Added support for shift-tabbing to previous controls in the inspector.

src/XUI.xojo_project

@@ -264,6 +264,7 @@ Class=XUICELine;XUI/XUICodeEditor/XUICELine.xojo_code;&h00000000691297FF;&h00000
 Class=XUICEObjoScriptFormatter;XUI/XUICodeEditor/Code Editor Formatters/XUICEObjoScriptFormatter.xojo_code;&h00000000490E5FFF;&h000000000E9FB7FF;false
 Folder=Inspector Items;XUI/XUIInspector/Inspector Items;&h000000002CB847FF;&h000000007F4C67FF;false
 Interface=XUIInspectorItemKeyHandler;XUI/XUIInspector/Inspector Items/XUIInspectorItemKeyHandler.xojo_code;&h00000000696E17FF;&h000000002CB847FF;false
+Interface=XUIInspectorItemWithMultipleTabFocusControls;XUI/XUIInspector/Inspector Items/XUIInspectorItemWithMultipleTabFocusControls.xojo_code;&h00000000524887FF;&h000000002CB847FF;false
 Interface=XUIInspectorItem;XUI/XUIInspector/Inspector Items/XUIInspectorItem.xojo_code;&h000000002CCDEFFF;&h000000002CB847FF;false
 Class=XUIInspectorCheckBoxItem;XUI/XUIInspector/Inspector Items/XUIInspectorCheckBoxItem.xojo_code;&h00000000271837FF;&h000000002CB847FF;false
 Class=XUIInspectorSwitchItem;XUI/XUIInspector/Inspector Items/XUIInspectorSwitchItem.xojo_code;&h0000000074F607FF;&h000000002CB847FF;false
@@ -285,7 +286,6 @@ Class=XUIInspectorTextFieldRenderer;XUI/XUIInspector/XUIInspectorTextFieldRender
 Folder=Inspector;Demo Windows/UI Controls/Inspector;&h00000000236ADFFF;&h0000000013F79FFF;false
 DesktopWindow=WinInspector;Demo Windows/UI Controls/Inspector/WinInspector.xojo_window;&h000000007420DFFF;&h00000000236ADFFF;false
 Module=XUI;XUI/Required/XUI.xojo_code;&h0000000075C34FFF;&h0000000049AEC7FF;false
-Interface=XUIInspectorItemWithMultipleTabFocusControls;XUI/XUIInspector/Inspector Items/XUIInspectorItemWithMultipleTabFocusControls.xojo_code;&h00000000524887FF;&h000000002CB847FF;false
 AppMenuBar=BasicMenuBar
 MajorVersion=2
 MinorVersion=1

src/XUI/XUIInspector/Inspector Items/XUIInspectorCheckBoxItem.xojo_code

@@ -18,7 +18,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -37,6 +37,16 @@ Implements XUIInspectorItem
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorColorGroupItem.xojo_code

@@ -18,7 +18,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -39,6 +39,16 @@ Implements XUIInspectorItem
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorColorItem.xojo_code

@@ -18,7 +18,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -38,6 +38,16 @@ Implements XUIInspectorItem
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorDualTextFieldItem.xojo_code

@@ -32,8 +32,23 @@ Implements XUIInspectorItem,XUIInspectorItemKeyHandler,XUIInspectorItemWithMulti
 		End Function
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 52657475726E732054727565206966207072657373696E672074686520226261636B2074616222206B657920636F6D626F2073686F756C64206D6F76652074686520666F63757320746F20612070726576696F757320636F6E74726F6C2077697468696E2074686973206974656D2E
+		Function CanAcceptBackTab() As Boolean
+		  /// Returns True if pressing the "back tab" key combo should move the focus to a previous control within this item.
+		  ///
+		  /// Part of the `XUIInspectorItemWithMultipleTabFocusControls` interface.
+
+		  If TopHasFocus Then
+		    Return False
+		  Else
+		    Return True
+		  End If
+
+		End Function
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return True
@@ -58,6 +73,25 @@ Implements XUIInspectorItem,XUIInspectorItemKeyHandler,XUIInspectorItemWithMulti
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  If Not TopHasFocus And Not BottomHasFocus Then
+		    // If nothing has the focus, give the bottom text field the focus.
+		    LostFocus
+		    BottomHasFocus = True
+		    mBottomTextField.SelectAll
+		  ElseIf BottomHasFocus Then
+		    LostFocus
+		    TopHasFocus = True
+		    mTopTextField.SelectAll
+		  End If
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorFullWidthButtonItem.xojo_code

@@ -22,7 +22,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -39,6 +39,16 @@ Implements XUIInspectorItem
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorItem.xojo_code

@@ -13,11 +13,17 @@ Protected Interface XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 
 		End Function
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 

src/XUI/XUIInspector/Inspector Items/XUIInspectorItemWithMultipleTabFocusControls.xojo_code

@@ -6,6 +6,12 @@ Protected Interface XUIInspectorItemWithMultipleTabFocusControls
 		End Function
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 52657475726E732054727565206966207072657373696E672074686520226261636B2074616222206B657920636F6D626F2073686F756C64206D6F76652074686520666F63757320746F20612070726576696F757320636F6E74726F6C2077697468696E2074686973206974656D2E
+		Function CanAcceptBackTab() As Boolean
+
+		End Function
+	#tag EndMethod
+
 
 	#tag Note, Name = About
 		Items implementing this interface contain more than one control that can accept the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorPopupItem.xojo_code

@@ -22,7 +22,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -53,6 +53,16 @@ Implements XUIInspectorItem
 		End Function
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorSwitchItem.xojo_code

@@ -18,7 +18,7 @@ Implements XUIInspectorItem
 	#tag EndMethod
 
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return False
@@ -37,6 +37,16 @@ Implements XUIInspectorItem
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  // Nothing to do since this item can't accept the focus via the back-tab key combo. 
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/Inspector Items/XUIInspectorTextFieldItem.xojo_code

@@ -21,8 +21,18 @@ Implements XUIInspectorItem,XUIInspectorItemKeyHandler
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 52657475726E732054727565206966207072657373696E672074686520226261636B2074616222206B657920636F6D626F2073686F756C64206D6F76652074686520666F63757320746F20612070726576696F757320636F6E74726F6C2077697468696E2074686973206974656D2E
+		Function CanAcceptBackTab() As Boolean
+		  /// Returns True if pressing the "back tab" key combo should move the focus to a previous control within this item.
+		  ///
+		  /// Part of the `XUIInspectorItemWithMultipleTabFocusControls` interface.
+
+		  Return True
+		End Function
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 52657475726E7320547275652069662074686973206974656D2069732061626C6520746F206163636570742074686520666F637573207669612074686520746162206B65792E
-		Function CanAcceptTabFocus() As Boolean
+		Function CanAcceptTab() As Boolean
 		  /// Returns True if this item is able to accept the focus via the tab key.
 
 		  Return True
@@ -46,6 +56,18 @@ Implements XUIInspectorItem,XUIInspectorItemKeyHandler
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F63757320766961207468652073686966742D746162206B657920636F6D626F202874686520226261636B2074616222292E
+		Sub DidReceiveBackTab()
+		  /// This item has just received the focus via the shift-tab key combo (the "back tab").
+		  ///
+		  /// Part of the `XUIInspectorItem` interface.
+
+		  HasFocus = True
+		  mTextField.SelectAll
+
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h0, Description = 54686973206974656D20686173206A7573742072656365697665642074686520666F637573207669612074686520746162206B65792E
 		Sub DidReceiveTabFocus()
 		  /// This item has just received the focus via the tab key.

src/XUI/XUIInspector/XUIInspector.xojo_code

@@ -7,6 +7,10 @@ Inherits NSScrollViewCanvas
 
 		  If command = CmdInsertTab Then
 		    MoveFocusToNextItem
+
+		  ElseIf command = CmdInsertBacktab Then
+		    MoveFocusToPreviousItem
+
 		  Else
 		    // Delegate to the item currently in focus.
 		    If ItemWithFocus <> Nil And ItemWithFocus IsA XUIInspectorItemKeyHandler Then
@@ -641,6 +645,48 @@ Inherits NSScrollViewCanvas
 		End Sub
 	#tag EndMethod
 
+	#tag Method, Flags = &h21, Description = 4D6F7665732074686520666F63757320746F207468652070726576696F7573206974656D20746861742063616E20616363657074207468652074616220666F6375732E
+		Private Sub MoveFocusToPreviousItem()
+		  /// Moves the focus to the previous item that can accept the tab focus.
+
+		  If ItemWithFocus = Nil Then
+		    // Give the focus to the first item that can accept tab focus.
+		    MoveFocusToFirstItem
+		    Return
+		  End If
+
+		  If SectionWithFocus = Nil Then Return
+
+		  // Start at the current section and loop backwards through all visible sections
+		  // until we get back to the current section.
+
+		  Var currentSectionIndex As Integer = mSections.IndexOf(SectionWithFocus)
+		  If currentSectionIndex < 0 Or currentSectionIndex > mSections.LastIndex Then Return
+		  For i As Integer = currentSectionIndex DownTo 0
+		    Var result As XUIInspectorItem = mSections(i).MoveFocusToPreviousItem(ItemWithFocus)
+		    If result <> Nil Then
+		      ItemWithFocus = result
+		      ItemWithFocus.DidReceiveBackTab
+		      Return
+		    End If
+		  Next i
+
+		  // Haven't found an item moving up the inspector that can receive the tab focus.
+		  // Start at the bottom of the inspector, moving up to the current section.
+		  For i As Integer = mSections.LastIndex DownTo currentSectionIndex
+		    Var result As XUIInspectorItem = mSections(i).MoveFocusToPreviousItem(ItemWithFocus)
+		    If result <> Nil Then
+		      ItemWithFocus = result
+		      ItemWithFocus.DidReceiveBackTab
+		      Return
+		    End If
+		  Next i
+
+		  // If we've reached here then there is no item to move the focus to.
+
+		End Sub
+	#tag EndMethod
+
 	#tag Method, Flags = &h21, Description = 52656275696C64732074686520696E7465726E616C207069637475726520746861742069732072656E646572656420746F2074686520696E73706563746F72277320677261706869637320636F6E746578742E
 		Private Sub RebuildBackBuffer()
 		  /// Rebuilds the internal picture that is rendered to the inspector's graphics context.