private void ShowZoomWindow(int x, int y)
{
if (_zoomWindow == null)
{
_zoomWindow = new ZoomWindow();
_zoomWindow.Content = _zoomViewModel;
_zoomWindow.Loaded += ZoomWindow_Loaded;
_zoomWindow.IsVisibleChanged += ZoomWindow_IsVisibleChanged;
}
// we just started zooming, remember where we opened zoom window
if (_currentZoomLevel == 1 && _previousZoomLevel == 0)
{
var dpi = MonitorResolutionHelper.GetCurrentMonitorDpi();
_previousScaledX = x / dpi.DpiScaleX;
_previousScaledY = y / dpi.DpiScaleY;
}
_lastLeft = Math.Floor(_previousScaledX - (BaseZoomImageSize * Math.Pow(ZoomFactor, _currentZoomLevel - 1) / 2));
_lastTop = Math.Floor(_previousScaledY - (BaseZoomImageSize * Math.Pow(ZoomFactor, _currentZoomLevel - 1) / 2));
var justShown = false;
if (!_zoomWindow.IsVisible)
{
_zoomWindow.Left = _lastLeft;
_zoomWindow.Top = _lastTop;
_zoomViewModel.Height = BaseZoomImageSize;
_zoomViewModel.Width = BaseZoomImageSize;
_zoomWindow.Show();
justShown = true;
// make sure color picker window is on top of just opened zoom window
AppStateHandler.SetTopMost();
}
// dirty hack - sometimes when we just show a window on a second monitor with different DPI,
// window position is not set correctly on a first time, we need to "ping" it again to make it appear on the proper location
if (justShown)
{
_zoomWindow.Left = _lastLeft + 1;
_zoomWindow.Top = _lastTop + 1;
SessionEventHelper.Event.ZoomUsed = true;
}
_throttledActionInvoker.ScheduleAction(
() =>
{
_zoomWindow.DesiredLeft = _lastLeft;
_zoomWindow.DesiredTop = _lastTop;
_zoomViewModel.DesiredHeight = BaseZoomImageSize * _zoomViewModel.ZoomFactor;
_zoomViewModel.DesiredWidth = BaseZoomImageSize * _zoomViewModel.ZoomFactor;
},
ZoomWindowChangeDelayInMS);
}
private void ShowZoomWindow(System.Windows.Point point)
{
_zoomWindow ??= new ZoomWindow
{
Content = _zoomViewModel,
Opacity = 0,
};
if (!_zoomWindow.IsVisible)
{
_zoomWindow.Show();
}
if (_zoomWindow.Opacity < 0.5)
{
var halfWidth = _zoomWindow.Width / 2;
var halfHeight = _zoomWindow.Height / 2;
// usually takes 1-3 iterations to converge
// 5 is just an arbitrary limit to prevent infinite loops
for (var i = 0; i < 5; i++)
{
// mouse position relative to top left of _zoomWindow
var scaledPoint = _zoomWindow.PointFromScreen(point);
var diffX = scaledPoint.X - halfWidth;
var diffY = scaledPoint.Y - halfHeight;
// minimum difference that is considered important
const double minDiff = 0.05;
if (Math.Abs(diffX) < minDiff && Math.Abs(diffY) < minDiff)
{
break;
}
_zoomWindow.Left += diffX;
_zoomWindow.Top += diffY;
}
// make sure color picker window is on top of just opened zoom window
AppStateHandler.SetTopMost();
_zoomWindow.Opacity = 1;
}
_zoomViewModel.DesiredHeight = BaseZoomImageSize * _zoomViewModel.ZoomFactor;
_zoomViewModel.DesiredWidth = BaseZoomImageSize * _zoomViewModel.ZoomFactor;
}
