Source/Controls/ScrollBarReplacement.cs

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#if FRAMEWORK20
using System;
using System.Text;
using DevComponents.DotNetBar.ScrollBar;
using System.Drawing;
using System.Windows.Forms;
using DevComponents.DotNetBar.Rendering;

namespace DevComponents.DotNetBar.Controls
{
    internal class ScrollBarReplacement:IDisposable
    {
        #region Private Variables
        private ScrollBarCore m_ScrollBarCore = null;
        private System.Windows.Forms.ScrollBar m_ParentScrollBar = null;
        private IScrollBarExtender m_ParentScrollBarWndProc = null;
        private bool m_IsVScrollBar = false;
        #endregion

        #region Constructor
        public ScrollBarReplacement(System.Windows.Forms.ScrollBar sb)
        {
            m_ParentScrollBar = sb;
            m_ParentScrollBarWndProc = (IScrollBarExtender)m_ParentScrollBar;
            m_IsVScrollBar = m_ParentScrollBar is VScrollBar;

            m_ScrollBarCore = new ScrollBarCore(m_ParentScrollBar, false);
            m_ScrollBarCore.ValueChanged += new EventHandler(ScrollBarCore_ValueChanged);
            if (m_ParentScrollBar is HScrollBar)
                m_ScrollBarCore.Orientation = eOrientation.Horizontal;
            else
                m_ScrollBarCore.Orientation = eOrientation.Vertical;
            m_ScrollBarCore.Minimum = m_ParentScrollBar.Minimum;
            m_ScrollBarCore.Maximum = m_ParentScrollBar.Maximum;
            m_ScrollBarCore.Value = m_ParentScrollBar.Value;
            m_ScrollBarCore.Enabled = m_ParentScrollBar.Enabled;
            m_ParentScrollBar.EnabledChanged += new EventHandler(ParentScrollBar_EnabledChanged);
        }
        #endregion

        #region Internal Implementation
        private void ParentScrollBar_EnabledChanged(object sender, EventArgs e)
        {
            m_ScrollBarCore.Enabled = m_ParentScrollBar.Enabled;
        }

        internal void OnHandleCreated()
        {
            UpdateScrollValues();
        }

        internal void UpdateScrollValues()
        {
            Rectangle r = new Rectangle(0, 0, m_ParentScrollBar.Width, m_ParentScrollBar.Height);

            if (m_ScrollBarCore.Minimum != m_ParentScrollBar.Minimum)
                m_ScrollBarCore.Minimum = m_ParentScrollBar.Minimum;
            if (m_ScrollBarCore.Maximum != m_ParentScrollBar.Maximum)
                m_ScrollBarCore.Maximum = m_ParentScrollBar.Maximum;
            if (m_ScrollBarCore.SmallChange != m_ParentScrollBar.SmallChange)
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