namespace Crow
{
[DefaultTemplate("#Crow.Templates.ComboBox.goml")]
- [DefaultOverlayTemplate("#Crow.Templates.ComboBoxOverlay.goml")]
- public class ComboBox : TemplatedContainer
+ public class ComboBox : ListBox
{
#region CTOR
public ComboBox() : base(){ }
#endregion
-
- bool _isPopped;
- string caption;
- GraphicObject _overlay;
- Group _list;
- IList data;
- int _selectedIndex;
- object _selectedItem;
- string _itemTemplate;
- string _overlayTemplate;
-
- public event EventHandler Pop;
- public event EventHandler Unpop;
- public event EventHandler<SelectionChangeEventArgs> SelectedItemChanged;
-
- #region implemented abstract members of TemplatedControl
- protected override void loadTemplate (GraphicObject template)
- {
- base.loadTemplate (template);
- loadOverlayTemplate (null);
- }
- public override GraphicObject Content {
- get {
- throw new NotImplementedException ();
- }
- set {
- throw new NotImplementedException ();
- }
- }
- #endregion
-
- protected virtual void loadOverlayTemplate(GraphicObject overlayTemplate)
- {
- if (overlayTemplate == null) {
- DefaultOverlayTemplate dt = (DefaultOverlayTemplate)this.GetType ().GetCustomAttributes (typeof(DefaultOverlayTemplate), true).FirstOrDefault ();
- Overlay = Interface.Load (dt.Path);
- Overlay.ResolveBindings ();
- } else
- Overlay = overlayTemplate;
- _list = Overlay.FindByName ("List") as Group;
- }
-
- [XmlAttributeAttribute][DefaultValue("#Crow.Templates.ItemTemplate.goml")]
- public string ItemTemplate {
- get { return _itemTemplate; }
- set {
- //TODO:reload list with new template?
- _itemTemplate = value;
- }
- }
- [XmlAttributeAttribute][DefaultValue("#Crow.Templates.ComboBoxOverlay.goml")]
- public string OverlayTemplate {
- get { return _overlayTemplate; }
- set {
- //TODO:reload list with new template?
- _overlayTemplate = value;
-
- Overlay = Interface.Load (_overlayTemplate);
- Overlay.ResolveBindings ();
- _list = Overlay.FindByName ("List") as Group;
- }
- }
- [XmlAttributeAttribute][DefaultValue(-1)]
- public int SelectedIndex{
- get { return _selectedIndex; }
- set {
- //store value event if data is null, because in xml parsing selindex is always
- //before data, so it's impossible without that trick to set a default index in goml
- _selectedIndex = value;
-
- if (data == null)
- return;
-
- if (_selectedIndex > data.Count - 1 || _selectedIndex < 0)
- throw new Exception ("Combobox SelectedIndex out of range");
-
-
- _selectedItem = data [_selectedIndex];
- NotifyValueChanged ("SelectedIndex", SelectedIndex);
- SelectedItemChanged.Raise (this, new SelectionChangeEventArgs(_selectedItem));
-
- if (SelectedItem == null)
- Caption = "";
- else
- Caption = _selectedItem.ToString ();
- }
- }
- public object SelectedItem{
- set {
- if (_selectedItem == value)
- return;
-
- _selectedItem = value;
- _selectedIndex = data.IndexOf (_selectedItem);
- NotifyValueChanged ("SelectedIndex", _selectedIndex);
- SelectedItemChanged.Raise (this, new SelectionChangeEventArgs(_selectedItem));
-
- if (SelectedItem == null)
- Caption = "";
- else
- Caption = _selectedItem.ToString ();
- }
-
- get { return _selectedItem; }
- }
- [XmlAttributeAttribute][DefaultValue(null)]
- public IList Data {
- get {
- return data;
- }
- set {
- data = value;
- if (_list == null)
- return;
-
- foreach (GraphicObject c in _list.Children) {
- c.ClearBinding ();
- }
- _list.Children.Clear ();
- _list.registerForGraphicUpdate ();
- if (data == null)
- return;
- if (SelectedIndex < 0)
- return;
-
- //force raise of changes
- SelectedIndex = SelectedIndex;
-
- pendingChildrenAddition = new Queue<GraphicObject> ();
- threadedLoadingFinished = false;
-
- Thread t = new Thread (loadingThread);
- t.Start ();
- t.Join ();
-
- }
- }
-
- internal void CheckPendingChildrenAddition()
- {
- if (pendingChildrenAddition == null)
- return;
- lock (pendingChildrenAddition) {
- if (!threadedLoadingFinished && pendingChildrenAddition.Count < 50)
- return;
- while (pendingChildrenAddition.Count > 0) {
- _list.AddChild (pendingChildrenAddition.Dequeue ());
- }
- }
- }
-
- volatile Queue<GraphicObject> pendingChildrenAddition;
- volatile bool threadedLoadingFinished = false;
-
- void loadingThread()
- {
- #if DEBUG_LOAD_TIME
- Stopwatch loadingTime = new Stopwatch ();
- loadingTime.Start ();
- #endif
-
- MemoryStream ms = new MemoryStream ();
- lock (ItemTemplate) {
- using (Stream stream = Interface.GetStreamFromPath (ItemTemplate))
- stream.CopyTo (ms);
- }
-
- Type t = Interface.GetTopContainerOfGOMLStream (ms);
-
- foreach (var item in data) {
- ms.Seek(0,SeekOrigin.Begin);
- GraphicObject g = Interface.Load (ms, t);
- g.DataSource = item;
- g.MouseClick += itemClick;
-
- lock (pendingChildrenAddition) {
- pendingChildrenAddition.Enqueue (g);
- }
- }
-
- ms.Dispose ();
-
- threadedLoadingFinished = true;
-
- #if DEBUG_LOAD_TIME
- loadingTime.Stop ();
- Debug.WriteLine("Listbox {2} Loading: {0} ticks \t, {1} ms",
- loadingTime.ElapsedTicks,
- loadingTime.ElapsedMilliseconds, this.ToString());
- #endif
- }
- public GraphicObject Overlay {
- get { return _overlay; }
- set {
- if (_overlay != null) {
- _overlay.LayoutChanged -= _overlay_LayoutChanged;
- _overlay.MouseLeave -= _overlay_MouseLeave;
- _overlay.LogicalParent = null;
- }
-
- _overlay = value;
-
- if (_overlay == null)
- return;
-
- _overlay.LogicalParent = this;
- _overlay.Focusable = true;
- _overlay.LayoutChanged += _overlay_LayoutChanged;
- _overlay.MouseLeave += _overlay_MouseLeave;
- }
- }
- [XmlAttributeAttribute()][DefaultValue("Combobox")]
- public string Caption {
- get { return caption; }
- set {
- if (caption == value)
- return;
- caption = value;
- NotifyValueChanged ("Caption", caption);
- }
- }
- [XmlAttributeAttribute()][DefaultValue(false)]
- public bool IsPopped
- {
- get { return _isPopped; }
- set
- {
- _isPopped = value;
-
- if (_isPopped) {
- onPop (this, null);
- NotifyValueChanged ("SvgSub", "expanded");
- return;
- }
-
- onUnpop (this, null);
- NotifyValueChanged ("SvgSub", "collapsed");
- }
- }
-
- void itemClick(object sender, OpenTK.Input.MouseButtonEventArgs e){
- object datasource = (sender as GraphicObject).DataSource;
- SelectedItem = datasource;
- IsPopped = false;
- //Debug.WriteLine ((sender as GraphicObject).DataSource);
- }
- void _overlay_MouseLeave (object sender, MouseMoveEventArgs e)
- {
- IsPopped = false;
- }
- void _overlay_LayoutChanged (object sender, LayoutingEventArgs e)
- {
- ILayoutable tc = Overlay.Parent as ILayoutable;
- if (tc == null)
- return;
- Rectangle r = this.ScreenCoordinates (this.Slot);
- if (e.LayoutType == LayoutingType.Width) {
- if (Overlay.Slot.Width < tc.ClientRectangle.Width) {
- if (r.Left + Overlay.Slot.Width > tc.ClientRectangle.Right)
- Overlay.Left = tc.ClientRectangle.Right - Overlay.Slot.Width;
- else
- Overlay.Left = r.Left;
- }else
- Overlay.Left = 0;
- }else if (e.LayoutType == LayoutingType.Height) {
- if (Overlay.Slot.Height < tc.ClientRectangle.Height) {
- if (r.Bottom + Overlay.Slot.Height > tc.ClientRectangle.Bottom)
- Overlay.Top = r.Top - Overlay.Slot.Height;
- else
- Overlay.Top = r.Bottom;
- }else
- Overlay.Top = 0;
- }
- }
-
- [XmlAttributeAttribute()][DefaultValue(true)]//overiden to get default to true
- public override bool Focusable
- {
- get { return base.Focusable; }
- set { base.Focusable = value; }
- }
-
-
- public virtual void onPop(object sender, EventArgs e)
- {
- IGOLibHost tc = HostContainer;
- if (tc == null)
- return;
- if (Overlay != null) {
- Overlay.Visible = true;
- if (Overlay.Parent == null)
- tc.AddWidget (Overlay);
- (tc as OpenTKGameWindow).PutOnTop (Overlay);
- }
- Pop.Raise (this, e);
- }
- public virtual void onUnpop(object sender, EventArgs e)
- {
- IGOLibHost tc = HostContainer;
- if (tc == null)
- return;
- Overlay.Visible = false;
- Unpop.Raise (this, e);
- }
-
- public override void onMouseClick (object sender, MouseButtonEventArgs e)
- {
- IsPopped = !IsPopped;
- base.onMouseClick (sender, e);
- }
-
- public override void ClearBinding ()
- {
- //ensure popped window is cleared
- if (Overlay != null) {
- if (Overlay.Parent != null) {
- IGOLibHost tc = Overlay.Parent as IGOLibHost;
- if (tc != null)
- tc.DeleteWidget (Overlay);
- }
- }
- base.ClearBinding ();
-
- }
- public override void ResolveBindings ()
- {
- base.ResolveBindings ();
- if (Overlay != null)
- Overlay.ResolveBindings ();
- }
}
}
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