/// <summary>
/// Initializes a new instance of a <see cref="ManipulationBehavior"/> class.
/// </summary>
/// <param name="pZoomAndPanControl">The manipulated control.</param>
public ManipulationBehavior(ZoomAndPanControl pZoomAndPanControl)
{
this.mZoomAndPanControl = pZoomAndPanControl;
this.mZoomAndPanControl.MouseDown += this.OnZoomAndPanControlMouseDown;
this.mZoomAndPanControl.MouseMove += this.OnZoomAndPanControlMouseMove;
this.mZoomAndPanControl.MouseUp += this.OnZoomAndPanControlMouseUp;
this.mZoomAndPanControl.PreviewMouseWheel += this.OnZoomAndPanControlMouseWheel;
FrameworkElement lContent = this.mZoomAndPanControl.Content as FrameworkElement;
if (lContent != null)
{
lContent.MouseWheel += this.OnZoomAndPanControlMouseWheel;
}
this.mMouseHandlingMode = MouseHandlingMode.None;
}
/// <summary>
/// Called when a template has been applied to the control.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.mZoomAndPanControl = this.GetTemplateChild(PART_ZOOM_AND_PAN_CONTROL) as ZoomAndPanControl;
if (this.mZoomAndPanControl == null)
{
throw new Exception("TooledZoomAndPanControl control template not correctly defined.");
}
this.mManipulationBehavior = new ManipulationBehavior(this.mZoomAndPanControl);
// Toolbar is not mandatory.
IZoomAndPanToolbar lZoomAndPanToolbar = this.GetTemplateChild(PART_TOOLBAR) as IZoomAndPanToolbar;
if (lZoomAndPanToolbar != null)
{
lZoomAndPanToolbar.BindToControl(this.mZoomAndPanControl);
}
}
/// <summary>
/// Event raised when the 'ContentOffsetY' property has changed value.
/// </summary>
private static void OnContentOffsetYChanged(DependencyObject pObject, DependencyPropertyChangedEventArgs pEventArgs)
{
ZoomAndPanControl lControl = pObject as ZoomAndPanControl;
if (lControl != null)
{
lControl.UpdateTranslationY();
if (lControl.mDisableContentFocusSync == false)
{
// Normally want to automatically update content focus when content offset changes.
// Although this is disabled using 'disableContentFocusSync' when content offset changes due to in-progress zooming.
lControl.UpdateContentZoomFocusY();
}
if (lControl.mDisableScrollOffsetSync == false && lControl.ScrollOwner != null)
{
// Notify the owning ScrollViewer that the scrollbar offsets should be updated.
lControl.ScrollOwner.InvalidateScrollInfo();
}
}
}
/// <summary>
/// Called when a template has been applied to the control.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.mZoomAndPanControl = this.GetTemplateChild(PART_ZOOM_AND_PAN_CONTROL) as ZoomAndPanControl;
if (this.mZoomAndPanControl == null)
{
throw new Exception("TooledZoomAndPanControl control template not correctly defined.");
}
this.mManipulationBehavior = new ManipulationBehavior(this.mZoomAndPanControl);
// Toolbar is not mandatory.
IZoomAndPanToolbar lZoomAndPanToolbar = this.GetTemplateChild(PART_TOOLBAR) as IZoomAndPanToolbar;
if (lZoomAndPanToolbar != null)
{
lZoomAndPanToolbar.BindToControl(this.mZoomAndPanControl);
}
}
/// <summary>
/// Called when a template has been applied to the control.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.mZoomAndPanControl = this.GetTemplateChild(PART_ZOOM_AND_PAN_CONTROL) as ZoomAndPanControl;
this.mViewportOverview = this.GetTemplateChild(PART_VIEWPORT_OVERVIEW) as ViewportOverview;
if (this.mZoomAndPanControl == null || this.mViewportOverview == null)
{
throw new Exception("OverviewControl control template not correctly defined.");
}
this.mZoomAndPanControl.SizeChanged += this.OnZoomAndPanControlSizeChanged;
this.mViewportOverview.DragDelta += this.OnViewportOverviewDragDelta;
}