private void OnPreviewMouseMoveWhileCaptured(object sender, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
if (!((Mouse.Captured is ComboBox && ((ComboBox)Mouse.Captured).IsDropDownOpen))) //Combo boxes require non-pressed capture behaviour while popped up to work properly.
{
if (Mouse.Captured != null)
{
Mouse.Captured.ReleaseMouseCapture();
}
OnLostMouseCapture(e);
}
}
else
{
//Shift the mouse with the panel being moved, so that the resize remains relative to it.
ArtPanel panel = GetArtPanel(e.OriginalSource);
if (panel != null)
{
panel.BringIntoView(); //Ensure the panel remains in view
Point newOffset = panel.TranslatePoint(new Point(), this);
Vector offsetDelta = newOffset - mPanelResizeDragOffset;
if (offsetDelta.Length > 1)
{
MoveMousePosition(offsetDelta);
mPanelResizeDragOffset = newOffset;
e.Handled = true;
}
}
}
}
protected override void OnLostMouseCapture(MouseEventArgs e)
{
base.OnLostMouseCapture(e);
PreviewMouseMove -= OnPreviewMouseMoveWhileCaptured;
Suspended = false;
ArtPanel panel = GetArtPanel(e.OriginalSource);
if (panel != null)
{
if (panel.Parent == null)
{
//The panel has been removed (probably due to image size changed), so find the new panel for that album art, and bring that into view instead
ContentPresenter contentPresenter = ItemContainerGenerator.ContainerFromItem(panel.AlbumArt) as ContentPresenter;
if (contentPresenter != null)
{
contentPresenter.BringIntoView();
}
}
else
{
panel.BringIntoView(); //Ensure the panel remains in view
}
}
}
private static object CoerceIsSaved(DependencyObject sender, object value)
{
ArtPanel artPanel = (ArtPanel)sender;
if (artPanel.FilePathEditor != null && artPanel.FilePathTextBox != null &&
artPanel.FilePathEditor.Visibility == Visibility.Visible && artPanel.FilePathTextBox.Text != artPanel.AlbumArt.FilePath)
{
return(false); //Always appear unsaved when editing
}
return(value);
}
private static object CoerceThumbSize(DependencyObject sender, object value)
{
ArtPanel artPanel = (ArtPanel)sender;
if (artPanel.InformationLocation == InformationLocation.Bottom && artPanel.ActualHeight > 0)
{
//Take up the full width available
//(This has to match the Grid MinWidth calculation)
return(artPanel.ActualWidth - artPanel.PanelResizer.ActualWidth - 10);
}
return(value);
}
private static void OnInformationLocationChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
ArtPanel artPanel = (ArtPanel)sender;
artPanel.CoerceValue(ThumbSizeProperty);
if ((InformationLocation)e.NewValue == InformationLocation.Right)
{
//If switching to Right, and the Information panel has disappeared, make sure it is at least visible
if (artPanel.Width - artPanel.ThumbSize < 30)
{
artPanel.Width = artPanel.ThumbSize + artPanel.mMinimumGridSizeForLabelColumn + 10;
}
}
}
protected override void OnGotMouseCapture(MouseEventArgs e)
{
base.OnGotMouseCapture(e);
Suspended = true;
ArtPanel panel = GetArtPanel(e.OriginalSource);
if (panel != null)
{
mPanelResizeDragOffset = panel.TranslatePoint(new Point(), this);
PreviewMouseMove += OnPreviewMouseMoveWhileCaptured;
}
}
private double GetNearestArrangedPanelWidth(double panelWidth)
{
int numberOfPanels = (int)Math.Round(ItemsPresenter.ActualWidth / panelWidth, MidpointRounding.AwayFromZero);
double newPanelWidth = ItemsPresenter.ActualWidth / numberOfPanels;
ContentPresenter firstItemContentPresenter = (ContentPresenter)ItemContainerGenerator.ContainerFromIndex(0);
if (firstItemContentPresenter != null) //Will be null if there are no items shown.
{
ArtPanel firstArtPanel = GetArtPanelFromContentPresenter(firstItemContentPresenter);
if (numberOfPanels > 1 && newPanelWidth < firstArtPanel.MinWidth)
{
//Can't fit the panels at this size, as it is under the minimum size, so decrease the number of panels by one, and recalc.
newPanelWidth = ItemsPresenter.ActualWidth / --numberOfPanels;
//Should always now fit, as this is the equivalent of rounding up instead of down.
}
}
return(newPanelWidth);
}