.Position)
267267
{
268-
varprimaryWorkArea=DisplayArea.Primary.WorkArea;
269-
returnnewPointInt32(
270-
primaryWorkArea.Width-width,
271-
primaryWorkArea.Height-height
272-
);
273-
}
274-
275-
// Spawn the window to the top right of the cursor.
276-
varx=cursorPosition.Value.X+10;
277-
vary=cursorPosition.Value.Y-10-height;
278-
279-
varworkArea=DisplayArea.GetFromPoint(
280-
newPointInt32(cursorPosition.Value.X,cursorPosition.Value.Y),
281-
DisplayAreaFallback.Primary
282-
).WorkArea;
283-
284-
// Adjust if the window goes off the right edge of the display.
285-
if(x+width>workArea.X+workArea.Width)x=workArea.X+workArea.Width-width;
286-
287-
// Adjust if the window goes off the bottom edge of the display.
288-
if(y+height>workArea.Y+workArea.Height)y=workArea.Y+workArea.Height-height;
268+
caseTaskbarPosition.Left:// for Left we will stick to the left-bottom corner
269+
x=bounds.X+tb.Gap;// just right of the bar
270+
y=safeBottom-panelSize.Height;
271+
break;
289272

290-
// Adjust if the window goes off the left edge of the display (somehow).
291-
if(x<workArea.X)x=workArea.X;
273+
caseTaskbarPosition.Top:// for Top we will stick to the top-right corner
274+
x=safeRight-panelSize.Width;
275+
y=bounds.Y+tb.Gap;// just below the bar
276+
break;
292277

293-
// Adjust if the window goes off the top edge of the display (somehow).
294-
if(y<workArea.Y)y=workArea.Y;
278+
default:// Bottom or Right bar we will stick to the bottom-right corner
279+
x=safeRight-panelSize.Width;
280+
y=safeBottom-panelSize.Height;
281+
break;
282+
}
295283

296284
returnnewPointInt32(x,y);
297285
}
@@ -342,4 +330,71 @@ public struct POINT
342330
publicintY;
343331
}
344332
}
333+
334+
internalenumTaskbarPosition{Left,Top,Right,Bottom}
335+
336+
internalreadonlyrecordstructTaskbarInfo(TaskbarPositionPosition,intGap,boolAutoHide);
337+
338+
// -----------------------------------------------------------------------------
339+
// Taskbar helpers – ABM_GETTASKBARPOS / ABM_GETSTATE via SHAppBarMessage
340+
// -----------------------------------------------------------------------------
341+
privatestaticTaskbarInfoGetTaskbarInfo(DisplayAreaarea)
342+
{
343+
vardata=newAPPBARDATA
344+
{
345+
cbSize=(uint)Marshal.SizeOf<APPBARDATA>()
346+
};
347+
348+
// Locate the taskbar.
349+
if(SHAppBarMessage(ABM_GETTASKBARPOS,refdata)==0)
350+
returnnewTaskbarInfo(TaskbarPosition.Bottom,0,false);// failsafe
351+
352+
varautoHide=(SHAppBarMessage(ABM_GETSTATE,refdata)&ABS_AUTOHIDE)!=0;
353+
354+
// Use uEdge instead of guessing from the RECT.
355+
varpos=data.uEdgeswitch
356+
{
357+
ABE_LEFT=>TaskbarPosition.Left,
358+
ABE_TOP=>TaskbarPosition.Top,
359+
ABE_RIGHT=>TaskbarPosition.Right,
360+
_=>TaskbarPosition.Bottom,// ABE_BOTTOM or anything unexpected
361+
};
362+
363+
// Thickness (gap) = shorter side of the rect.
364+
vargap=(pos==TaskbarPosition.Left||pos==TaskbarPosition.Right)
365+
?data.rc.right-data.rc.left// width
366+
:data.rc.bottom-data.rc.top;// height
367+
368+
returnnewTaskbarInfo(pos,gap,autoHide);
369+
}
370+
371+
// ------------- P/Invoke plumbing -------------
372+
privateconstuintABM_GETTASKBARPOS=0x0005;
373+
privateconstuintABM_GETSTATE=0x0004;
374+
privateconstintABS_AUTOHIDE=0x0001;
375+
376+
privateconstintABE_LEFT=0;// values returned in APPBARDATA.uEdge
377+
privateconstintABE_TOP=1;
378+
privateconstintABE_RIGHT=2;
379+
privateconstintABE_BOTTOM=3;
380+
381+
[StructLayout(LayoutKind.Sequential)]
382+
privatestructAPPBARDATA
383+
{
384+
publicuintcbSize;
385+
publicIntPtrhWnd;
386+
publicuintuCallbackMessage;
387+
publicuintuEdge;// contains ABE_* value
388+
publicRECTrc;
389+
publicintlParam;
390+
}
391+
392+
[StructLayout(LayoutKind.Sequential)]
393+
privatestructRECT
394+
{
395+
publicintleft,top,right,bottom;
396+
}
397+
398+
[DllImport("shell32.dll",CharSet=CharSet.Auto)]
399+
privatestaticexternuintSHAppBarMessage(uintdwMessage,refAPPBARDATApData);
345400
}

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