[GUI] Improve de-selection in Scene Hierarchy tab

- improved de-selection perfomance
- selected objects count is now displayed in the status bar
- "Select none" renamed to "Clear selection"

AssetStudioGUI/AssetStudioGUIForm.Designer.cs

@@ -121,10 +121,10 @@
             this.toolStripStatusLabel1 = new System.Windows.Forms.ToolStripStatusLabel();
             this.contextMenuStrip2 = new System.Windows.Forms.ContextMenuStrip(this.components);
             this.selectAllToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
-            this.selectNoneToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.clearSelectionToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.toolStripSeparator5 = new System.Windows.Forms.ToolStripSeparator();
-            this.collapseAllToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.expandAllToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.collapseAllToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.timer = new System.Windows.Forms.Timer(this.components);
             this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
             this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
@@ -1046,7 +1046,7 @@
             // 
             this.contextMenuStrip2.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
             this.selectAllToolStripMenuItem,
-            this.selectNoneToolStripMenuItem,
+            this.clearSelectionToolStripMenuItem,
             this.toolStripSeparator5,
             this.expandAllToolStripMenuItem,
             this.collapseAllToolStripMenuItem});
@@ -1060,25 +1060,18 @@
             this.selectAllToolStripMenuItem.Text = "Select all";
             this.selectAllToolStripMenuItem.Click += new System.EventHandler(this.selectAllToolStripMenuItem_Click);
             // 
-            // selectNoneToolStripMenuItem
+            // clearSelectionToolStripMenuItem
             // 
-            this.selectNoneToolStripMenuItem.Name = "selectNoneToolStripMenuItem";
+            this.clearSelectionToolStripMenuItem.Name = "clearSelectionToolStripMenuItem";
-            this.selectNoneToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            this.clearSelectionToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
-            this.selectNoneToolStripMenuItem.Text = "Select none";
+            this.clearSelectionToolStripMenuItem.Text = "Clear selection";
-            this.selectNoneToolStripMenuItem.Click += new System.EventHandler(this.selectNoneToolStripMenuItem_Click);
+            this.clearSelectionToolStripMenuItem.Click += new System.EventHandler(this.clearSelectionToolStripMenuItem_Click);
             // 
             // toolStripSeparator5
             // 
             this.toolStripSeparator5.Name = "toolStripSeparator5";
             this.toolStripSeparator5.Size = new System.Drawing.Size(177, 6);
             // 
-            // collapseAllToolStripMenuItem
-            // 
-            this.collapseAllToolStripMenuItem.Name = "collapseAllToolStripMenuItem";
-            this.collapseAllToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
-            this.collapseAllToolStripMenuItem.Text = "Collapse all";
-            this.collapseAllToolStripMenuItem.Click += new System.EventHandler(this.collapseAllToolStripMenuItem_Click);
-            // 
             // expandAllToolStripMenuItem
             // 
             this.expandAllToolStripMenuItem.Name = "expandAllToolStripMenuItem";
@@ -1086,6 +1079,13 @@
             this.expandAllToolStripMenuItem.Text = "Expand all";
             this.expandAllToolStripMenuItem.Click += new System.EventHandler(this.expandAllToolStripMenuItem_Click);
             // 
+            // collapseAllToolStripMenuItem
+            // 
+            this.collapseAllToolStripMenuItem.Name = "collapseAllToolStripMenuItem";
+            this.collapseAllToolStripMenuItem.Size = new System.Drawing.Size(180, 22);
+            this.collapseAllToolStripMenuItem.Text = "Collapse all";
+            this.collapseAllToolStripMenuItem.Click += new System.EventHandler(this.collapseAllToolStripMenuItem_Click);
+            // 
             // timer
             // 
             this.timer.Interval = 10;
@@ -1307,7 +1307,7 @@
         private System.Windows.Forms.CheckBox filterExcludeMode;
         private System.Windows.Forms.ContextMenuStrip contextMenuStrip2;
         private System.Windows.Forms.ToolStripMenuItem selectAllToolStripMenuItem;
-        private System.Windows.Forms.ToolStripMenuItem selectNoneToolStripMenuItem;
+        private System.Windows.Forms.ToolStripMenuItem clearSelectionToolStripMenuItem;
         private System.Windows.Forms.ToolStripSeparator toolStripSeparator5;
         private System.Windows.Forms.ToolStripMenuItem collapseAllToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem expandAllToolStripMenuItem;

AssetStudioGUI/AssetStudioGUIForm.cs

@@ -95,6 +95,11 @@ namespace AssetStudioGUI
         private int nextGObject;
         private List<TreeNode> treeSrcResults = new List<TreeNode>();
 
+        //tree selection
+        private List<TreeNode> treeNodeSelectedList = new List<TreeNode>();
+        private bool treeRecursionEnabled = true;
+        private bool isRecursionEvent = false;
+
         private string openDirectoryBackup = string.Empty;
         private string saveDirectoryBackup = string.Empty;
 
@@ -571,10 +576,38 @@ namespace AssetStudioGUI
 
         private void sceneTreeView_AfterCheck(object sender, TreeViewEventArgs e)
         {
+            if (!treeRecursionEnabled)
+                return;
+
+            if (!isRecursionEvent)
+            {
+                if (e.Node.Checked)
+                {
+                    treeNodeSelectedList.Add(e.Node);
+                }
+                else
+                {
+                    treeNodeSelectedList.Remove(e.Node);
+                }
+            }
+
             foreach (TreeNode childNode in e.Node.Nodes)
             {
+                isRecursionEvent = true;
+                bool wasChecked = childNode.Checked;
                 childNode.Checked = e.Node.Checked;
+                if (!wasChecked && childNode.Checked)
+                {
+                    treeNodeSelectedList.Add(childNode);
+                }
+                else if (!childNode.Checked)
+                {
+                    treeNodeSelectedList.Remove(childNode);
+                }
             }
+            isRecursionEvent = false;
+
+            StatusStripUpdate($"Selected {treeNodeSelectedList.Count} object(s).");
         }
 
         private void listSearch_Enter(object sender, EventArgs e)
@@ -1738,22 +1771,22 @@ namespace AssetStudioGUI
 
         private void selectAllToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            sceneTreeView.BeginUpdate();
             foreach (TreeNode node in sceneTreeView.Nodes)
             {
                 node.Checked = true;
             }
-            sceneTreeView.EndUpdate();
         }
 
-        private void selectNoneToolStripMenuItem_Click(object sender, EventArgs e)
+        private void clearSelectionToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            sceneTreeView.BeginUpdate();
+            treeRecursionEnabled = false;
-            foreach (TreeNode node in sceneTreeView.Nodes)
+            for(var i = 0; i < treeNodeSelectedList.Count; i++)
             {
-                node.Checked = false;
+                treeNodeSelectedList[i].Checked = false;
             }
-            sceneTreeView.EndUpdate();
+            treeRecursionEnabled = true;
+            treeNodeSelectedList.Clear();
+            StatusStripUpdate($"Selected {treeNodeSelectedList.Count} object(s).");
         }
 
         private void expandAllToolStripMenuItem_Click(object sender, EventArgs e)

AssetStudioGUI/AssetStudioGUIForm.resx

@@ -120,6 +120,9 @@
   <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>312, 17</value>
   </metadata>
+  <metadata name="statusStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>432, 17</value>
+  </metadata>
   <data name="fontPreviewBox.Text" xml:space="preserve">
     <value>abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWYZ
 1234567890.:,;'\"(!?)+-*/=
@@ -138,9 +141,6 @@ The quick brown fox jumps over the lazy dog. 1234567890
 
 The quick brown fox jumps over the lazy dog. 1234567890</value>
   </data>
-  <metadata name="statusStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>432, 17</value>
-  </metadata>
   <metadata name="contextMenuStrip2.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
     <value>775, 21</value>
   </metadata>