v0.1
This commit is contained in:
Regalis
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using System;
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using System.Diagnostics;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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namespace Subsurface
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{
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class GUIListBox : GUIComponent
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{
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protected GUIComponent selected;
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public delegate bool OnSelectedHandler(object obj);
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public OnSelectedHandler OnSelected;
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public delegate object CheckSelectedHandler();
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public CheckSelectedHandler CheckSelected;
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private GUIScrollBar scrollBar;
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private GUIFrame frame;
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private int totalSize;
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private int spacing;
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private bool scrollBarEnabled;
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private bool scrollBarHidden;
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private bool enabled;
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public object SelectedData
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{
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get
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{
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return (selected == null) ? null : selected.UserData;
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}
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}
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public int SelectedIndex
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{
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get
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{
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if (selected == null) return -1;
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return children.FindIndex(x => x == selected);
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}
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}
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public float BarScroll
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{
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get { return scrollBar.BarScroll; }
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set { scrollBar.BarScroll = value; }
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}
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public float BarSize
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{
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get { return scrollBar.BarSize; }
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}
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public int Spacing
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{
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get { return spacing; }
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set { spacing = value; }
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}
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public bool Enabled
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{
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get { return enabled; }
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set { enabled = value; }
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}
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public bool ScrollBarEnabled
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{
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get { return scrollBarEnabled; }
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set
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{
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if (value)
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{
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if (!scrollBarEnabled && scrollBarHidden) ShowScrollBar();
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}
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else
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{
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if (scrollBarEnabled && !scrollBarHidden) HideScrollBar();
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}
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scrollBarEnabled = value;
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}
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}
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public GUIListBox(Rectangle rect, GUIStyle style, GUIComponent parent = null)
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: this(rect, style, Alignment.TopLeft, parent)
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{
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}
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public GUIListBox(Rectangle rect, GUIStyle style, Alignment alignment, GUIComponent parent = null)
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: this(rect, null, style, parent)
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{
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}
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public GUIListBox(Rectangle rect, Color? color, GUIStyle style = null, GUIComponent parent = null)
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: this(rect, color, (Alignment.Left | Alignment.Top), style, parent)
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{
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}
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public GUIListBox(Rectangle rect, Color? color, Alignment alignment, GUIStyle style = null, GUIComponent parent = null)
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: base(style)
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{
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this.rect = rect;
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this.alignment = alignment;
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if (color!=null) this.color = (Color)color;
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if (parent != null)
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parent.AddChild(this);
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scrollBarHidden = true;
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scrollBar = new GUIScrollBar(
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new Rectangle(this.rect.X + this.rect.Width-20, this.rect.Y, 20, this.rect.Height), color, 1.0f, style);
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frame = new GUIFrame(Rectangle.Empty, style, this);
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if (style != null) style.Apply(frame, this);
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UpdateScrollBarSize();
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enabled = true;
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scrollBarEnabled = true;
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scrollBar.BarScroll = 0.0f;
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}
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public void Select(object selection)
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{
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foreach (GUIComponent child in children)
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{
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if (child.UserData != selection) continue;
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selected = child;
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if (OnSelected != null) OnSelected(selected.UserData);
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return;
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}
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}
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public override void Update(float deltaTime)
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{
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base.Update(deltaTime);
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scrollBar.Update(deltaTime);
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}
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public void Select(int childIndex)
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{
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//children[0] is the GUIFrame, ignore it
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childIndex += 1;
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if (childIndex >= children.Count || childIndex<0) return;
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selected = children[childIndex];
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if (OnSelected != null) OnSelected(selected.UserData);
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}
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public void Deselect()
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{
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selected = null;
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}
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public void UpdateScrollBarSize()
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{
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totalSize = 0;
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foreach (GUIComponent child in children)
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{
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if (child == frame) continue;
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totalSize += (scrollBar.IsHorizontal) ? child.Rect.Width : child.Rect.Height;
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totalSize += spacing;
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}
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scrollBar.BarSize = scrollBar.IsHorizontal ?
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Math.Min((float)rect.Width / (float)totalSize, 1.0f) :
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Math.Min((float)rect.Height / (float)totalSize, 1.0f);
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if (scrollBar.BarSize < 1.0f && scrollBarHidden) ShowScrollBar();
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if (scrollBar.BarSize >= 1.0f && !scrollBarHidden) HideScrollBar();
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}
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public override void AddChild(GUIComponent child)
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{
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base.AddChild(child);
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//float oldScroll = scrollBar.BarScroll;
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//float oldSize = scrollBar.BarSize;
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UpdateScrollBarSize();
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//if (oldSize == 1.0f && scrollBar.BarScroll == 0.0f) scrollBar.BarScroll = 1.0f;
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//if (scrollBar.BarSize < 1.0f && oldScroll == 1.0f)
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//{
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// scrollBar.BarScroll = 1.0f;
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//}
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}
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public override void ClearChildren()
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{
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base.ClearChildren();
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selected = null;
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}
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public override void RemoveChild(GUIComponent child)
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{
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base.RemoveChild(child);
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if (selected == child) selected = null;
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UpdateScrollBarSize();
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}
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private void ShowScrollBar()
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{
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if (scrollBarHidden) Rect = new Rectangle(rect.X, rect.Y, rect.Width - scrollBar.Rect.Width, rect.Height);
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scrollBarHidden = false;
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}
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private void HideScrollBar()
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{
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if (!scrollBarHidden) Rect = new Rectangle(rect.X, rect.Y, rect.Width + scrollBar.Rect.Width, rect.Height);
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scrollBarHidden = true;
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}
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public override void Draw(SpriteBatch spriteBatch)
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{
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base.Draw(spriteBatch);
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frame.Draw(spriteBatch);
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//GUI.DrawRectangle(spriteBatch, rect, color*alpha, true);
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int x = rect.X, y = rect.Y;
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if (!scrollBarHidden)
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{
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scrollBar.Draw(spriteBatch);
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if (scrollBar.IsHorizontal)
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{
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x -= (int)((totalSize - rect.Height) * scrollBar.BarScroll);
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}
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else
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{
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y -= (int)((totalSize - rect.Height) * scrollBar.BarScroll);
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}
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}
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for (int i = 0; i < children.Count; i++ )
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{
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GUIComponent child = children[i];
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if (child == frame) continue;
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child.Rect = new Rectangle(child.Rect.X, y, child.Rect.Width, child.Rect.Height);
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y += child.Rect.Height + spacing;
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if (child.Rect.Y + child.Rect.Height < rect.Y) continue;
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if (child.Rect.Y + child.Rect.Height > rect.Y + rect.Height) break;
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if (child.Rect.Y < rect.Y && child.Rect.Y + child.Rect.Height >= rect.Y)
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{
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y = rect.Y;
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continue;
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}
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if (selected == child)
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{
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child.State = ComponentState.Selected;
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if (CheckSelected != null)
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{
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if (CheckSelected() != selected.UserData) selected = null;
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}
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}
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else if (enabled && (MouseOn == this || (MouseOn != null && this.IsParentOf(MouseOn))) && child.Rect.Contains(PlayerInput.GetMouseState.Position))
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{
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child.State = ComponentState.Hover;
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if (PlayerInput.LeftButtonClicked())
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{
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Debug.WriteLine("clicked");
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selected = child;
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if (OnSelected != null)
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{
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if (!OnSelected(child.UserData)) selected = null;
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}
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}
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}
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else
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{
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child.State = ComponentState.None;
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}
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child.Draw(spriteBatch);
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}
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//GUI.DrawRectangle(spriteBatch, rect, Color.Black, false);
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}
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}
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}
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