source: trunk/sources/WinFormsUI/Docking/DockAreasEditor.cs @ 2636

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace WeifenLuo.WinFormsUI.Docking
{ 
  internal class DockAreasEditor : UITypeEditor
  {
    private class DockAreasEditorControl : System.Windows.Forms.UserControl
    {
      private CheckBox checkBoxFloat;
      private CheckBox checkBoxDockLeft;
      private CheckBox checkBoxDockRight;
      private CheckBox checkBoxDockTop;
      private CheckBox checkBoxDockBottom;
      private CheckBox checkBoxDockFill;
      private DockAreas m_oldDockAreas;

      public DockAreas DockAreas
      {
        get
        {
          DockAreas dockAreas = 0;
          if (checkBoxFloat.Checked)
            dockAreas |= DockAreas.Float;
          if (checkBoxDockLeft.Checked)
            dockAreas |= DockAreas.DockLeft;
          if (checkBoxDockRight.Checked)
            dockAreas |= DockAreas.DockRight;
          if (checkBoxDockTop.Checked)
            dockAreas |= DockAreas.DockTop;
          if (checkBoxDockBottom.Checked)
            dockAreas |= DockAreas.DockBottom;
          if (checkBoxDockFill.Checked)
            dockAreas |= DockAreas.Document;

          if (dockAreas == 0)
            return m_oldDockAreas;
          else
            return dockAreas;
        }
      }

      public DockAreasEditorControl()
      {
        checkBoxFloat = new CheckBox();
        checkBoxDockLeft = new CheckBox();
        checkBoxDockRight = new CheckBox();
        checkBoxDockTop = new CheckBox();
        checkBoxDockBottom = new CheckBox();
        checkBoxDockFill = new CheckBox();

        SuspendLayout();

        checkBoxFloat.Appearance = Appearance.Button;
        checkBoxFloat.Dock = DockStyle.Top;
        checkBoxFloat.Height = 24;
        checkBoxFloat.Text = Strings.DockAreaEditor_FloatCheckBoxText;
        checkBoxFloat.TextAlign = ContentAlignment.MiddleCenter;
        checkBoxFloat.FlatStyle = FlatStyle.System;
      
        checkBoxDockLeft.Appearance = System.Windows.Forms.Appearance.Button;
        checkBoxDockLeft.Dock = System.Windows.Forms.DockStyle.Left;
        checkBoxDockLeft.Width = 24;
        checkBoxDockLeft.FlatStyle = FlatStyle.System;

        checkBoxDockRight.Appearance = System.Windows.Forms.Appearance.Button;
        checkBoxDockRight.Dock = System.Windows.Forms.DockStyle.Right;
        checkBoxDockRight.Width = 24;
        checkBoxDockRight.FlatStyle = FlatStyle.System;

        checkBoxDockTop.Appearance = System.Windows.Forms.Appearance.Button;
        checkBoxDockTop.Dock = System.Windows.Forms.DockStyle.Top;
        checkBoxDockTop.Height = 24;
        checkBoxDockTop.FlatStyle = FlatStyle.System;

        checkBoxDockBottom.Appearance = System.Windows.Forms.Appearance.Button;
        checkBoxDockBottom.Dock = System.Windows.Forms.DockStyle.Bottom;
        checkBoxDockBottom.Height = 24;
        checkBoxDockBottom.FlatStyle = FlatStyle.System;
      
        checkBoxDockFill.Appearance = System.Windows.Forms.Appearance.Button;
        checkBoxDockFill.Dock = System.Windows.Forms.DockStyle.Fill;
        checkBoxDockFill.FlatStyle = FlatStyle.System;

        this.Controls.AddRange(new Control[] {
                             checkBoxDockFill,
                             checkBoxDockBottom,
                             checkBoxDockTop,
                             checkBoxDockRight,
                             checkBoxDockLeft,
                             checkBoxFloat});

        Size = new System.Drawing.Size(160, 144);
        BackColor = SystemColors.Control;
        ResumeLayout();
      }

      public void SetStates(DockAreas dockAreas)
      {
        m_oldDockAreas = dockAreas;
        if ((dockAreas & DockAreas.DockLeft) != 0)
          checkBoxDockLeft.Checked = true;
        if ((dockAreas & DockAreas.DockRight) != 0)
          checkBoxDockRight.Checked = true;
        if ((dockAreas & DockAreas.DockTop) != 0)
          checkBoxDockTop.Checked = true;
        if ((dockAreas & DockAreas.DockTop) != 0)
          checkBoxDockTop.Checked = true;
        if ((dockAreas & DockAreas.DockBottom) != 0)
          checkBoxDockBottom.Checked = true;
        if ((dockAreas & DockAreas.Document) != 0)
          checkBoxDockFill.Checked = true;
        if ((dockAreas & DockAreas.Float) != 0)
          checkBoxFloat.Checked = true;
      }
    }

    private DockAreasEditor.DockAreasEditorControl m_ui = null;

    public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
    {
      return UITypeEditorEditStyle.DropDown;
    }

    public override object EditValue(ITypeDescriptorContext context, IServiceProvider sp, object value)
    {
      if (m_ui == null)
        m_ui = new DockAreasEditor.DockAreasEditorControl();

      m_ui.SetStates((DockAreas)value);

            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)sp.GetService(typeof(IWindowsFormsEditorService));
      edSvc.DropDownControl(m_ui);

      return m_ui.DockAreas;
    }
  }
}