57 lines
1.6 KiB
C#
57 lines
1.6 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace CsvView
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{
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public class DoubleBufferPanel : Panel
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{
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public DoubleBufferPanel()
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{
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DoubleBuffered = true;
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SetStyle(ControlStyles.UserPaint |
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ControlStyles.AllPaintingInWmPaint |
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ControlStyles.ResizeRedraw |
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ControlStyles.ContainerControl |
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.SupportsTransparentBackColor
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, true);
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}
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[DllImport("user32.dll", CharSet = CharSet.Auto)]
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public static extern int SendMessage(IntPtr hWnd, Int32 wMsg, bool wParam, Int32 lParam);
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private const int WM_SetRedraw = 0XB;
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public void SuspendDrawing()
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{
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SuspendLayout();
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SendMessage(Handle, WM_SetRedraw, false, 0);
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}
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public void ResumeDrawing()
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{
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ResumeLayout(true);
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SendMessage(Handle, WM_SetRedraw, true, 0);
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Refresh();
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}
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[DefaultValue(false)]
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[Localizable(false)]
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[Category("CatLayout")]
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[Description("DisableAutoScrollDescr")]
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public bool DisableAutoScroll { get; set; }
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protected override Point ScrollToControl(Control activeControl)
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{
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if (DisableAutoScroll)
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{
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return DisplayRectangle.Location;
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}
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return base.ScrollToControl(activeControl);
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}
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}
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}
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