#region License Information
/* HeuristicLab
* Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace HeuristicLab.MainForm.WindowsForms {
public static class ControlExtensions {
[DllImport("user32.dll")]
private static extern int SendMessage(IntPtr hWnd, Int32 wMsg, bool wParam, Int32 lParam);
private const int WM_SETREDRAW = 11;
public static void SuspendRepaint(this Control control) {
if (control.InvokeRequired)
control.Invoke(new Action(c => c.SuspendRepaint()), control);
else
SendMessage(control.Handle, WM_SETREDRAW, false, 0);
}
public static void ResumeRepaint(this Control control, bool refresh) {
if (control.InvokeRequired)
control.Invoke(new Action((c, b) => c.ResumeRepaint(b)), control, refresh);
else {
SendMessage(control.Handle, WM_SETREDRAW, true, 0);
if (refresh) control.Refresh();
}
}
public static IEnumerable GetNestedControls(this Control control, Func condition = null) {
if (control == null) yield break;
if (condition == null) condition = (c) => true;
Queue unprocessed = new Queue();
unprocessed.Enqueue(control);
while (unprocessed.Count > 0) {
Control c = unprocessed.Dequeue();
if (condition(c)) yield return c;
foreach (Control child in c.Controls)
unprocessed.Enqueue(child);
}
}
}
}