/// <summary>
/// Event raised when the mouse is pressed down on a keyframe.
/// </summary>
private void Keyframe_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton != MouseButton.Left)
{
return;
}
FrameworkElement keyframe = (FrameworkElement)sender;
KeyframeViewModel keyframeViewmodel = (KeyframeViewModel)keyframe.DataContext;
isLeftMouseDownOnKeyframe = true;
if ((Keyboard.Modifiers & ModifierKeys.Control) != 0)
{
//
// Control key was held down.
// This means that the keyframe is being added to or removed
// from the existing selection. Don't do anything yet,
// we will act on this later in the MouseUp event handler.
//
isLeftMouseAndControlDownOnKeyframe = true;
}
else
{
//
// Control key is not held down.
//
isLeftMouseAndControlDownOnKeyframe = false;
if (this.listBox.SelectedItems.Count == 0)
{
//
// Nothing already selected, select the item.
//
this.listBox.SelectedItems.Add(keyframeViewmodel);
}
else if (this.listBox.SelectedItems.Contains(keyframeViewmodel))
{
//
// Item is already selected, do nothing.
// We will act on this in the MouseUp if there was no drag operation.
//
}
else
{
//
// Item is not selected.
// Deselect all, and select the item.
//
this.listBox.SelectedItems.Clear();
this.listBox.SelectedItems.Add(keyframeViewmodel);
}
}
keyframe.CaptureMouse();
origMouseDownPoint = e.GetPosition(GridContainer);
listBox.Focus();
Keyboard.Focus(listBox);
e.Handled = true;
}
/// <summary>
/// Event raised when the mouse is released on a keyframe.
/// </summary>
private void Keyframe_MouseUp(object sender, MouseButtonEventArgs e)
{
if (isLeftMouseDownOnKeyframe)
{
FrameworkElement keyframe = (FrameworkElement)sender;
KeyframeViewModel keyframeViewModel = (KeyframeViewModel)keyframe.DataContext;
if (!isDraggingKeyframe)
{
//
// Execute mouse up selection logic only if there was no drag operation.
//
if (isLeftMouseAndControlDownOnKeyframe)
{
//
// Control key was held down.
// Toggle the selection.
//
if (this.listBox.SelectedItems.Contains(keyframeViewModel))
{
//
// Item was already selected, control-click removes it from the selection.
//
this.listBox.SelectedItems.Remove(keyframeViewModel);
}
else
{
//
// Item was not already selected, control-click adds it to the selection.
//
this.listBox.SelectedItems.Add(keyframeViewModel);
}
}
else
{
//
// Control key was not held down.
//
if (this.listBox.SelectedItems.Count == 1 &&
this.listBox.SelectedItem == keyframeViewModel)
{
//
// The item that was clicked is already the only selected item.
// Don't need to do anything.
//
}
else
{
//
// Clear the selection and select the clicked item as the only selected item.
//
this.listBox.SelectedItems.Clear();
this.listBox.SelectedItems.Add(keyframeViewModel);
}
}
}
else
{
Debug.WriteLine("Frames Moved " + currentOperationFramesDragged);
bool hasKeyConflict = false;
foreach (KeyframeViewModel key in this.listBox.SelectedItems)
{
int newTime = key.Time + currentOperationFramesDragged;
if (Keyframes.Any(x => x.Time == newTime))
{
hasKeyConflict = true;
}
key.IsDragging = false;
}
//Check if we can just move the keys or if we need to prompt the user
if (!hasKeyConflict)
{
}
else
{
MessageBoxResult confirmBox = MessageBox.Show("One or more of the dragged keyframes will overwrite an existing keyframe", "Overwrite keyframes", MessageBoxButton.OKCancel);
if (confirmBox == MessageBoxResult.Yes)
{
Debug.WriteLine("Overwriting");
}
else
{
Debug.WriteLine("Dont overwrite");
double stepSize = (ActualWidth - keyFrameTicksPadding * 2) / (TimeRangeEnd - TimeRangeStart);
//TODO Fix with Time instead of explicit offset
//foreach (KeyframeViewModel key in this.listBox.SelectedItems)
//{
// key.TimelinePositionX = stepSize * currentOperationFramesDragged;
//}
}
}
}
keyframe.ReleaseMouseCapture();
isLeftMouseDownOnKeyframe = false;
isLeftMouseAndControlDownOnKeyframe = false;
e.Handled = true;
}
isDraggingKeyframe = false;
currentDeltaStepDistance = 0;
currentOperationFramesDragged = 0;
}
private void RemoveKeyframes(KeyframeViewModel keyVM)
{
}
private void AddKeyframes(KeyframeViewModel keyVM)
{
keyItems.Add(keyVM);
}