486 lines
18 KiB
C#
486 lines
18 KiB
C#
////////////////////////////////////////////////////////////////
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// //
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// Neoforce Controls //
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// //
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////////////////////////////////////////////////////////////////
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// //
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// File: ListBox.cs //
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// //
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// Version: 0.7 //
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// //
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// Date: 11/09/2010 //
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// //
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// Author: Tom Shane //
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// //
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////////////////////////////////////////////////////////////////
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// //
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// Copyright (c) by Tom Shane //
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// //
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////////////////////////////////////////////////////////////////
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#region //// Using /////////////
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////////////////////////////////////////////////////////////////////////////
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using System;
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using System.Collections.Generic;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Input;
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////////////////////////////////////////////////////////////////////////////
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#endregion
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namespace TomShane.Neoforce.Controls
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{
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#region //// Classes ///////////
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////////////////////////////////////////////////////////////////////////////
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/// <include file='Documents/ListBox.xml' path='ListBox/Class[@name="ListBox"]/*' />
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public class ListBox : Control
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{
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#region //// Fields ////////////
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////////////////////////////////////////////////////////////////////////////
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private List<object> items = new List<object>();
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private ScrollBar sbVert = null;
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private ClipBox pane = null;
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private int itemIndex = -1;
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private bool hotTrack = false;
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private int itemsCount = 0;
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private bool hideSelection = true;
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////////////////////////////////////////////////////////////////////////////
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#endregion
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#region //// Properties ////////
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////////////////////////////////////////////////////////////////////////////
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public virtual List<object> Items
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{
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get { return items; }
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internal set { items = value; }
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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public virtual bool HotTrack
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{
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get { return hotTrack; }
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set
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{
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if (hotTrack != value)
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{
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hotTrack = value;
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if (!Suspended) OnHotTrackChanged(new EventArgs());
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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public virtual int ItemIndex
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{
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get { return itemIndex; }
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set
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{
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//if (itemIndex != value)
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{
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if (value >= 0 && value < items.Count)
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{
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itemIndex = value;
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}
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else
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{
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itemIndex = -1;
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}
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ScrollTo(itemIndex);
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if (!Suspended) OnItemIndexChanged(new EventArgs());
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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public virtual bool HideSelection
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{
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get { return hideSelection; }
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set
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{
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if (hideSelection != value)
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{
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hideSelection = value;
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Invalidate();
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if (!Suspended) OnHideSelectionChanged(new EventArgs());
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////
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#endregion
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#region //// Events ////////////
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////////////////////////////////////////////////////////////////////////////
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public event EventHandler HotTrackChanged;
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public event EventHandler ItemIndexChanged;
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public event EventHandler HideSelectionChanged;
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////////////////////////////////////////////////////////////////////////////
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#endregion
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#region //// Construstors //////
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////////////////////////////////////////////////////////////////////////////
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public ListBox(Manager manager)
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: base(manager)
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{
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Width = 64;
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Height = 64;
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MinimumHeight = 16;
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sbVert = new ScrollBar(Manager, Orientation.Vertical);
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sbVert.Init();
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sbVert.Parent = this;
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sbVert.Left = Left + Width - sbVert.Width - Skin.Layers["Control"].ContentMargins.Right;
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sbVert.Top = Top + Skin.Layers["Control"].ContentMargins.Top;
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sbVert.Height = Height - Skin.Layers["Control"].ContentMargins.Vertical;
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sbVert.Anchor = Anchors.Top | Anchors.Right | Anchors.Bottom;
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sbVert.PageSize = 25;
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sbVert.Range = 1;
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sbVert.PageSize = 1;
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sbVert.StepSize = 10;
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pane = new ClipBox(manager);
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pane.Init();
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pane.Parent = this;
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pane.Top = Skin.Layers["Control"].ContentMargins.Top;
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pane.Left = Skin.Layers["Control"].ContentMargins.Left;
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pane.Width = Width - sbVert.Width - Skin.Layers["Control"].ContentMargins.Horizontal - 1;
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pane.Height = Height - Skin.Layers["Control"].ContentMargins.Vertical;
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pane.Anchor = Anchors.All;
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pane.Passive = true;
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pane.CanFocus = false;
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pane.Draw += new DrawEventHandler(DrawPane);
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CanFocus = true;
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Passive = false;
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}
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////////////////////////////////////////////////////////////////////////////
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#endregion
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#region //// Methods ///////////
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////////////////////////////////////////////////////////////////////////////
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public override void Init()
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{
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base.Init();
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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public virtual void AutoHeight(int maxItems)
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{
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if (items != null && items.Count < maxItems) maxItems = items.Count;
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if (maxItems < 3)
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{
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//maxItems = 3;
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sbVert.Visible = false;
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pane.Width = Width - Skin.Layers["Control"].ContentMargins.Horizontal - 1;
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}
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else
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{
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pane.Width = Width - sbVert.Width - Skin.Layers["Control"].ContentMargins.Horizontal - 1;
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sbVert.Visible = true;
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}
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SkinText font = Skin.Layers["Control"].Text;
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if (items != null && items.Count > 0)
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{
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int h = (int)font.Font.Resource.MeasureString(items[0].ToString()).Y;
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Height = (h * maxItems) + (Skin.Layers["Control"].ContentMargins.Vertical);// - Skin.OriginMargins.Vertical);
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}
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else
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{
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Height = 32;
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}
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}
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////////////////////////////////////////////////////////////////////////////
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public override int MinimumHeight
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{
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get { return base.MinimumHeight; }
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set
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{
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base.MinimumHeight = value;
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if (this.sbVert != null) this.sbVert.MinimumHeight = value;
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}
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}
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////////////////////////////////////////////////////////////////////////////
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protected override void DrawControl(Renderer renderer, Rectangle rect, GameTime gameTime)
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{
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sbVert.Invalidate();
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pane.Invalidate();
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//DrawPane(this, new DrawEventArgs(renderer, rect, gameTime));
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base.DrawControl(renderer, rect, gameTime);
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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private void DrawPane(object sender, DrawEventArgs e)
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{
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if (items != null && items.Count > 0)
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{
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SkinText font = Skin.Layers["Control"].Text;
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SkinLayer sel = Skin.Layers["ListBox.Selection"];
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int h = (int)font.Font.Resource.MeasureString(items[0].ToString()).Y;
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int v = (sbVert.Value / 10);
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int p = (sbVert.PageSize / 10);
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int d = (int)(((sbVert.Value % 10) / 10f) * h);
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int c = items.Count;
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int s = itemIndex;
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for (int i = v; i <= v + p + 1; i++)
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{
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if (i < c)
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{
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e.Renderer.DrawString(this, Skin.Layers["Control"], items[i].ToString(), new Rectangle(e.Rectangle.Left, e.Rectangle.Top - d + ((i - v) * h), e.Rectangle.Width, h), false);
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}
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}
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if (s >= 0 && s < c && (Focused || !hideSelection))
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{
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int pos = -d + ((s - v) * h);
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if (pos > -h && pos < (p + 1) * h)
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{
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e.Renderer.DrawLayer(this, sel, new Rectangle(e.Rectangle.Left, e.Rectangle.Top + pos, e.Rectangle.Width, h));
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e.Renderer.DrawString(this, sel, items[s].ToString(), new Rectangle(e.Rectangle.Left, e.Rectangle.Top + pos, e.Rectangle.Width, h), false);
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}
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected override void OnMouseDown(MouseEventArgs e)
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{
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base.OnMouseDown(e);
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if (e.Button == MouseButton.Left || e.Button == MouseButton.Right)
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{
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TrackItem(e.Position.X, e.Position.Y);
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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private void TrackItem(int x, int y)
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{
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if (items != null && items.Count > 0 && (pane.ControlRect.Contains(new Point(x, y))))
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{
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SkinText font = Skin.Layers["Control"].Text;
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int h = (int)font.Font.Resource.MeasureString(items[0].ToString()).Y;
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int d = (int)(((sbVert.Value % 10) / 10f) * h);
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int i = (int)Math.Floor((sbVert.Value / 10f) + ((float)y / h));
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if (i >= 0 && i < Items.Count && i >= (int)Math.Floor((float)sbVert.Value / 10f) && i < (int)Math.Ceiling((float)(sbVert.Value + sbVert.PageSize) / 10f)) ItemIndex = i;
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Focused = true;
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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if (hotTrack)
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{
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TrackItem(e.Position.X, e.Position.Y);
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected override void OnKeyPress(KeyEventArgs e)
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{
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if (e.Key == Keys.Down)
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{
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e.Handled = true;
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itemIndex += sbVert.StepSize / 10;
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}
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else if (e.Key == Keys.Up)
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{
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e.Handled = true;
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itemIndex -= sbVert.StepSize / 10;
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}
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else if (e.Key == Keys.PageDown)
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{
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e.Handled = true;
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itemIndex += sbVert.PageSize / 10;
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}
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else if (e.Key == Keys.PageUp)
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{
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e.Handled = true;
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itemIndex -= sbVert.PageSize / 10;
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}
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else if (e.Key == Keys.Home)
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{
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e.Handled = true;
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itemIndex = 0;
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}
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else if (e.Key == Keys.End)
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{
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e.Handled = true;
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itemIndex = items.Count - 1;
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}
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if (itemIndex < 0) itemIndex = 0;
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else if (itemIndex >= Items.Count) itemIndex = Items.Count - 1;
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ItemIndex = itemIndex;
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base.OnKeyPress(e);
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}
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////////////////////////////////////////////////////////////////////////////
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/// <summary>
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/// Handles mouse scroll events for the list box.
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/// </summary>
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/// <param name="e"></param>
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protected override void OnMouseScroll(MouseEventArgs e)
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{
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Focused = true;
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if (e.ScrollDirection == MouseScrollDirection.Down)
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{
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e.Handled = true;
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itemIndex += sbVert.StepSize / 10;
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}
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else if (e.ScrollDirection == MouseScrollDirection.Up)
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{
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e.Handled = true;
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itemIndex -= sbVert.StepSize / 10;
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}
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// Wrap index in collection range.
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if (itemIndex < 0) itemIndex = 0;
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else if (itemIndex >= Items.Count) itemIndex = Items.Count - 1;
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ItemIndex = itemIndex;
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base.OnMouseScroll(e);
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}
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////////////////////////////////////////////////////////////////////////////
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protected override void OnGamePadPress(GamePadEventArgs e)
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{
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if (e.Button == GamePadActions.Down)
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{
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e.Handled = true;
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itemIndex += sbVert.StepSize / 10;
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}
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else if (e.Button == GamePadActions.Up)
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{
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e.Handled = true;
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itemIndex -= sbVert.StepSize / 10;
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}
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if (itemIndex < 0) itemIndex = 0;
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else if (itemIndex >= Items.Count) itemIndex = Items.Count - 1;
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ItemIndex = itemIndex;
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base.OnGamePadPress(e);
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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private void ItemsChanged()
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{
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if (items != null && items.Count > 0)
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{
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SkinText font = Skin.Layers["Control"].Text;
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int h = (int)font.Font.Resource.MeasureString(items[0].ToString()).Y;
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int sizev = Height - Skin.Layers["Control"].ContentMargins.Vertical;
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sbVert.Range = items.Count * 10;
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sbVert.PageSize = (int)Math.Floor((float)sizev * 10 / h);
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Invalidate();
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}
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else if (items == null || items.Count <= 0)
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{
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sbVert.Range = 1;
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sbVert.PageSize = 1;
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Invalidate();
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected override void OnResize(ResizeEventArgs e)
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{
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base.OnResize(e);
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ItemsChanged();
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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public virtual void ScrollTo(int index)
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{
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ItemsChanged();
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if ((index * 10) < sbVert.Value)
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{
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sbVert.Value = index * 10;
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}
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else if (index >= (int)Math.Floor(((float)sbVert.Value + sbVert.PageSize) / 10f))
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{
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sbVert.Value = ((index + 1) * 10) - sbVert.PageSize;
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected internal override void Update(GameTime gameTime)
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{
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base.Update(gameTime);
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if (Visible && items != null && items.Count != itemsCount)
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{
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itemsCount = items.Count;
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ItemsChanged();
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}
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected virtual void OnItemIndexChanged(EventArgs e)
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{
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if (ItemIndexChanged != null) ItemIndexChanged.Invoke(this, e);
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected virtual void OnHotTrackChanged(EventArgs e)
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{
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if (HotTrackChanged != null) HotTrackChanged.Invoke(this, e);
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}
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////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////
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protected virtual void OnHideSelectionChanged(EventArgs e)
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{
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if (HideSelectionChanged != null) HideSelectionChanged.Invoke(this, e);
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}
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////////////////////////////////////////////////////////////////////////////
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#endregion
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}
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////////////////////////////////////////////////////////////////////////////
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#endregion
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}
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