/// <summary>
/// Dependency property event once the focused mdi child has changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
private static void ActiveMdiChildValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var mdiContainer = (MdiContainer) sender;
MdiChild newChild = (MdiChild) e.NewValue,
oldChild = (MdiChild) e.OldValue;
if (newChild == null || newChild == oldChild)
return;
if (oldChild != null && oldChild.WindowState == WindowState.Maximized)
newChild.WindowState = WindowState.Maximized;
int maxZindex = 0;
for (int i = 0; i < mdiContainer.Children.Count; i++)
{
int zindex = Panel.GetZIndex(mdiContainer.Children[i]);
if (zindex > maxZindex)
maxZindex = zindex;
if (mdiContainer.Children[i] != newChild)
mdiContainer.Children[i].Focused = false;
else
newChild.Focused = true;
}
Panel.SetZIndex(newChild, maxZindex + 1);
if (mdiContainer.MdiChildTitleChanged != null)
mdiContainer.MdiChildTitleChanged(mdiContainer, new RoutedEventArgs());
}
public void AddChild(Behaviors.Bot bot)
{
var child = new MdiChild();
child.Title = "Bot";
child.Content = new BotControl(bot);
child.Closed += OnChildClosed;
MdiContainer.Children.Add(child);
}
/// <summary>
/// Handles the SizeChanged event of the MdiContainer control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.SizeChangedEventArgs"/> instance containing the event data.</param>
private void MdiContainer_SizeChanged(object sender, SizeChangedEventArgs e)
{
if (Children.Count == 0)
return;
for (int i = 0; i < Children.Count; i++)
{
MdiChild mdiChild = Children[i];
if (mdiChild.WindowState == WindowState.Maximized)
{
mdiChild.Width = ActualWidth;
mdiChild.Height = ActualHeight;
}
if (mdiChild.WindowState == WindowState.Minimized)
{
mdiChild.Position = new Point(mdiChild.Position.X, mdiChild.Position.Y + e.NewSize.Height - e.PreviousSize.Height);
}
}
}
/// <summary>
/// Handles the CollectionChanged event of the Children control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Collections.Specialized.NotifyCollectionChangedEventArgs"/> instance containing the event data.</param>
private void Children_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
{
MdiChild mdiChild = Children[e.NewStartingIndex],
topChild = ActiveMdiChild;
if (topChild != null && topChild.WindowState == WindowState.Maximized)
mdiChild.Loaded += (s, a) => mdiChild.WindowState = WindowState.Maximized;
mdiChild.Loaded += (s, a) => ActiveMdiChild = mdiChild;
if (mdiChild.Position.X < 0 || mdiChild.Position.Y < 0)
mdiChild.Position = new Point(m_windowOffset, m_windowOffset);
m_windowCanvas.Children.Add(mdiChild);
m_windowOffset += WindowOffset;
if (m_windowOffset + mdiChild.Width > ActualWidth)
m_windowOffset = 0;
if (m_windowOffset + mdiChild.Height > ActualHeight)
m_windowOffset = 0;
}
break;
case NotifyCollectionChangedAction.Remove:
{
var oldChild = (MdiChild) e.OldItems[0];
m_windowCanvas.Children.Remove(oldChild);
MdiChild newChild = GetTopChild();
ActiveMdiChild = newChild;
if (newChild != null && oldChild.WindowState == WindowState.Maximized)
newChild.WindowState = WindowState.Maximized;
}
break;
case NotifyCollectionChangedAction.Reset:
m_windowCanvas.Children.Clear();
break;
}
InvalidateSize();
}
/// <summary>
/// Invalidates the size checking to see if the furthest
/// child point exceeds the current height and width.
/// </summary>
internal void InvalidateSize()
{
var largestPoint = new Point(0, 0);
for (int i = 0; i < Children.Count; i++)
{
MdiChild mdiChild = Children[i];
var farPosition = new Point(mdiChild.Position.X + mdiChild.Width, mdiChild.Position.Y + mdiChild.Height);
if (farPosition.X > largestPoint.X)
largestPoint.X = farPosition.X;
if (farPosition.Y > largestPoint.Y)
largestPoint.Y = farPosition.Y;
}
if (m_windowCanvas.Width != largestPoint.X)
m_windowCanvas.Width = largestPoint.X;
if (m_windowCanvas.Height != largestPoint.Y)
m_windowCanvas.Height = largestPoint.Y;
}
/// <summary>
/// Dependency property event once the MDI layout value has changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
private static void MdiLayoutValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var mdiContainer = (MdiContainer) sender;
var value = (MdiLayout) e.NewValue;
if (value == MdiLayout.ArrangeIcons ||
mdiContainer.Children.Count < 1)
return;
// 1. WindowState.Maximized -> WindowState.Normal
List<MdiChild> minimizedWindows = new List<MdiChild>(),
normalWindows = new List<MdiChild>();
foreach (MdiChild mdiChild in mdiContainer.Children)
switch (mdiChild.WindowState)
{
case WindowState.Minimized:
minimizedWindows.Add(mdiChild);
break;
case WindowState.Maximized:
mdiChild.WindowState = WindowState.Normal;
normalWindows.Add(mdiChild);
break;
default:
normalWindows.Add(mdiChild);
break;
}
minimizedWindows.Sort(new MdiChildComparer());
normalWindows.Sort(new MdiChildComparer());
// 2. Arrange minimized windows
double containerHeight = mdiContainer.InnerHeight;
for (int i = 0; i < minimizedWindows.Count; i++)
{
MdiChild mdiChild = minimizedWindows[i];
int capacity = Convert.ToInt32(mdiContainer.ActualWidth)/MdiChild.MinimizedWidth,
row = i/capacity + 1,
col = i%capacity;
containerHeight = mdiContainer.InnerHeight - MdiChild.MinimizedHeight*row;
double newLeft = MdiChild.MinimizedWidth*col;
mdiChild.Position = new Point(newLeft, containerHeight);
}
// 3. Resize & arrange normal windows
switch (value)
{
case MdiLayout.Cascade:
{
double newWidth = mdiContainer.ActualWidth*0.58,
// should be non-linear formula here
newHeight = containerHeight*0.67,
windowOffset = 0;
foreach (MdiChild mdiChild in normalWindows)
{
if (mdiChild.Resizable)
{
mdiChild.Width = newWidth;
mdiChild.Height = newHeight;
}
mdiChild.Position = new Point(windowOffset, windowOffset);
windowOffset += WindowOffset;
if (windowOffset + mdiChild.Width > mdiContainer.ActualWidth)
windowOffset = 0;
if (windowOffset + mdiChild.Height > containerHeight)
windowOffset = 0;
}
}
break;
case MdiLayout.TileHorizontal:
{
int cols = (int) Math.Sqrt(normalWindows.Count),
rows = normalWindows.Count/cols;
var col_count = new List<int>(); // windows per column
for (int i = 0; i < cols; i++)
{
if (normalWindows.Count%cols > cols - i - 1)
col_count.Add(rows + 1);
else
col_count.Add(rows);
}
double newWidth = mdiContainer.ActualWidth/cols,
newHeight = containerHeight/col_count[0],
offsetTop = 0,
offsetLeft = 0;
for (int i = 0, col_index = 0, prev_count = 0; i < normalWindows.Count; i++)
{
if (i >= prev_count + col_count[col_index])
{
prev_count += col_count[col_index++];
offsetLeft += newWidth;
offsetTop = 0;
newHeight = containerHeight/col_count[col_index];
}
MdiChild mdiChild = normalWindows[i];
if (mdiChild.Resizable)
{
mdiChild.Width = newWidth;
mdiChild.Height = newHeight;
}
mdiChild.Position = new Point(offsetLeft, offsetTop);
offsetTop += newHeight;
}
}
break;
case MdiLayout.TileVertical:
{
int rows = (int) Math.Sqrt(normalWindows.Count),
cols = normalWindows.Count/rows;
var col_count = new List<int>(); // windows per column
for (int i = 0; i < cols; i++)
{
if (normalWindows.Count%cols > cols - i - 1)
col_count.Add(rows + 1);
else
col_count.Add(rows);
}
double newWidth = mdiContainer.ActualWidth/cols,
newHeight = containerHeight/col_count[0],
offsetTop = 0,
offsetLeft = 0;
for (int i = 0, col_index = 0, prev_count = 0; i < normalWindows.Count; i++)
{
if (i >= prev_count + col_count[col_index])
{
prev_count += col_count[col_index++];
offsetLeft += newWidth;
offsetTop = 0;
newHeight = containerHeight/col_count[col_index];
}
MdiChild mdiChild = normalWindows[i];
if (mdiChild.Resizable)
{
mdiChild.Width = newWidth;
mdiChild.Height = newHeight;
}
mdiChild.Position = new Point(offsetLeft, offsetTop);
offsetTop += newHeight;
}
}
break;
}
mdiContainer.InvalidateSize();
mdiContainer.MdiLayout = MdiLayout.ArrangeIcons;
}
/// <summary>
/// Dependency property event once the windows state value has changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
private static void WindowStateValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var mdiChild = (MdiChild)sender;
MdiContainer mdiContainer = mdiChild.Container;
var previousWindowState = (WindowState)e.OldValue;
var windowState = (WindowState)e.NewValue;
if (mdiChild.Container == null ||
previousWindowState == windowState)
{
return;
}
if (previousWindowState == WindowState.Maximized)
{
if (mdiContainer.ActiveMdiChild.WindowState != WindowState.Maximized)
{
for (int i = 0; i < mdiContainer.Children.Count; i++)
{
if (mdiContainer.Children[i] != mdiChild &&
mdiContainer.Children[i].WindowState == WindowState.Maximized &&
mdiContainer.Children[i].MaximizeBox)
{
mdiContainer.Children[i].WindowState = WindowState.Normal;
}
}
var sv = (ScrollViewer)((Grid)mdiContainer.Content).Children[1];
sv.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;
sv.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
}
mdiChild.Buttons.Children.Clear();
mdiChild.Buttons = null;
mdiChild.buttonsPanel.Children.Add(mdiChild.minimizeButton);
mdiChild.buttonsPanel.Children.Add(mdiChild.maximizeButton);
mdiChild.buttonsPanel.Children.Add(mdiChild.closeButton);
}
if (previousWindowState == WindowState.Minimized)
{
mdiChild.minimizedPosition = mdiChild.Position;
}
switch (windowState)
{
case WindowState.Normal:
{
mdiChild.Position = new Point(mdiChild.originalDimension.X, mdiChild.originalDimension.Y);
mdiChild.Width = mdiChild.originalDimension.Width;
mdiChild.Height = mdiChild.originalDimension.Height;
}
break;
case WindowState.Minimized:
{
if (previousWindowState == WindowState.Normal)
{
mdiChild.originalDimension = new Rect(mdiChild.Position.X, mdiChild.Position.Y, mdiChild.ActualWidth, mdiChild.ActualHeight);
}
double newLeft, newTop;
if (mdiChild.minimizedPosition.X >= 0 || mdiChild.minimizedPosition.Y >= 0)
{
newLeft = mdiChild.minimizedPosition.X;
newTop = mdiChild.minimizedPosition.Y;
}
else
{
var minimizedWindows = new List <Rect>();
for (int i = 0; i < mdiContainer.Children.Count; i++)
{
MdiChild child = mdiContainer.Children[i];
if (child != mdiChild &&
child.WindowState == WindowState.Minimized)
{
minimizedWindows.Add(new Rect(child.Position.X, mdiContainer.InnerHeight - child.Position.Y, child.Width, child.Height));
}
}
Rect newWindowPlace;
bool occupied = true;
int count = 0,
capacity = Convert.ToInt32(mdiContainer.ActualWidth) / MinimizedWidth;
do
{
int row = count / capacity + 1,
col = count % capacity;
newTop = MinimizedHeight * row;
newLeft = MinimizedWidth * col;
newWindowPlace = new Rect(newLeft, newTop, MinimizedWidth, MinimizedHeight);
occupied = false;
foreach (Rect rect in minimizedWindows)
{
Rect intersection = rect;
intersection.Intersect(newWindowPlace);
if (intersection != Rect.Empty && intersection.Width > 0 && intersection.Height > 0)
{
occupied = true;
break;
}
}
count++;
// TODO: handle negative Canvas coordinates somehow.
if (newTop < 0)
{
// ugly workaround for now.
newTop = 0;
occupied = false;
}
} while (occupied);
newTop = mdiContainer.InnerHeight - newTop;
}
mdiChild.Position = new Point(newLeft, newTop);
mdiChild.Width = MinimizedWidth;
mdiChild.Height = MinimizedHeight;
}
break;
case WindowState.Maximized:
{
if (previousWindowState == WindowState.Normal)
{
mdiChild.originalDimension = new Rect(mdiChild.Position.X, mdiChild.Position.Y, mdiChild.ActualWidth, mdiChild.ActualHeight);
}
mdiChild.NonMaximizedState = previousWindowState;
mdiChild.buttonsPanel.Children.Clear();
var sp = new StackPanel {
Orientation = Orientation.Horizontal
};
sp.Children.Add(mdiChild.minimizeButton);
sp.Children.Add(mdiChild.maximizeButton);
sp.Children.Add(mdiChild.closeButton);
mdiChild.Buttons = sp;
mdiChild.Position = new Point(0, 0);
mdiChild.Width = mdiContainer.ActualWidth;
mdiChild.Height = mdiContainer.InnerHeight - 2; // ContentBorder.BorderThickness="1" in template
var sv = (ScrollViewer)((Grid)mdiContainer.Content).Children[1];
sv.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;
sv.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;
}
break;
}
if (mdiContainer.ActiveMdiChild == mdiChild)
{
mdiContainer.Buttons = mdiChild.Buttons;
}
mdiContainer.InvalidateSize();
}
