回答編集履歴
1
見直しキャンペーン中
answer
CHANGED
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YAmaGNZさん 2020/08/05 23:24 のコメントのざっくり実装です。
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同様のものを作るのは大変なので、以下のように置き換えさせていただきます。
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ユーザーコントロール → Form1(Form)
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SplitContainerを拡張したコンポーネント → ParentPanel(FlowLayoutPanel)
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SplitterPanelを拡張したコンポーネント → ChildPanel(Panel)
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ChildPanelの追加・削除時にイベント登録・解除して、新しく作った専用のイベントにまわすだけです。
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本題に関係ないコードのほうが多いですが、ポイントはコメントが入ってる部分だけです。
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```
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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.Windows.Forms;
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namespace Questions282825
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{
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public partial class Form1 : Form
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{
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private ParentPanel parentPanel;
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private ListBox listBox;
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public Form1()
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{
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InitializeComponent();
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parentPanel = new ParentPanel() { Dock = DockStyle.Fill, };
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// 子供クリックイベントの登録
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parentPanel.ChildClick += ParentPanel_ChildClick;
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Controls.Add(parentPanel);
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var addButton = new Button { Dock = DockStyle.Bottom, Text = "add", };
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addButton.Click += AddButton_Click;
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var clearButton = new Button { Dock = DockStyle.Top, Text = "clear", };
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clearButton.Click += ClearButton_Click;
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var tableLayoutPanel = new TableLayoutPanel { Dock = DockStyle.Left, Width = 80, };
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tableLayoutPanel.Controls.Add(addButton, 0, 0);
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tableLayoutPanel.Controls.Add(clearButton, 0, 1);
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tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 50F));
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tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 50F));
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Controls.Add(tableLayoutPanel);
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listBox = new ListBox { Dock = DockStyle.Left, SelectionMode = SelectionMode.MultiSimple, };
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listBox.DataSource = new Color[] { Color.Red, Color.Green, Color.Blue, };
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Controls.Add(listBox);
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}
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private void ParentPanel_ChildClick(object sender, EventArgs e)
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{
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if(sender is Control control)
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{
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Debug.WriteLine($"{control.Name} {control.BackColor}");
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}
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}
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private void AddButton_Click(object sender, EventArgs e)
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{
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var colors = listBox.SelectedItems.Cast<Color>();
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parentPanel.AddRange(colors);
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}
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private void ClearButton_Click(object sender, EventArgs e)
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{
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parentPanel.Clear();
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}
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class ParentPanel : FlowLayoutPanel
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{
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// 新しく作った子供クリックイベント
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public event EventHandler ChildClick;
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public void AddRange(IEnumerable<Color> colors)
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{
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foreach(var color in colors)
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{
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var child = new ChildPanel(color);
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// 追加時にイベント登録
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child.Click += Child_Click;
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Controls.Add(child);
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}
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}
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public void Clear()
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{
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foreach(var child in Controls.Cast<Control>().ToArray())
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{
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// 削除時にイベント解除
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child.Click -= Child_Click;
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Controls.Remove(child);
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child.Dispose();
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}
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}
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private void Child_Click(object sender, EventArgs e)
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{
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// 子供クリックイベントを発砲(sender e そのまま渡しは雑い^^;
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ChildClick?.Invoke(sender, e);
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}
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}
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class ChildPanel : Panel
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{
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private static int i;
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public ChildPanel(Color color)
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{
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Name = $"Panel{++i}";
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Width = 100;
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Height = 100;
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BackColor = color;
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}
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}
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}
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}
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```
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> そのたびにSplitterPanelに対してイベントを付与する必要
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もしかして「やれるのはわかっているが、いちいち登録解除がめんどくさい」って意味でしょうか?
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こんなソリューションがありました(この要件だとオーバーすぎる気がしますが)
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[Broadcasting Events through a Control Hierarchy - CodeProject](https://www.codeproject.com/Articles/13216/Broadcasting-Events-through-a-Control-Hierarchy)
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たしか無料登録しないとダウンロードできなかったと思うので、面倒な場合こちら(おそらく↑そのまま)
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[POSTSTAR/EventBroadcastProvider.cs at master · ohintaek/POSTSTAR](https://github.com/ohintaek/POSTSTAR/blob/master/PostStar.Basic/Common/EventBroadcastProvider.cs)
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最初読み違えて`SplitContainer`を多段に入れ子すると思っていたので、そんな作りになってしまっています^^;
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```
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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.Windows.Forms;
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namespace Questions282825
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{
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public partial class Form1 : Form
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{
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public Form1()
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{
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InitializeComponent();
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var splitContainer = new MySplitContainer();
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Controls.Add(splitContainer);
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// どちらにしろこれは必須
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var broadcastProvider = EventBroadcastProvider.CreateProvider(splitContainer, "Click");
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// 単にクリックが拾えればいい場合
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splitContainer.Click += SplitContainer_Click;
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// クリックされたコントロールやツリーも欲しい場合
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broadcastProvider.Relayed += BroadcastProvider_Relayed;
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}
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private void SplitContainer_Click(object sender, EventArgs e)
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{
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Debug.WriteLine("Click");
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}
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private void BroadcastProvider_Relayed(object sender, RelayedEventArgs e)
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{
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if(e.RelayChain[0] is Control control)
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{
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Debug.WriteLine($"{control.Name} {control.BackColor}");
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}
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}
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// 本題には関係ないが検証用に雑に作成
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class MySplitContainer : SplitContainer
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{
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private static List<KnownColor> colors;
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private static Random random = new Random();
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private static int i;
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private static ContextMenuStrip contextMenuStrip;
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private static ToolStripMenuItem addToolStripMenuItem;
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private static ToolStripMenuItem delToolStripMenuItem;
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static MySplitContainer()
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{
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colors = Enum.GetValues(typeof(KnownColor)).Cast<KnownColor>().ToList();
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addToolStripMenuItem = new ToolStripMenuItem { Text = "追加", };
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addToolStripMenuItem.Click += AddToolStripMenuItem_Click;
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delToolStripMenuItem = new ToolStripMenuItem { Text = "削除", };
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delToolStripMenuItem.Click += DelToolStripMenuItem_Click;
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contextMenuStrip = new ContextMenuStrip();
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contextMenuStrip.Items.Add(addToolStripMenuItem);
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contextMenuStrip.Items.Add(delToolStripMenuItem);
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}
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public MySplitContainer()
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{
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BorderStyle = BorderStyle.Fixed3D;
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Dock = DockStyle.Fill;
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Panel1.Name = $"Panel{++i}";
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Panel2.Name = $"Panel{++i}";
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Panel1.ContextMenuStrip = contextMenuStrip;
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Panel2.ContextMenuStrip = contextMenuStrip;
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Panel1.BackColor = Color.FromKnownColor(colors.Skip(random.Next(0, colors.Count)).First());
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Panel2.BackColor = Color.FromKnownColor(colors.Skip(random.Next(0, colors.Count)).First());
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}
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private static void AddToolStripMenuItem_Click(object sender, EventArgs e)
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{
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if(sender is ToolStripItem item)
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{
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if(item.Owner is ContextMenuStrip menuStrip)
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{
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if(menuStrip.SourceControl is SplitterPanel panel)
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{
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var o = (int)Orientation.Vertical;
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if(panel.Parent is SplitContainer container)
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{
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o = (int)container.Orientation;
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o ^= 1;
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}
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var sc = new MySplitContainer { Orientation = (Orientation)o };
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panel.Controls.Add(sc);
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}
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}
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}
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}
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private static void DelToolStripMenuItem_Click(object sender, EventArgs e)
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{
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if(sender is ToolStripItem item)
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{
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if(item.Owner is ContextMenuStrip menuStrip)
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{
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if(menuStrip.SourceControl is SplitterPanel panel)
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{
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if(panel.Parent is SplitContainer container)
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{
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container.Parent.Controls.Remove(container);
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container.Dispose();
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}
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}
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}
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}
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}
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}
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}
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}
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1
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+
YAmaGNZさん 2020/08/05 23:24 のコメントのざっくり実装です。
|
2
|
+
|
3
|
+
同様のものを作るのは大変なので、以下のように置き換えさせていただきます。
|
4
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+
ユーザーコントロール → Form1(Form)
|
5
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+
SplitContainerを拡張したコンポーネント → ParentPanel(FlowLayoutPanel)
|
6
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+
SplitterPanelを拡張したコンポーネント → ChildPanel(Panel)
|
7
|
+
|
8
|
+
ChildPanelの追加・削除時にイベント登録・解除して、新しく作った専用のイベントにまわすだけです。
|
9
|
+
本題に関係ないコードのほうが多いですが、ポイントはコメントが入ってる部分だけです。
|
10
|
+
|
11
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+
```cs
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12
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using System;
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13
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+
using System.Collections.Generic;
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14
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+
using System.Diagnostics;
|
15
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+
using System.Drawing;
|
16
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+
using System.Linq;
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17
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+
using System.Windows.Forms;
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18
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+
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19
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namespace Questions282825
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20
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{
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public partial class Form1 : Form
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{
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private ParentPanel parentPanel;
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private ListBox listBox;
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public Form1()
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{
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InitializeComponent();
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parentPanel = new ParentPanel() { Dock = DockStyle.Fill, };
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// 子供クリックイベントの登録
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parentPanel.ChildClick += ParentPanel_ChildClick;
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Controls.Add(parentPanel);
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var addButton = new Button { Dock = DockStyle.Bottom, Text = "add", };
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addButton.Click += AddButton_Click;
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var clearButton = new Button { Dock = DockStyle.Top, Text = "clear", };
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clearButton.Click += ClearButton_Click;
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var tableLayoutPanel = new TableLayoutPanel { Dock = DockStyle.Left, Width = 80, };
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tableLayoutPanel.Controls.Add(addButton, 0, 0);
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tableLayoutPanel.Controls.Add(clearButton, 0, 1);
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tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 50F));
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tableLayoutPanel.RowStyles.Add(new RowStyle(SizeType.Percent, 50F));
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Controls.Add(tableLayoutPanel);
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listBox = new ListBox { Dock = DockStyle.Left, SelectionMode = SelectionMode.MultiSimple, };
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listBox.DataSource = new Color[] { Color.Red, Color.Green, Color.Blue, };
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Controls.Add(listBox);
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}
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private void ParentPanel_ChildClick(object sender, EventArgs e)
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55
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{
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56
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if(sender is Control control)
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57
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{
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58
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Debug.WriteLine($"{control.Name} {control.BackColor}");
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}
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}
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private void AddButton_Click(object sender, EventArgs e)
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{
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var colors = listBox.SelectedItems.Cast<Color>();
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parentPanel.AddRange(colors);
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}
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private void ClearButton_Click(object sender, EventArgs e)
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{
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parentPanel.Clear();
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}
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class ParentPanel : FlowLayoutPanel
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{
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// 新しく作った子供クリックイベント
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public event EventHandler ChildClick;
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78
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+
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79
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public void AddRange(IEnumerable<Color> colors)
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{
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81
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foreach(var color in colors)
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{
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var child = new ChildPanel(color);
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85
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// 追加時にイベント登録
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child.Click += Child_Click;
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87
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Controls.Add(child);
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}
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}
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public void Clear()
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{
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foreach(var child in Controls.Cast<Control>().ToArray())
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{
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// 削除時にイベント解除
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child.Click -= Child_Click;
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Controls.Remove(child);
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child.Dispose();
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}
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}
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101
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private void Child_Click(object sender, EventArgs e)
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103
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{
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// 子供クリックイベントを発砲(sender e そのまま渡しは雑い^^;
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105
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ChildClick?.Invoke(sender, e);
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106
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}
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107
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+
}
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108
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+
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109
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class ChildPanel : Panel
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110
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{
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111
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private static int i;
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public ChildPanel(Color color)
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{
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Name = $"Panel{++i}";
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Width = 100;
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117
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Height = 100;
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118
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BackColor = color;
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119
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}
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120
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}
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121
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}
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}
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+
```
|
124
|
+
|
125
|
+
> そのたびにSplitterPanelに対してイベントを付与する必要
|
126
|
+
|
127
|
+
もしかして「やれるのはわかっているが、いちいち登録解除がめんどくさい」って意味でしょうか?
|
128
|
+
|
129
|
+
こんなソリューションがありました(この要件だとオーバーすぎる気がしますが)
|
130
|
+
[Broadcasting Events through a Control Hierarchy - CodeProject](https://www.codeproject.com/Articles/13216/Broadcasting-Events-through-a-Control-Hierarchy)
|
131
|
+
たしか無料登録しないとダウンロードできなかったと思うので、面倒な場合こちら(おそらく↑そのまま)
|
132
|
+
[POSTSTAR/EventBroadcastProvider.cs at master · ohintaek/POSTSTAR](https://github.com/ohintaek/POSTSTAR/blob/master/PostStar.Basic/Common/EventBroadcastProvider.cs)
|
133
|
+
|
134
|
+
最初読み違えて`SplitContainer`を多段に入れ子すると思っていたので、そんな作りになってしまっています^^;
|
135
|
+
|
136
|
+
```cs
|
137
|
+
using System;
|
138
|
+
using System.Collections.Generic;
|
139
|
+
using System.Diagnostics;
|
140
|
+
using System.Drawing;
|
141
|
+
using System.Linq;
|
142
|
+
using System.Windows.Forms;
|
143
|
+
|
144
|
+
namespace Questions282825
|
145
|
+
{
|
146
|
+
public partial class Form1 : Form
|
147
|
+
{
|
148
|
+
public Form1()
|
149
|
+
{
|
150
|
+
InitializeComponent();
|
151
|
+
|
152
|
+
var splitContainer = new MySplitContainer();
|
153
|
+
Controls.Add(splitContainer);
|
154
|
+
|
155
|
+
// どちらにしろこれは必須
|
156
|
+
var broadcastProvider = EventBroadcastProvider.CreateProvider(splitContainer, "Click");
|
157
|
+
|
158
|
+
// 単にクリックが拾えればいい場合
|
159
|
+
splitContainer.Click += SplitContainer_Click;
|
160
|
+
|
161
|
+
// クリックされたコントロールやツリーも欲しい場合
|
162
|
+
broadcastProvider.Relayed += BroadcastProvider_Relayed;
|
163
|
+
}
|
164
|
+
|
165
|
+
private void SplitContainer_Click(object sender, EventArgs e)
|
166
|
+
{
|
167
|
+
Debug.WriteLine("Click");
|
168
|
+
}
|
169
|
+
|
170
|
+
private void BroadcastProvider_Relayed(object sender, RelayedEventArgs e)
|
171
|
+
{
|
172
|
+
if(e.RelayChain[0] is Control control)
|
173
|
+
{
|
174
|
+
Debug.WriteLine($"{control.Name} {control.BackColor}");
|
175
|
+
}
|
176
|
+
}
|
177
|
+
|
178
|
+
|
179
|
+
// 本題には関係ないが検証用に雑に作成
|
180
|
+
class MySplitContainer : SplitContainer
|
181
|
+
{
|
182
|
+
private static List<KnownColor> colors;
|
183
|
+
private static Random random = new Random();
|
184
|
+
private static int i;
|
185
|
+
|
186
|
+
private static ContextMenuStrip contextMenuStrip;
|
187
|
+
private static ToolStripMenuItem addToolStripMenuItem;
|
188
|
+
private static ToolStripMenuItem delToolStripMenuItem;
|
189
|
+
|
190
|
+
static MySplitContainer()
|
191
|
+
{
|
192
|
+
colors = Enum.GetValues(typeof(KnownColor)).Cast<KnownColor>().ToList();
|
193
|
+
|
194
|
+
addToolStripMenuItem = new ToolStripMenuItem { Text = "追加", };
|
195
|
+
addToolStripMenuItem.Click += AddToolStripMenuItem_Click;
|
196
|
+
|
197
|
+
delToolStripMenuItem = new ToolStripMenuItem { Text = "削除", };
|
198
|
+
delToolStripMenuItem.Click += DelToolStripMenuItem_Click;
|
199
|
+
|
200
|
+
contextMenuStrip = new ContextMenuStrip();
|
201
|
+
contextMenuStrip.Items.Add(addToolStripMenuItem);
|
202
|
+
contextMenuStrip.Items.Add(delToolStripMenuItem);
|
203
|
+
}
|
204
|
+
|
205
|
+
public MySplitContainer()
|
206
|
+
{
|
207
|
+
BorderStyle = BorderStyle.Fixed3D;
|
208
|
+
Dock = DockStyle.Fill;
|
209
|
+
|
210
|
+
Panel1.Name = $"Panel{++i}";
|
211
|
+
Panel2.Name = $"Panel{++i}";
|
212
|
+
|
213
|
+
Panel1.ContextMenuStrip = contextMenuStrip;
|
214
|
+
Panel2.ContextMenuStrip = contextMenuStrip;
|
215
|
+
|
216
|
+
Panel1.BackColor = Color.FromKnownColor(colors.Skip(random.Next(0, colors.Count)).First());
|
217
|
+
Panel2.BackColor = Color.FromKnownColor(colors.Skip(random.Next(0, colors.Count)).First());
|
218
|
+
}
|
219
|
+
|
220
|
+
private static void AddToolStripMenuItem_Click(object sender, EventArgs e)
|
221
|
+
{
|
222
|
+
if(sender is ToolStripItem item)
|
223
|
+
{
|
224
|
+
if(item.Owner is ContextMenuStrip menuStrip)
|
225
|
+
{
|
226
|
+
if(menuStrip.SourceControl is SplitterPanel panel)
|
227
|
+
{
|
228
|
+
var o = (int)Orientation.Vertical;
|
229
|
+
if(panel.Parent is SplitContainer container)
|
230
|
+
{
|
231
|
+
o = (int)container.Orientation;
|
232
|
+
o ^= 1;
|
233
|
+
}
|
234
|
+
|
235
|
+
var sc = new MySplitContainer { Orientation = (Orientation)o };
|
236
|
+
panel.Controls.Add(sc);
|
237
|
+
}
|
238
|
+
}
|
239
|
+
}
|
240
|
+
}
|
241
|
+
|
242
|
+
private static void DelToolStripMenuItem_Click(object sender, EventArgs e)
|
243
|
+
{
|
244
|
+
if(sender is ToolStripItem item)
|
245
|
+
{
|
246
|
+
if(item.Owner is ContextMenuStrip menuStrip)
|
247
|
+
{
|
248
|
+
if(menuStrip.SourceControl is SplitterPanel panel)
|
249
|
+
{
|
250
|
+
if(panel.Parent is SplitContainer container)
|
251
|
+
{
|
252
|
+
container.Parent.Controls.Remove(container);
|
253
|
+
container.Dispose();
|
254
|
+
}
|
255
|
+
}
|
256
|
+
}
|
257
|
+
}
|
258
|
+
}
|
259
|
+
}
|
260
|
+
}
|
261
|
+
}
|
262
262
|
```
|