openhardwaremonitor/GUI/SplitContainerAdv.cs

/*
 
  This Source Code Form is subject to the terms of the Mozilla Public
  License, v. 2.0. If a copy of the MPL was not distributed with this
  file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
  Copyright (C) 2009-2010 Michael Möller <mmoeller@openhardwaremonitor.org>
	
*/

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace OpenHardwareMonitor.GUI {
  public class SplitContainerAdv : SplitContainer {

    private int delta = 0;
    private Border3DStyle border3DStyle = Border3DStyle.Raised;
    private Color color = SystemColors.Control;

    public SplitContainerAdv()
      : base() {
      SetStyle(ControlStyles.ResizeRedraw, true);
      SetStyle(ControlStyles.AllPaintingInWmPaint, true);
      SetStyle(ControlStyles.UserPaint, true);
      SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
      SetStyle(ControlStyles.ContainerControl, true);
      UpdateStyles();
    }

    protected override void OnPaint(PaintEventArgs e) {
      base.OnPaint(e);

      Graphics g = e.Graphics;
      Rectangle r = SplitterRectangle;
      using (SolidBrush brush = new SolidBrush(color))
        g.FillRectangle(brush, r);
      ControlPaint.DrawBorder3D(g, r, border3DStyle);
    }

    protected override void OnKeyDown(KeyEventArgs e) {
      if (!base.IsSplitterFixed) {
        if (e.KeyData == Keys.Right || e.KeyData == Keys.Down) {
          SplitterDistance += SplitterIncrement;
        } else if (e.KeyData == Keys.Left || e.KeyData == Keys.Up) {
          SplitterDistance -= SplitterIncrement;
        }
        Invalidate();
      }
    }

    protected override void OnMouseDown(MouseEventArgs e) {
      if (Orientation == Orientation.Vertical) {
        delta = this.SplitterDistance - e.X;
        Cursor.Current = Cursors.VSplit;
      } else {
        delta = this.SplitterDistance - e.Y;
        Cursor.Current = Cursors.HSplit;
      }
      base.IsSplitterFixed = true;
    }

    protected override void OnMouseMove(MouseEventArgs e) {
      if (base.IsSplitterFixed) {
        if (e.Button == MouseButtons.Left) {
          if (Orientation == Orientation.Vertical) {
            if (e.X > 0 && e.X < Width) {
              SplitterDistance = e.X + delta < 0 ? 0 : e.X + delta;
            }
          } else {
            if (e.Y > 0 && e.Y < Height) {
              SplitterDistance = e.Y + delta < 0 ? 0 : e.Y + delta;
            }
          }
        } else {
          base.IsSplitterFixed = false;
        }
        Invalidate();
      } else {
        if (SplitterRectangle.Contains(e.Location)) {
          Cursor = Orientation == Orientation.Vertical ?
            Cursors.VSplit : Cursors.HSplit;
        }
      }
    }

    protected override void OnMouseLeave(EventArgs e) {
      base.OnMouseLeave(e);
      Cursor = Cursors.Default;
    }

    protected override void OnMouseUp(MouseEventArgs e) {
      delta = 0;
      base.IsSplitterFixed = false;
      Cursor.Current = Cursors.Default;
    }

    public Border3DStyle Border3DStyle {
      get { return border3DStyle; }
      set {
        border3DStyle = value;
        Invalidate(false);
      }
    }

    public Color Color {
      get { return color; }
      set {
        color = value;
        Invalidate(false);
      }
    }

    public new bool IsSplitterFixed {
      get {
        return false;
      }
    }

  }
}