/// <summary>
/// Invoked whenever application code or internal processes (such as a rebuilding layout pass) call ApplyTemplate. In simplest terms, this means the method is called just before a UI element displays in your app. Override this method to influence the default post-template logic of a class.
/// </summary>
protected override void OnApplyTemplate()
{
// Code might use some null reference checks here.
this.layoutRoot = this.GetTemplateChild(LayoutRootPartName) as Grid;
this.selectRegion = this.GetTemplateChild(SelectRegionPartName) as Path;
this.selectRegion.ManipulationMode = ManipulationModes.Scale | ManipulationModes.TranslateX | ManipulationModes.TranslateY;
selectedRegion = new SelectedRegion {
MinSelectRegionSize = 2 * CornerSize
};
this.DataContext = selectedRegion;
this.topLeftCorner = this.GetTemplateChild(TopLeftCornerPartName) as ContentControl;
this.topRightCorner = this.GetTemplateChild(TopRightCornerPartName) as ContentControl;
this.bottomLeftCorner = this.GetTemplateChild(BottomLeftCornerPartName) as ContentControl;
this.bottomRightCorner = this.GetTemplateChild(BottomRightCornerPartName) as ContentControl;
this.imageCanvas = this.GetTemplateChild(ImageCanvasPartName) as Canvas;
this.sourceImage = this.GetTemplateChild(SourceImagePartName) as Image;
// Handle the pointer events of the corners.
AddCornerEvents(this.topLeftCorner);
AddCornerEvents(this.topRightCorner);
AddCornerEvents(this.bottomLeftCorner);
AddCornerEvents(this.bottomRightCorner);
// Handle the manipulation events of the selectRegion
this.selectRegion.ManipulationDelta += SelectRegion_ManipulationDelta;
this.selectRegion.ManipulationCompleted += SelectRegion_ManipulationCompleted;
this.sourceImage.SizeChanged += SourceImage_SizeChanged;
}
/// <summary>
/// Template to manage crop selection of image.
/// </summary>
protected override void OnApplyTemplate()
{
base.OnApplyTemplate();
_layoutRoot = GetTemplateChild("PART_LayoutRoot") as Grid;
_selectRegion = GetTemplateChild("PART_SelectRegion") as Path;
_selectRegion.ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY;
_selectedRegion = new SelectedRegion {
MinSelectRegionSize = AppEnvironment.DefaultMinimumCropDimension
};
DataContext = _selectedRegion;
_sourceImage = GetTemplateChild("PART_SourceImage") as Image;
_imageCanvas = GetTemplateChild("PART_ImageCanvas") as Canvas;
_topLeftCorner = GetTemplateChild("PART_TopLeftCorner") as ContentControl;
_topRightCorner = GetTemplateChild("PART_TopRightCorner") as ContentControl;
_bottomLeftCorner = GetTemplateChild("PART_BottomLeftCorner") as ContentControl;
_bottomRightCorner = GetTemplateChild("PART_BottomRightCorner") as ContentControl;
// Handle the pointer events of the corners.
AddCornerEvents(_topLeftCorner);
AddCornerEvents(_topRightCorner);
AddCornerEvents(_bottomLeftCorner);
AddCornerEvents(_bottomRightCorner);
// Handle the manipulation events of the selectRegion
_selectRegion.ManipulationDelta += SelectRegion_ManipulationDelta;
_selectRegion.ManipulationCompleted += SelectRegion_ManipulationCompleted;
_sourceImage.SizeChanged += sourceImage_SizeChanged;
}