RubberLayout.cs :  » Game » RealmForge » LayoutManager » C# / CSharp Open Source

using System;
using HashtableSystem.Collections.Hashtable;
using RectangleSystem.Drawing.Rectangle;
using ControlSystem.Windows.Forms.Control;

namespace LayoutManager{
  public class RubberLayout : ILayoutManager {
    Hashtable boundTable;
    Control con;

    #region private class RelBounds
    /// <summary>
    ///  This class contains the relative Bound
    ///  for a control.
    /// </summary>
    private class RelBounds {
      private double x, y, width, height;

      public RelBounds(double x, double y, double width, double height) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
      }

      public RelBounds(Rectangle controlBound, Rectangle panelBound) {
        x = (double)controlBound.X / (double)panelBound.Width;
        y = (double)controlBound.Y / (double)panelBound.Height;
        width = (double)controlBound.Width / (double)panelBound.Width;
        height = (double)controlBound.Height / (double)panelBound.Height;
      }

      public Rectangle GetAbsBounds(Rectangle panelBounds) {
        return new Rectangle((int)(x * panelBounds.Width), (int)(y * panelBounds.Height),
          (int)(width * panelBounds.Width), (int)(height * panelBounds.Height));
      }

      public override string ToString() {
        return string.Format("x = {0}, y = {1}, width = {2}, height = {3}", x, y, width, height);
      }

    }
    #endregion

    public Control Control {
      get {
        return con;
      }
      set {
        if (value != null && value != con) {
          con = value;
          ReInit();
        }
      }
    }

    public RubberLayout() {
      boundTable = new Hashtable();
      con = null;
    }

    /// <summary>
    /// Call this method to take over the actual layout.
    /// </summary>
    public void ReInit() {
      boundTable = new Hashtable();
      foreach (Control c in Control.Controls) {
        boundTable.Add(c, new RelBounds(c.Bounds, Control.Bounds));
      }
    }

    public void DoLayout() {
      RelBounds rb;

      if (Control != null) {
        foreach (Control c in Control.Controls) {
          rb = (RelBounds)boundTable[c];
          if (rb != null) {
            c.Bounds = rb.GetAbsBounds(Control.Bounds);
          }
        }
      }
    }

    public void ControlAdded(Control c) {
      if (c != null) {
        if (boundTable.Contains(c)) {
          boundTable[c] = new RelBounds(c.Bounds, Control.Bounds);
        } else {
          boundTable.Add(c, new RelBounds(c.Bounds, Control.Bounds));
        }
      }
    }

    public void ControlRemoved(Control c) {
      if (c != null) {
        boundTable.Remove(c);
      }
    }
  }
}