Add triple click to select all in TextBox

osu.Framework.Tests/Visual/UserInterface/TestSceneTextBox.cs

@@ -917,6 +917,50 @@ public void TestTextChangedDuringDoubleClickDrag()
             AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
         }
 
+        [Test]
+        public void TestTripleClickSelectAll()
+        {
+            InsertableTextBox textBox = null;
+
+            AddStep("add textbox", () =>
+            {
+                textBoxes.Add(textBox = new InsertableTextBox
+                {
+                    Size = new Vector2(300, 40),
+                    Text = "multiple words so a double click cant select it all",
+                });
+            });
+
+            AddStep("move to textbox", () => InputManager.MoveMouseTo(textBox));
+
+            AddStep("triple click", () =>
+            {
+                InputManager.Click(MouseButton.Left);
+                InputManager.Click(MouseButton.Left);
+                InputManager.Click(MouseButton.Left);
+            });
+            AddAssert("all text selected", () => textBox.SelectedText, () => Is.EqualTo(textBox.Text));
+
+            AddStep("double click", () =>
+            {
+                InputManager.Click(MouseButton.Left);
+                InputManager.Click(MouseButton.Left);
+            });
+            AddWaitStep("wait to fail triple click", 2);
+            AddStep("third click", () => InputManager.Click(MouseButton.Left));
+            AddAssert("no text selected", () => textBox.SelectedText, () => Is.EqualTo(string.Empty));
+
+            AddStep("triple click drag", () =>
+            {
+                InputManager.Click(MouseButton.Left);
+                InputManager.Click(MouseButton.Left);
+                InputManager.PressButton(MouseButton.Left);
+            });
+            AddStep("start drag", () => InputManager.MoveMouseTo(textBox.ScreenSpaceDrawQuad.TopLeft - new Vector2(200f, 0f)));
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+            AddAssert("all text selected", () => textBox.SelectedText, () => Is.EqualTo(textBox.Text));
+        }
+
         [Test]
         public void TestSelectAll()
         {

osu.Framework/Graphics/UserInterface/TextBox.cs

@@ -1308,7 +1308,7 @@ protected override void OnDrag(DragEvent e)
 
             FinalizeImeComposition(true);
 
-            if (ignoreOngoingDragSelection)
+            if (ignoreOngoingDragSelection || tripleClickOngoing)
                 return;
 
             var lastSelectionBounds = getTextSelectionBounds();
@@ -1349,8 +1349,12 @@ protected override void OnDrag(DragEvent e)
             onTextSelectionChanged(doubleClickWord != null ? TextSelectionType.Word : TextSelectionType.Character, lastSelectionBounds);
         }
 
+        private double? lastDoubleClickTime;
+
         protected override bool OnDoubleClick(DoubleClickEvent e)
         {
+            lastDoubleClickTime = Time.Current;
+
             FinalizeImeComposition(true);
 
             var lastSelectionBounds = getTextSelectionBounds();
@@ -1396,6 +1400,8 @@ private static int findSeparatorIndex(string input, int searchPos, int direction
             return -1;
         }
 
+        private bool tripleClickOngoing;
+
         protected override bool OnMouseDown(MouseDownEvent e)
         {
             if (ReadOnly)
@@ -1405,6 +1411,21 @@ protected override bool OnMouseDown(MouseDownEvent e)
 
             var lastSelectionBounds = getTextSelectionBounds();
 
+            float tripleClickTime = GetContainingInputManager().AsNonNull().GetButtonEventManagerFor(e.Button).DoubleClickTime;
+
+            if (lastDoubleClickTime != null && Time.Current - lastDoubleClickTime < tripleClickTime)
+            {
+                lastDoubleClickTime = null;
+
+                SelectAll();
+
+                onTextSelectionChanged(TextSelectionType.All, lastSelectionBounds);
+
+                tripleClickOngoing = true;
+
+                return true;
+            }
+
             selectionStart = selectionEnd = getCharacterClosestTo(e.MousePosition);
 
             cursorAndLayout.Invalidate();
@@ -1417,6 +1438,7 @@ protected override bool OnMouseDown(MouseDownEvent e)
         protected override void OnMouseUp(MouseUpEvent e)
         {
             doubleClickWord = null;
+            tripleClickOngoing = false;
         }
 
         protected override void OnFocusLost(FocusLostEvent e)