97 lines
2.8 KiB
C#
97 lines
2.8 KiB
C#
using System;
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//using System.Drawing;
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using Gwen.Control;
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using Gwen.Input;
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namespace Gwen.ControlInternal
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{
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/// <summary>
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/// Base for controls that can be dragged by mouse.
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/// </summary>
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public class Dragger : Base
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{
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protected bool m_Held;
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protected Point m_HoldPos;
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protected Base m_Target;
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internal Base Target { get { return m_Target; } set { m_Target = value; } }
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/// <summary>
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/// Indicates if the control is being dragged.
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/// </summary>
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public bool IsHeld { get { return m_Held; } }
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/// <summary>
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/// Event invoked when the control position has been changed.
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/// </summary>
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public event GwenEventHandler Dragged;
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/// <summary>
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/// Initializes a new instance of the <see cref="Dragger"/> class.
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/// </summary>
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/// <param name="parent">Parent control.</param>
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public Dragger(Base parent) : base(parent)
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{
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MouseInputEnabled = true;
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m_Held = false;
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}
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/// <summary>
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/// Handler invoked on mouse click (left) event.
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/// </summary>
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/// <param name="x">X coordinate.</param>
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/// <param name="y">Y coordinate.</param>
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/// <param name="down">If set to <c>true</c> mouse button is down.</param>
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protected override void OnMouseClickedLeft(int x, int y, bool down)
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{
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if (null == m_Target) return;
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if (down)
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{
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m_Held = true;
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m_HoldPos = m_Target.CanvasPosToLocal(new Point(x, y));
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InputHandler.MouseFocus = this;
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}
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else
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{
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m_Held = false;
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InputHandler.MouseFocus = null;
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}
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}
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/// <summary>
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/// Handler invoked on mouse moved event.
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/// </summary>
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/// <param name="x">X coordinate.</param>
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/// <param name="y">Y coordinate.</param>
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/// <param name="dx">X change.</param>
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/// <param name="dy">Y change.</param>
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protected override void OnMouseMoved(int x, int y, int dx, int dy)
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{
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if (null == m_Target) return;
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if (!m_Held) return;
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Point p = new Point(x - m_HoldPos.X, y - m_HoldPos.Y);
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// Translate to parent
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if (m_Target.Parent != null)
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p = m_Target.Parent.CanvasPosToLocal(p);
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//m_Target->SetPosition( p.x, p.y );
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m_Target.MoveTo(p.X, p.Y);
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if (Dragged != null)
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Dragged.Invoke(this);
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}
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/// <summary>
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/// Renders the control using specified skin.
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/// </summary>
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/// <param name="skin">Skin to use.</param>
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protected override void Render(Skin.Base skin)
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{
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}
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}
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}
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