private CustomPopupPlacement[] ComboBoxCustomPopupPlacementCallback(Size popupSize, Size targetSize,
Point offset)
{
var locationFromScreen = this.PlacementTarget.PointToScreen(new Point(0, 0));
var mainVisual = PlacementTarget.GetVisualAncestry().OfType <System.Windows.Media.Visual>().LastOrDefault();
if (mainVisual == null)
{
return(new CustomPopupPlacement[0]);
}
var screenWidth = (int)DpiHelper.TransformToDeviceX(mainVisual, SystemParameters.PrimaryScreenWidth);
var screenHeight = (int)DpiHelper.TransformToDeviceY(mainVisual, SystemParameters.PrimaryScreenHeight);
var locationX = (int)locationFromScreen.X % screenWidth;
var locationY = (int)locationFromScreen.Y % screenHeight;
var realOffsetX = (popupSize.Width - targetSize.Width) / 2.0;
var offsetX = DpiHelper.TransformToDeviceX(mainVisual, offset.X);
var defaultVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, DefaultVerticalOffset);
var upVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, UpVerticalOffset);
var downVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, DownVerticalOffset);
if (locationX + popupSize.Width - realOffsetX > screenWidth ||
locationX + realOffsetX < 0)
{
SetChildTemplateIfNeed(DefaultContentTemplate);
var newY = locationY + popupSize.Height > screenHeight
? -(defaultVerticalOffsetIndepent + popupSize.Height)
: defaultVerticalOffsetIndepent + targetSize.Height;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.Horizontal) });
}
if (locationY + popupSize.Height > screenHeight)
{
SetChildTemplateIfNeed(UpContentTemplate);
var newY = upVerticalOffsetIndepent - popupSize.Height + targetSize.Height;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.None) });
}
else
{
SetChildTemplateIfNeed(DownContentTemplate);
var newY = downVerticalOffsetIndepent;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.None) });
}
}
private PositioningData GetPositioningData(IEnumerable <DependencyObject> visualAncestry, Size popupSize, Size targetSize, Point offset)
{
var locationFromScreen = PlacementTarget.PointToScreen(new Point(0, 0));
var mainVisual = visualAncestry.OfType <Visual>().LastOrDefault();
if (mainVisual == null)
{
throw new ArgumentException($"{nameof(visualAncestry)} must contains unless one {nameof(Visual)} control inside.");
}
var screen = Screen.FromPoint(locationFromScreen);
var screenWidth = (int)DpiHelper.TransformToDeviceX(mainVisual, (int)screen.Bounds.Width);
var screenHeight = (int)DpiHelper.TransformToDeviceY(mainVisual, (int)screen.Bounds.Height);
//Adjust the location to be in terms of the current screen
var locationX = (int)(locationFromScreen.X - screen.Bounds.X) % screenWidth;
var locationY = (int)(locationFromScreen.Y - screen.Bounds.Y) % screenHeight;
var upVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, UpVerticalOffset);
var newUpY = upVerticalOffsetIndepent - popupSize.Height + targetSize.Height;
var newDownY = DpiHelper.TransformToDeviceY(mainVisual, DownVerticalOffset);
double offsetX;
const int rtlHorizontalOffset = 20;
if (FlowDirection == FlowDirection.LeftToRight)
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual, offset.X);
}
else
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual,
offset.X - targetSize.Width - rtlHorizontalOffset);
}
return(new PositioningData(
mainVisual, offsetX,
newUpY, newDownY,
popupSize, targetSize,
locationX, locationY,
screenHeight, screenWidth));
}
private PositioningData GetPositioningData(IEnumerable <DependencyObject> visualAncestry, Size popupSize, Size targetSize, Point offset)
{
var locationFromScreen = PlacementTarget.PointToScreen(new Point(0, 0));
var mainVisual = visualAncestry.OfType <Visual>().LastOrDefault();
if (mainVisual == null)
{
throw new ArgumentException($"{nameof(visualAncestry)} must contains unless one {nameof(Visual)} control inside.");
}
var screenWidth = (int)DpiHelper.TransformToDeviceX(mainVisual, SystemParameters.PrimaryScreenWidth);
var screenHeight = (int)DpiHelper.TransformToDeviceY(mainVisual, SystemParameters.PrimaryScreenHeight);
var locationX = (int)locationFromScreen.X % screenWidth;
var locationY = (int)locationFromScreen.Y % screenHeight;
double offsetX;
const int rtlHorizontalOffset = 20;
if (FlowDirection == FlowDirection.LeftToRight)
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual, offset.X);
}
else
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual,
offset.X - targetSize.Width - rtlHorizontalOffset);
}
return(new PositioningData(
mainVisual, offsetX,
popupSize, targetSize,
locationX, locationY,
screenHeight, screenWidth));
}
private CustomPopupPlacement[] ComboBoxCustomPopupPlacementCallback(
Size popupSize, Size targetSize, Point offset)
{
var visualAncestry = PlacementTarget.GetVisualAncestry().ToList();
SetupBackground(visualAncestry);
SetupVisiblePlacementWidth(visualAncestry);
var locationFromScreen = PlacementTarget.PointToScreen(new Point(0, 0));
var mainVisual = visualAncestry.OfType <Visual>().LastOrDefault();
if (mainVisual == null)
{
return(new CustomPopupPlacement[0]);
}
var screenWidth = (int)DpiHelper.TransformToDeviceX(mainVisual, SystemParameters.PrimaryScreenWidth);
var screenHeight = (int)DpiHelper.TransformToDeviceY(mainVisual, SystemParameters.PrimaryScreenHeight);
var locationX = (int)locationFromScreen.X % screenWidth;
var locationY = (int)locationFromScreen.Y % screenHeight;
var realOffsetX = (popupSize.Width - targetSize.Width) / 2.0;
double offsetX;
const int rtlHorizontalOffset = 20;
if (FlowDirection == FlowDirection.LeftToRight)
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual, offset.X);
}
else
{
offsetX = DpiHelper.TransformToDeviceX(mainVisual,
offset.X - targetSize.Width - rtlHorizontalOffset);
}
if (locationX + popupSize.Width - realOffsetX > screenWidth ||
locationX - realOffsetX < 0)
{
SetChildTemplateIfNeed(DefaultContentTemplate);
var defaultVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, DefaultVerticalOffset);
var newY = locationY + popupSize.Height > screenHeight
? -(defaultVerticalOffsetIndepent + popupSize.Height)
: defaultVerticalOffsetIndepent + targetSize.Height;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.Horizontal) });
}
if (locationY + popupSize.Height > screenHeight)
{
SetChildTemplateIfNeed(UpContentTemplate);
var upVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, UpVerticalOffset);
var newY = upVerticalOffsetIndepent - popupSize.Height + targetSize.Height;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.None) });
}
else
{
SetChildTemplateIfNeed(DownContentTemplate);
var downVerticalOffsetIndepent = DpiHelper.TransformToDeviceY(mainVisual, DownVerticalOffset);
var newY = downVerticalOffsetIndepent;
return(new[] { new CustomPopupPlacement(new Point(offsetX, newY), PopupPrimaryAxis.None) });
}
}
