/BookReader/BookReader/Controls/GridSplitterExpander.cs

using System;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Controls.Primitives;

using System.Windows.Media;

using System.Windows.Data;



namespace BookReader.Controls

{

	public class GridSplitterExpander : ContentControl

	{

		#region --------------------DEPENDENCY PROPERTIES--------------------



		public static readonly DependencyProperty OrientationProperty =

			   DependencyProperty.Register("Orientation", typeof(Orientation), typeof(GridSplitterExpander));



		public Orientation Orientation

		{

			get { return (Orientation)GetValue(OrientationProperty); }

			set { SetValue(OrientationProperty, value); }

		}



		public static readonly DependencyProperty TitleProperty =

			   DependencyProperty.Register("Title", typeof(string), typeof(GridSplitterExpander));



		public string Title

		{

			get { return (string)GetValue(TitleProperty); }

			set { SetValue(TitleProperty, value); }

		}



		public static readonly DependencyProperty GridIndexProperty =

			   DependencyProperty.Register("GridIndex", typeof(int), typeof(GridSplitterExpander));



		public int GridIndex

		{

			get { return (int)GetValue(GridIndexProperty); }

			set { SetValue(GridIndexProperty, value); }

		}



        public bool IsExpanded

        {

            get { return _btnToggle.IsChecked == true ? true : false; }

            set { _btnToggle.IsChecked = value; }

        }



		private GridLength _CatalogSize;

        public GridLength CatalogSize

        {

            get { return _CatalogSize; }

            set

            {

                _CatalogSize = value;



                if (Orientation == Orientation.Vertical)

                    this._ParentGrid.ColumnDefinitions[GridIndex].Width = _CatalogSize;

                else

                    this._ParentGrid.RowDefinitions[GridIndex].Height = _CatalogSize;

            }

        }

		#endregion



		private Grid _ParentGrid;

		private GridSplitter _gridSplitter;

		private ToggleButton _btnToggle;

		private TextBlock _TitleBlock;



		protected override void OnInitialized(EventArgs e)

		{

			base.OnInitialized(e);



			if( System.ComponentModel.DesignerProperties.GetIsInDesignMode(this) ) return;

			//if (DesignHelper.IsInDesignMode()) return;



			_ParentGrid = ((Grid)this.Parent);



			_btnToggle = new ToggleButton();

			_btnToggle.SetValue(Panel.ZIndexProperty, 1);

			_btnToggle.Checked += new RoutedEventHandler(OnToggleChecked);

			_btnToggle.Unchecked += new RoutedEventHandler(OnToggleUnchecked);



			_gridSplitter = new GridSplitter();

			_gridSplitter.SetValue(Panel.ZIndexProperty, 0);

			_gridSplitter.HorizontalAlignment = HorizontalAlignment.Stretch;

			_gridSplitter.VerticalAlignment = VerticalAlignment.Stretch;

			_gridSplitter.DragCompleted += new DragCompletedEventHandler(OnDragCompleted);

			_gridSplitter.Background = (Brush)FindResource("ToolBarToggleButtonVerticalBackground");



			_TitleBlock = new TextBlock();

			_TitleBlock.SetValue(Panel.ZIndexProperty, 1);

			_TitleBlock.FontWeight = FontWeights.Bold;



			Binding bind = new Binding("Title");

			bind.Source = this;

			_TitleBlock.SetBinding(TextBlock.TextProperty, bind);



			if (Orientation == Orientation.Vertical)

			{

				_btnToggle.Height = _btnToggle.Width;

				_btnToggle.SetValue(Grid.ColumnProperty, 1);



				_btnToggle.HorizontalAlignment = HorizontalAlignment.Stretch;

				_btnToggle.VerticalAlignment = VerticalAlignment.Top;

				_btnToggle.Style = (Style)FindResource("GridSplitterExpanderVerticalButton");



				_gridSplitter.SetValue(Grid.ColumnProperty, 1);



				_TitleBlock.SetValue(Grid.ColumnProperty, 1);

				_TitleBlock.HorizontalAlignment = HorizontalAlignment.Center;

				_TitleBlock.VerticalAlignment = VerticalAlignment.Bottom;

				_TitleBlock.Margin = new Thickness(0, 0, 0, 5);

				_TitleBlock.LayoutTransform = new RotateTransform(-90, 0, 0);

			}

			else

			{

				_btnToggle.Width = _btnToggle.Height;

				_btnToggle.SetValue(Grid.RowProperty, 1);



				_btnToggle.HorizontalAlignment = HorizontalAlignment.Right;

				_btnToggle.VerticalAlignment = VerticalAlignment.Stretch;

				_btnToggle.Style = (Style)FindResource("GridSplitterExpanderHorizontalButton");



				_gridSplitter.SetValue(Grid.RowProperty, 1);



				_TitleBlock.SetValue(Grid.RowProperty, 1);

				_TitleBlock.HorizontalAlignment = HorizontalAlignment.Left;

				_TitleBlock.VerticalAlignment = VerticalAlignment.Center;

				_TitleBlock.Margin = new Thickness(5, 0, 0, 0);

			}

			_ParentGrid.Children.Add(_btnToggle);

			_ParentGrid.Children.Add(_gridSplitter);

			_ParentGrid.Children.Add(_TitleBlock);

		}



		private void OnToggleChecked(object sender, RoutedEventArgs e)

		{

			if (Orientation == Orientation.Vertical)

			{

                _CatalogSize = this._ParentGrid.ColumnDefinitions[GridIndex].Width;

				this._ParentGrid.ColumnDefinitions[GridIndex].Width = new GridLength(0);

			}

			else

			{

                _CatalogSize = this._ParentGrid.RowDefinitions[GridIndex].Height;

				this._ParentGrid.RowDefinitions[GridIndex].Height = new GridLength(0);

			}

		}



		private void OnToggleUnchecked(object sender, RoutedEventArgs e)

		{

			if (Orientation == Orientation.Vertical)

                this._ParentGrid.ColumnDefinitions[GridIndex].Width = _CatalogSize;

			else

                this._ParentGrid.RowDefinitions[GridIndex].Height = _CatalogSize;

		}



		private void OnDragCompleted(object sender, System.Windows.Controls.Primitives.DragCompletedEventArgs e)

		{

			if (Orientation == Orientation.Vertical)

                _CatalogSize = this._ParentGrid.ColumnDefinitions[GridIndex].Width;

			else

                _CatalogSize = this._ParentGrid.RowDefinitions[GridIndex].Height;



			this._btnToggle.IsChecked = false;

		}

	}

}