Fix AlignLeft / AlignRight when using Flip Board view

Fixes: lp:1734377
* https://bugs.launchpad.net/kicad/+bug/1734377

pcbnew/tools/placement_tool.cpp

@@ -186,6 +186,21 @@ int ALIGN_DISTRIBUTE_TOOL::AlignBottom( const TOOL_EVENT& aEvent )
 
 
 int ALIGN_DISTRIBUTE_TOOL::AlignLeft( const TOOL_EVENT& aEvent )
+{
+    // Because this tool uses bounding boxes and they aren't mirrored even when
+    // the view is mirrored, we need to call the other one if mirrored.
+    if( getView()->IsMirroredX() )
+    {
+        return doAlignRight();
+    }
+    else
+    {
+        return doAlignLeft();
+    }
+}
+
+
+int ALIGN_DISTRIBUTE_TOOL::doAlignLeft()
 {
     const SELECTION& selection = m_selectionTool->GetSelection();
 
@@ -223,6 +238,21 @@ int ALIGN_DISTRIBUTE_TOOL::AlignLeft( const TOOL_EVENT& aEvent )
 
 
 int ALIGN_DISTRIBUTE_TOOL::AlignRight( const TOOL_EVENT& aEvent )
+{
+    // Because this tool uses bounding boxes and they aren't mirrored even when
+    // the view is mirrored, we need to call the other one if mirrored.
+    if( getView()->IsMirroredX() )
+    {
+        return doAlignLeft();
+    }
+    else
+    {
+        return doAlignRight();
+    }
+}
+
+
+int ALIGN_DISTRIBUTE_TOOL::doAlignRight()
 {
     const SELECTION& selection = m_selectionTool->GetSelection();
 

pcbnew/tools/placement_tool.h

@@ -81,6 +81,23 @@ public:
     void setTransitions() override;
 
 private:
+
+    /**
+     * Sets X coordinate of the selected items to the value of the left-most selected item X coordinate.
+     *
+     * NOTE: Uses the bounding box of items, which do not get mirrored even when
+     * the view is mirrored!
+     */
+    int doAlignLeft();
+
+    /**
+     * Aligns selected items using the right edge of their bounding boxes to the right-most item
+     *
+     * NOTE: Uses the bounding box of items, which do not get mirrored even when
+     * the view is mirrored!
+     */
+    int doAlignRight();
+
     SELECTION_TOOL* m_selectionTool;
 
     CONTEXT_MENU* m_placementMenu;