/// <summary>
/// Prepares a panel for the UI. Override for hooking custom events.
/// </summary>
/// <param name="panel">The panel to prepare.</param>
protected virtual void PreparePanel(DragDockPanel panel)
{
// Hook up panel events
panel.DragStarted +=
new DragEventHander(DragDockPanel_DragStarted);
panel.DragFinished +=
new DragEventHander(DragDockPanel_DragFinished);
panel.DragMoved +=
new DragEventHander(DragDockPanel_DragMoved);
panel.Maximized +=
new EventHandler(DragDockPanel_Maximized);
panel.Restored +=
new EventHandler(DragDockPanel_Restored);
if (panel.PanelState == PanelState.Maximized)
{
maximizedPanel = panel;
foreach (DragDockPanel dragDockPanel in panels)
{
if (panel != dragDockPanel)
{
dragDockPanel.Minimize();
}
}
}
}
/// <summary>
/// Maximises a panel.
/// </summary>
/// <param name="sender">the panel to maximise.</param>
/// <param name="e">Event args.</param>
private void DragDockPanel_Maximized(object sender, EventArgs e)
{
DragDockPanel maximizedPanel = sender as DragDockPanel;
// Store max'ed panel
this.maximizedPanel = maximizedPanel;
// Loop through children to disable dragging
foreach (UIElement child in panels)
{
DragDockPanel panel =
child as DragDockPanel;
panel.DraggingEnabled = false;
if (panel != maximizedPanel)
{
panel.Minimize();
}
}
// Update sizes and layout
AnimatePanelSizes();
AnimatePanelLayout();
}
/// <summary>
/// Keeps a reference to the dragging panel.
/// </summary>
/// <param name="sender">The dragging panel.</param>
/// <param name="args">Drag event args.</param>
private void DragDockPanel_DragStarted(object sender, DragEventArgs args)
{
DragDockPanel panel = sender as DragDockPanel;
// Keep reference to dragging panel
draggingPanel = panel;
}
/// <summary>
/// Drops the dragging panel.
/// </summary>
/// <param name="sender">The dragging panel.</param>
/// <param name="args">Drag event args.</param>
private void DragDockPanel_DragFinished(object sender, DragEventArgs args)
{
// Set dragging panel back to null
draggingPanel = null;
// Update the layout (to reset all panel positions)
UpdatePanelLayout();
}
/// <summary>
/// Unprepares a drag dock panel.
/// </summary>
/// <param name="element">The source drag dock panel.</param>
/// <param name="item">The source item.</param>
protected override void ClearContainerForItemOverride(DependencyObject element, object item)
{
base.ClearContainerForItemOverride(element, item);
DragDockPanel panel = element as DragDockPanel;
UnpreparePanel(panel);
panels.Remove(panel);
SetRowsAndColumns(GetOrderedPanels());
AnimatePanelSizes();
AnimatePanelLayout();
}
/// <summary>
/// Shuffles the panels around.
/// </summary>
/// <param name="sender">The dragging panel.</param>
/// <param name="args">Drag event args.</param>
private void DragDockPanel_DragMoved(object sender, DragEventArgs args)
{
Point mousePosInHost =
args.MouseEventArgs.GetPosition(this);
int currentRow =
(int)Math.Floor(mousePosInHost.Y /
(ActualHeight / (double)rows));
int currentColumn =
(int)Math.Floor(mousePosInHost.X /
(ActualWidth / (double)columns));
// Stores the panel we will swap with
DragDockPanel swapPanel = null;
// Loop through children to see if there is a panel to swap with
foreach (UIElement child in panels)
{
DragDockPanel panel = child as DragDockPanel;
// If the panel is not the dragging panel and is in the current row
// or current column... mark it as the panel to swap with
if (panel != draggingPanel &&
Grid.GetColumn(panel) == currentColumn &&
Grid.GetRow(panel) == currentRow)
{
swapPanel = panel;
break;
}
}
// If there is a panel to swap with
if (swapPanel != null)
{
// Store the new row and column
int draggingPanelNewColumn = Grid.GetColumn(swapPanel);
int draggingPanelNewRow = Grid.GetRow(swapPanel);
// Update the swapping panel row and column
Grid.SetColumn(swapPanel, Grid.GetColumn(draggingPanel));
Grid.SetRow(swapPanel, Grid.GetRow(draggingPanel));
// Update the dragging panel row and column
Grid.SetColumn(draggingPanel, draggingPanelNewColumn);
Grid.SetRow(draggingPanel, draggingPanelNewRow);
// Animate the layout to the new positions
AnimatePanelLayout();
}
}
/// <summary>
/// Puts all of the panel back to a grid view.
/// </summary>
/// <param name="sender">The minimising panel.</param>
/// <param name="e">Event args.</param>
private void DragDockPanel_Restored(object sender, EventArgs e)
{
// Set max'ed panel to null
maximizedPanel = null;
// Loop through children to disable dragging
foreach (UIElement child in panels)
{
DragDockPanel panel =
child as DragDockPanel;
panel.Restore();
panel.DraggingEnabled = true;
}
// Update sizes and layout
AnimatePanelSizes();
AnimatePanelLayout();
}
/// <summary>
/// Updates the layout when in design mode.
/// </summary>
/// <param name="sender">The drag dock panel host.</param>
/// <param name="e">Event Args.</param>
private void DragDockPanelHost_LayoutUpdated(object sender, EventArgs e)
{
if (System.ComponentModel.DesignerProperties.GetIsInDesignMode(this))
{
Dictionary <int, DragDockPanel> orderedPanels = new Dictionary <int, DragDockPanel>();
for (int i = 0; i < panels.Count; i++)
{
if (panels[i].GetType() == typeof(DragDockPanel))
{
DragDockPanel panel = (DragDockPanel)panels[i];
orderedPanels.Add(i, panel);
}
}
SetRowsAndColumns(orderedPanels);
UpdatePanelLayout();
}
}
/// <summary>
/// Unprepares a panel for the UI. Override for hooking custom events.
/// </summary>
/// <param name="panel">The panel to prepare.</param>
protected virtual void UnpreparePanel(DragDockPanel panel)
{
if (panel.PanelState == PanelState.Maximized)
{
DragDockPanel_Restored(null, null);
}
// Hook up panel events
panel.DragStarted -=
new DragEventHander(DragDockPanel_DragStarted);
panel.DragFinished -=
new DragEventHander(DragDockPanel_DragFinished);
panel.DragMoved -=
new DragEventHander(DragDockPanel_DragMoved);
panel.Maximized -=
new EventHandler(DragDockPanel_Maximized);
panel.Restored -=
new EventHandler(DragDockPanel_Restored);
}
/// <summary>
/// Pepares a drag dock panel.
/// </summary>
/// <param name="element">The drag dock panel.</param>
/// <param name="item">The source item.</param>
protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
{
base.PrepareContainerForItemOverride(element, item);
DragDockPanel panel = element as DragDockPanel;
if (panel.Style == null && DefaultPanelStyle != null)
{
panel.Style = DefaultPanelStyle;
}
Dictionary <int, DragDockPanel> orderedPanels = GetOrderedPanels();
orderedPanels.Add(panels.Count, panel);
panels.Add(panel);
PreparePanel(panel);
SetRowsAndColumns(orderedPanels);
AnimatePanelSizes();
AnimatePanelLayout();
}
/// <summary>
/// Gets the panels in order.
/// </summary>
/// <returns>The ordered panels.</returns>
private Dictionary <int, DragDockPanel> GetOrderedPanels()
{
Dictionary <int, DragDockPanel> orderedPanels = new Dictionary <int, DragDockPanel>();
List <DragDockPanel> addedPanels = new List <DragDockPanel>();
for (int i = 0; i < panels.Count; i++)
{
DragDockPanel lowestPanel = null;
foreach (DragDockPanel panel in panels)
{
if (!addedPanels.Contains(panel) && (lowestPanel == null || ((Grid.GetRow(panel) * columns) + Grid.GetColumn(panel) < (Grid.GetRow(lowestPanel) * columns) + Grid.GetColumn(lowestPanel))))
{
lowestPanel = panel;
}
}
addedPanels.Add(lowestPanel);
orderedPanels.Add(i, lowestPanel);
}
return(orderedPanels);
}
/// <summary>
/// Animate the panel positions
/// </summary>
private void AnimatePanelLayout()
{
if (double.IsInfinity(ActualWidth) || double.IsNaN(ActualWidth) || ActualWidth == 0)
{
return;
}
// If we are not in max'ed panel mode...
if (maximizedPanel == null)
{
// Loop through children and size to row and columns
foreach (UIElement child in panels)
{
DragDockPanel panel = (DragDockPanel)child;
if (panel != draggingPanel)
{
panel.AnimatePosition(
(Grid.GetColumn(panel) * (ActualWidth / (double)columns)),
(Grid.GetRow(panel) * (ActualHeight / (double)rows)));
}
}
}
else
{
Dictionary <int, DragDockPanel> orderedPanels = new Dictionary <int, DragDockPanel>();
// Loop through children to order them according to their
// current row and column...
foreach (UIElement child in panels)
{
DragDockPanel panel = (DragDockPanel)child;
orderedPanels.Add(
(Grid.GetRow(panel) * columns) + Grid.GetColumn(panel),
panel);
}
// Set initial top of minimized panels to 0
double currentOffset = 0.0;
// For each of the panels (as ordered in the grid)
for (int i = 0; i < orderedPanels.Count; i++)
{
// If the current panel is not the maximized panel
if (orderedPanels[i] != maximizedPanel)
{
double newX = 0;
double newY = currentOffset;
#region determin new docking coordinates
if (minimizedPosition.Equals(MinimizedPositions.Right))
{
newX = ActualWidth - minimizedColumnWidth;
newY = currentOffset;
}
else if (minimizedPosition.Equals(MinimizedPositions.Left))
{
newX = 0;
newY = currentOffset;
}
else if (minimizedPosition.Equals(MinimizedPositions.Bottom))
{
newX = currentOffset;
newY = ActualHeight - minimizedRowHeight;
}
else if (minimizedPosition.Equals(MinimizedPositions.Top))
{
newX = currentOffset;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newX = ActualWidth / 2;
newY = ActualHeight / 2;
}
#endregion
// Animate the position
orderedPanels[i].AnimatePosition(
newX,
newY);
if (minimizedPosition.Equals(MinimizedPositions.Left) || minimizedPosition.Equals(MinimizedPositions.Right))
{
// Increment current top
currentOffset += ActualHeight / (double)(panels.Count - 1);
}
else
{
// Increment current left
currentOffset += ActualWidth / (double)(panels.Count - 1);
}
}
else
{
#region determine new docking position
double newX = 0;
double newY = 0;
if (minimizedPosition.Equals(MinimizedPositions.Right))
{
newX = 0;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Left))
{
newX = minimizedColumnWidth;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Bottom))
{
newX = 0;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Top))
{
newX = 0;
newY = minimizedRowHeight;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newX = 0;
newY = 0;
}
#endregion
// Animate maximized panel
orderedPanels[i].AnimatePosition(newX, newY);
}
}
}
}
/// <summary>
/// Animates the panel sizes
/// </summary>
private void AnimatePanelSizes()
{
if (double.IsInfinity(ActualWidth) || double.IsNaN(ActualWidth) || ActualWidth == 0)
{
return;
}
// If there is not a maxmized panel...
if (maximizedPanel == null)
{
// Animate the panel sizes to row / column sizes
foreach (UIElement child in panels)
{
DragDockPanel panel = (DragDockPanel)child;
double width = (ActualWidth / (double)columns) - panel.Margin.Left - panel.Margin.Right;
double height = (ActualHeight / (double)rows) - panel.Margin.Top - panel.Margin.Bottom;
if (width < 0)
{
width = 0;
}
if (height < 0)
{
height = 0;
}
panel.AnimateSize(
width,
height);
}
}
else
{
// Loop through the children
foreach (UIElement child in panels)
{
DragDockPanel panel =
(DragDockPanel)child;
// Set the size of the non
// maximized children
if (panel != maximizedPanel)
{
#region determine new width & height depending on docking axis
double newWidth = minimizedColumnWidth - panel.Margin.Left - panel.Margin.Right;
double newHeight = (ActualHeight / (double)(panels.Count - 1)) - panel.Margin.Top - panel.Margin.Bottom;
if (minimizedPosition.Equals(MinimizedPositions.Bottom) || minimizedPosition.Equals(MinimizedPositions.Top))
{
newWidth = (ActualWidth / (double)(panels.Count - 1)) - panel.Margin.Left - panel.Margin.Right;
newHeight = minimizedRowHeight - panel.Margin.Top - panel.Margin.Bottom;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newWidth = newHeight = 0;
}
#endregion
if (newHeight < 0)
{
newHeight = 0;
}
if (newWidth < 0)
{
newWidth = 0;
}
panel.AnimateSize(
newWidth,
newHeight);
}
else
{
#region determine new width & height depending on docking axis
double newWidth = ActualWidth - minimizedColumnWidth - panel.Margin.Left - panel.Margin.Right;
double newHeight = ActualHeight - panel.Margin.Top - panel.Margin.Bottom;
if (minimizedPosition.Equals(MinimizedPositions.Bottom) || minimizedPosition.Equals(MinimizedPositions.Top))
{
newWidth = ActualWidth - panel.Margin.Left - panel.Margin.Right;
newHeight = ActualHeight - minimizedRowHeight - panel.Margin.Top - panel.Margin.Bottom;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newWidth = ActualWidth - panel.Margin.Right - panel.Margin.Left;
newHeight = ActualHeight - panel.Margin.Bottom - panel.Margin.Top;
}
#endregion
if (newHeight < 0)
{
newHeight = 0;
}
if (newWidth < 0)
{
newWidth = 0;
}
panel.AnimateSize(
newWidth,
newHeight);
}
}
}
}
/// <summary>
/// Updates the panel layout without animation
/// This does size and position without animation
/// </summary>
private void UpdatePanelLayout()
{
if (double.IsInfinity(ActualWidth) || double.IsNaN(ActualWidth) || ActualWidth == 0)
{
return;
}
// If we are not in max'ed panel mode...
if (maximizedPanel == null)
{
// Layout children as per rows and columns
foreach (UIElement child in panels)
{
DragDockPanel panel = (DragDockPanel)child;
Canvas.SetLeft(
panel,
(Grid.GetColumn(panel) * (ActualWidth / (double)columns)));
Canvas.SetTop(
panel,
(Grid.GetRow(panel) * (ActualHeight / (double)rows)));
double width = (ActualWidth / (double)columns) - panel.Margin.Left - panel.Margin.Right;
double height = (ActualHeight / (double)rows) - panel.Margin.Top - panel.Margin.Bottom;
if (width < 0)
{
width = 0;
}
if (height < 0)
{
height = 0;
}
panel.Width = width;
panel.Height = height;
}
}
else
{
Dictionary <int, DragDockPanel> orderedPanels = new Dictionary <int, DragDockPanel>();
// Loop through children to order them according to their
// current row and column...
foreach (UIElement child in panels)
{
DragDockPanel panel = (DragDockPanel)child;
orderedPanels.Add(
(Grid.GetRow(panel) * columns) + Grid.GetColumn(panel),
panel);
}
// Set initial top of minimized panels to 0
double currentOffset = 0.0;
// For each of the panels (as ordered in the grid)
for (int i = 0; i < orderedPanels.Count; i++)
{
// If the current panel is not the maximized panel
if (orderedPanels[i] != maximizedPanel)
{
#region determine new width & height depending on docking axis
double newWidth = minimizedColumnWidth - orderedPanels[i].Margin.Left - orderedPanels[i].Margin.Right;
double newHeight = (ActualHeight / (double)(panels.Count - 1)) - orderedPanels[i].Margin.Top - orderedPanels[i].Margin.Bottom;
if (minimizedPosition.Equals(MinimizedPositions.Bottom) || minimizedPosition.Equals(MinimizedPositions.Top))
{
newWidth = (ActualWidth / (double)(panels.Count - 1)) - orderedPanels[i].Margin.Left - orderedPanels[i].Margin.Right;
newHeight = minimizedRowHeight - orderedPanels[i].Margin.Top - orderedPanels[i].Margin.Bottom;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newWidth = 0;
newHeight = 0;
}
#endregion
if (newHeight < 0)
{
newHeight = 0;
}
if (newWidth < 0)
{
newWidth = 0;
}
// Set the size of the panel
orderedPanels[i].Width = newWidth;
orderedPanels[i].Height = newHeight;
double newX = 0;
double newY = currentOffset;
#region determin new docking coordinates
if (minimizedPosition.Equals(MinimizedPositions.Right))
{
newX = ActualWidth - minimizedColumnWidth;
newY = currentOffset;
}
else if (minimizedPosition.Equals(MinimizedPositions.Left))
{
newX = 0;
newY = currentOffset;
}
else if (minimizedPosition.Equals(MinimizedPositions.Bottom))
{
newX = currentOffset;
newY = ActualHeight - minimizedRowHeight;
}
else if (minimizedPosition.Equals(MinimizedPositions.Top))
{
newX = currentOffset;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newX = ActualWidth / 2;
newY = ActualHeight / 2;
}
#endregion
// Set the position of the panel
Canvas.SetLeft(orderedPanels[i], newX);
Canvas.SetTop(orderedPanels[i], newY);
if (minimizedPosition.Equals(MinimizedPositions.Left) || minimizedPosition.Equals(MinimizedPositions.Right))
{
// Increment current top
currentOffset += ActualHeight / (double)(panels.Count - 1);
}
else
{
// Increment current left
currentOffset += ActualWidth / (double)(panels.Count - 1);
}
}
else
{
#region determine new width & height depending on docking axis
double newWidth = ActualWidth - minimizedColumnWidth - orderedPanels[i].Margin.Left - orderedPanels[i].Margin.Right;
double newHeight = ActualHeight - orderedPanels[i].Margin.Top - orderedPanels[i].Margin.Bottom;
if (minimizedPosition.Equals(MinimizedPositions.Bottom) || minimizedPosition.Equals(MinimizedPositions.Top))
{
newWidth = ActualWidth - orderedPanels[i].Margin.Left - orderedPanels[i].Margin.Right;
newHeight = ActualHeight - minimizedRowHeight - orderedPanels[i].Margin.Top - orderedPanels[i].Margin.Bottom;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newWidth = ActualWidth - orderedPanels[i].Margin.Right - orderedPanels[i].Margin.Left;
newHeight = ActualHeight - orderedPanels[i].Margin.Bottom - orderedPanels[i].Margin.Top;
}
#endregion
if (newHeight < 0)
{
newHeight = 0;
}
if (newWidth < 0)
{
newWidth = 0;
}
// Set the size of the panel
orderedPanels[i].Width = newWidth;
orderedPanels[i].Height = newHeight;
#region determine new docking position
double newX = 0;
double newY = 0;
if (minimizedPosition.Equals(MinimizedPositions.Right))
{
newX = 0;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Left))
{
newX = minimizedColumnWidth;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Bottom))
{
newX = 0;
newY = 0;
}
else if (minimizedPosition.Equals(MinimizedPositions.Top))
{
newX = 0;
newY = minimizedRowHeight;
}
else if (minimizedPosition.Equals(MinimizedPositions.None))
{
newX = 0;
newY = 0;
}
#endregion
// Set the position of the panel
Canvas.SetLeft(orderedPanels[i], newX);
Canvas.SetTop(orderedPanels[i], newY);
}
}
}
}