[성현모] CPXV2 Init
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Drawing;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using System.Runtime.InteropServices;
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namespace SystemX.Net.Platform.Common.ExtensionMethods
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{
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/// <summary>
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/// http://lostechies.com/derickbailey/2011/01/24/asynchronous-control-updates-in-c-net-winforms/
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/// </summary>
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public static class EmControl
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{
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public static void Do<TControl>(this TControl control, Action<TControl> action)
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where TControl : Control
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{
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try
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{
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if (control.InvokeRequired)
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{
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try
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{
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control.Invoke(action, control);
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}
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catch (Exception ex)
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{
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if (ex is ObjectDisposedException)
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Trace.WriteLine(ex);
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else
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throw;
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}
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}
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else if (control.IsHandleCreated)
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action(control);
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else
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{
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Console.WriteLine("Error : Before windows handle created.. 창 핸들을 만들기 전까지는....");
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Trace.WriteLine("Error : Before windows handle created.. 창 핸들을 만들기 전까지는....");
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}
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}
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catch (Exception ex)
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{
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Trace.WriteLine($"Exception on Control.Do(): {ex}");
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}
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}
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/// <summary>
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/// Control.Invoke is synchronous
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/// </summary>
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/// <param name="control"></param>
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/// <param name="action"></param>
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public static void Do(this Control control, Action action)
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{
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try
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{
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if (control.InvokeRequired)
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{
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try
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{
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control.Invoke(action);
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}
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catch (Exception ex)
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{
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if (ex is ObjectDisposedException)
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Trace.WriteLine(ex);
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else
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throw;
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}
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}
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else if (control.IsHandleCreated)
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action();
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else
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{
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Console.WriteLine("Error : Before windows handle created (2).. 창 핸들을 만들기 전까지는....");
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Trace.WriteLine("Error : Before windows handle created (2).. 창 핸들을 만들기 전까지는....");
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}
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}
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catch (Exception ex)
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{
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Trace.WriteLine($"Exception on Control.Do(): {ex}");
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}
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}
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public static void Do(this SynchronizationContext context, Action action)
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{
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context.Send(ignore => { action(); }, null);
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}
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public static void DoAsync(this SynchronizationContext context, Action action)
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{
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context.Post(ignore => { action(); }, null);
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}
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public static SynchronizationContext GetSynchronizationContext(this Control control)
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{
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SynchronizationContext context = null;
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control.Do(() =>
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{
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context = SynchronizationContext.Current;
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});
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return context;
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}
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public static TaskScheduler GetTaskScheduler(this Control control)
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{
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TaskScheduler scheduler = null;
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control.Do(() =>
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{
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scheduler = TaskScheduler.FromCurrentSynchronizationContext();
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});
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return scheduler;
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}
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/// <summary>
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/// form 에 대해서, 아직 창 핸들이 만들어 지지 않은 경우, form 이 보여진 후에 해당 action 을 수행한다.
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/// </summary>
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/// <param name="form"></param>
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/// <param name="action"></param>
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public static void DoNowOrLater(this Form form, Action action)
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{
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if (form.InvokeRequired)
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form.Invoke(action);
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else if (form.IsHandleCreated)
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action();
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else
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form.Shown += (sender, args) => { action(); };
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}
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public static async Task DoAsync(this Control control, Action action)
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{
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try
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{
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if (control.InvokeRequired)
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await Task.Factory.FromAsync(control.BeginInvoke(action), result => { });
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else if (control.IsHandleCreated)
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action();
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else
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Console.WriteLine("Error : 창 핸들을 만들기 전까지는....");
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}
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catch (Exception ex)
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{
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Trace.WriteLine($"Exception on Control.Do(): {ex}");
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}
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}
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/// <summary>
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/// How to get return value when BeginInvoke/Invoke is called in C#
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/// http://stackoverflow.com/questions/2214002/how-to-get-return-value-when-begininvoke-invoke-is-called-in-c-sharp
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/// </summary>
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public static T DoGet<T>(this Control control, Func<T> func)
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{
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if (control.InvokeRequired)
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return (T)control.Invoke(func);
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return func();
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}
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public static IEnumerable<Control> CollectAncestors(this Control control, bool includeMe = false)
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{
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if (includeMe)
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yield return control;
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if (control == null || control.Parent == null)
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yield break;
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foreach (var ancestor in control.Parent.CollectAncestors(true))
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yield return ancestor;
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}
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public static IEnumerable<Control> CollectAncestorsTo(this Control control, Control stopAncestorControl,
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bool includeMe = false)
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{
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if (includeMe)
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yield return control;
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if (control == stopAncestorControl || control.Parent == null)
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yield break;
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foreach (var ancestor in control.Parent.CollectAncestorsTo(stopAncestorControl, true))
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yield return ancestor;
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}
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public static IEnumerable<Control> CollectChildren(this Control control, bool includeMe = false)
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{
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if (includeMe)
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yield return control;
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foreach (var child in control.Controls.Cast<Control>())
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{
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foreach (var descendant in child.CollectChildren(true))
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yield return descendant;
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}
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if (control is TabControl)
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{
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var tab = (TabControl) control;
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foreach (var page in tab.TabPages.Cast<TabPage>())
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{
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foreach (var descendant in page.CollectChildren(true))
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{
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yield return descendant;
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}
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}
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}
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}
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public static IEnumerable<T> CollectChildren<T>(this Control control, bool includeMe = false) where T : Control
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{
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return control.CollectChildren(includeMe).OfType<T>();
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//if (includeMe && control is T)
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// yield return control as T;
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//foreach (var child in control.Controls.Cast<Control>())
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//{
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// foreach (var descendant in child.CollectChildren<T>(true))
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// yield return descendant;
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//}
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//if (control is TabControl)
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//{
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// var tab = (TabControl)control;
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// foreach (var page in tab.TabPages.Cast<TabPage>())
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// {
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// foreach (var descendant in page.CollectChildren<T>(true))
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// {
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// yield return descendant;
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// }
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// }
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//}
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}
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/// <summary>
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/// reference 의 LT 좌표 기준으로, control 의 LT 좌표의 offset 값을 반환한다.
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/// </summary>
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/// <param name="control"></param>
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/// <param name="reference"></param>
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/// <returns></returns>
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public static Point GetRelativePoint(this Control control, Control reference)
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{
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return reference.PointToClient(control.PointToScreen(control.Location));
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}
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public static Rectangle GetRelativeRectangle(this Control control, Control reference)
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{
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return reference.RectangleToClient(control.RectangleToScreen(control.ClientRectangle));
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}
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public static void SetBackgroundImage(this Control control, Image image)
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{
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if (control.BackgroundImage != null)
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control.BackgroundImage.Dispose();
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control.BackgroundImage = image;
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}
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public static void MakeTransparent(this Control control)
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{
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try
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{
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if (control is Button)
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((Button) control).FlatStyle = FlatStyle.Flat;
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control.ForceMakeTransparent();
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control.BackColor = Color.Transparent;
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}
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catch (Exception)
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{
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}
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}
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/// <summary>
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/// http://solvedstack.com/questions/transparency-for-windows-forms-textbox
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/// <c>
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/// bool itWorked = SetStyle(xControl, ControlStyles.SupportsTransparentBackColor, true);
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/// </c>
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/// </summary>
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/// <param name="control"></param>
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/// <param name="style"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public static bool ForceSetStyle(this Control control, ControlStyles style, bool value)
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{
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Type typeTB = typeof (Control);
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System.Reflection.MethodInfo misSetStyle = typeTB.GetMethod("SetStyle",
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System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
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if (misSetStyle != null && control != null)
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{
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misSetStyle.Invoke(control, new object[] {style, value});
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return true;
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}
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return false;
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}
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public static bool ForceMakeTransparent(this Control control, bool transparent = true)
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{
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return control.ForceSetStyle(ControlStyles.SupportsTransparentBackColor, transparent);
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}
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/// <summary>
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/// http://stackoverflow.com/questions/435433/what-is-the-preferred-way-to-find-focused-control-in-winforms-app
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/// </summary>
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/// <param name="control"></param>
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/// <returns></returns>
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public static Control FindFocusedControl(this Control control)
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{
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var container = control as IContainerControl;
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while (container != null)
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{
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control = container.ActiveControl;
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container = control as IContainerControl;
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}
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return control;
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}
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// http://stackoverflow.com/questions/4747935/c-sharp-winform-check-if-control-is-physicaly-visible
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[DllImport("user32.dll")]
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static extern IntPtr WindowFromPoint(POINT Point);
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[StructLayout(LayoutKind.Sequential)]
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public struct POINT
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{
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public int X;
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public int Y;
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public POINT(int x, int y) { X = x; Y = y; }
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public static implicit operator Point(POINT p) => new Point(p.X, p.Y);
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public static implicit operator POINT(Point p) => new POINT(p.X, p.Y);
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}
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/// control 이 실제로 사용자에게 보이는지 여부를 반환
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public static bool IsControlVisibleToUser(this Control control)
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{
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return control.DoGet(() =>
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{
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if (!control.IsHandleCreated)
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return false;
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var pos = control.PointToScreen(control.Location);
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var pointsToCheck = new POINT[] {
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pos,
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new Point(pos.X + control.Width - 1, pos.Y),
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new Point(pos.X, pos.Y + control.Height - 1),
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new Point(pos.X + control.Width - 1, pos.Y + control.Height - 1),
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new Point(pos.X + control.Width/2, pos.Y + control.Height/2),
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};
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foreach (var p in pointsToCheck)
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{
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var hwnd = WindowFromPoint(p);
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var other = Control.FromChildHandle(hwnd);
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if (other == null)
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continue;
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if (control == other || control.Contains(other))
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return true;
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}
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return false;
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});
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}
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#region Detect cursor
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//// http://stackoverflow.com/questions/586479/is-there-a-quick-way-to-get-the-control-thats-under-the-mouse
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//[DllImport("user32.dll")]
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//private static extern IntPtr WindowFromPoint(Point pnt);
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//public static Control ControlUnderPoint(this Point pt)
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//{
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// IntPtr hWnd = WindowFromPoint(pt);
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// if (hWnd != IntPtr.Zero)
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// return Control.FromHandle(hWnd);
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// return null;
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//}
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//public static Control ControlUnderMouseCursor()
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//{
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// return Control.MousePosition.ControlUnderPoint();
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//}
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/// <summary> Checks whether mouse is over given control </summary>
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public static bool IsMouseOver(this Control control)
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{
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return control.ClientRectangle.Contains(control.PointToClient(Cursor.Position));
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}
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/// <summary> Collects controls under mouse cursor </summary>
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public static IEnumerable<Control> GetChildrenUnderMouse(this Control parent)
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{
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foreach (var c in parent.Controls.Cast<Control>())
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{
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if (c.IsMouseOver())
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yield return c;
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foreach (var cc in GetChildrenUnderMouse(c))
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yield return cc;
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}
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}
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#endregion
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/// Button 에 image 를 입힌다. text 는 왼쪽, image 는 오른쪽
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public static void AddImage(this Button button, Image image)
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{
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button.Image = image;
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button.ImageAlign = ContentAlignment.MiddleRight;
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button.TextAlign = ContentAlignment.MiddleLeft;
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}
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}
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}
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