Add Display Origin Transforms support to the PCB_BASE_FRAME class

This commit adds support for display origin transforms to the PCB_BASE_FRAME
class. This instantiates a PCB_ORIGIN_TRANSFORMS object, and overrides the
GetOriginTransforms method in the EDA_DRAW_FRAME class to reference it.

The formatting of the status line has been updated to display coordinates
relative to the user-selected origin, and with the coordinates increasing
in the user-selected direction.

include/pcb_base_frame.h

@@ -42,6 +42,7 @@
 #include <pcb_display_options.h>
 #include <pcb_draw_panel_gal.h>
 #include <lib_id.h>
+#include <pcb_origin_transforms.h>
 
 /* Forward declarations of classes. */
 class APP_SETTINGS_BASE;
@@ -77,6 +78,8 @@ protected:
 
     PCB_DISPLAY_OPTIONS     m_DisplayOptions;
 
+    PCB_ORIGIN_TRANSFORMS   m_OriginTransforms;
+
     PCBNEW_SETTINGS*        m_Settings; // No ownership, just a shortcut
 
     virtual void unitsChangeRefresh() override;
@@ -144,6 +147,15 @@ public:
     const wxPoint& GetGridOrigin() const override;
     void SetGridOrigin( const wxPoint& aPoint ) override;
 
+    const wxPoint& GetAuxOrigin() const;
+
+    const wxPoint GetUserOrigin() const;
+
+    /**
+     * Return a reference to the default ORIGIN_TRANSFORMS object
+     */
+    ORIGIN_TRANSFORMS& GetOriginTransforms() override;
+
     const TITLE_BLOCK& GetTitleBlock() const override;
     void SetTitleBlock( const TITLE_BLOCK& aTitleBlock ) override;
 

pcbnew/pcb_base_frame.cpp

@@ -59,7 +59,8 @@ PCB_BASE_FRAME::PCB_BASE_FRAME( KIWAY* aKiway, wxWindow* aParent, FRAME_T aFrame
         const wxString& aTitle, const wxPoint& aPos, const wxSize& aSize,
         long aStyle, const wxString & aFrameName ) :
     EDA_DRAW_FRAME( aKiway, aParent, aFrameType, aTitle, aPos, aSize, aStyle, aFrameName ),
-    m_Pcb( nullptr )
+    m_Pcb( nullptr ),
+    m_OriginTransforms( *this )
 {
     m_Settings = static_cast<PCBNEW_SETTINGS*>( Kiface().KifaceSettings() );
 }
@@ -269,6 +270,43 @@ void PCB_BASE_FRAME::SetGridOrigin( const wxPoint& aPoint )
 }
 
 
+const wxPoint& PCB_BASE_FRAME::GetAuxOrigin() const
+{
+    wxASSERT( m_Pcb );
+    return m_Pcb->GetDesignSettings().m_AuxOrigin;
+}
+
+
+const wxPoint PCB_BASE_FRAME::GetUserOrigin() const
+{
+    auto& displ_opts = GetDisplayOptions();
+    wxPoint origin( 0, 0 );
+
+    switch( displ_opts.m_DisplayOrigin )
+    {
+    case PCB_DISPLAY_OPTIONS::PCB_ORIGIN_PAGE:
+        // No-op
+        break;
+    case PCB_DISPLAY_OPTIONS::PCB_ORIGIN_AUX:
+        origin = GetAuxOrigin();
+        break;
+    case PCB_DISPLAY_OPTIONS::PCB_ORIGIN_GRID:
+        origin = GetGridOrigin();
+        break;
+    default:
+        wxASSERT( false );
+        break;
+    }
+
+    return origin;
+}
+
+ORIGIN_TRANSFORMS& PCB_BASE_FRAME::GetOriginTransforms()
+{
+    return m_OriginTransforms;
+}
+
+
 const TITLE_BLOCK& PCB_BASE_FRAME::GetTitleBlock() const
 {
     wxASSERT( m_Pcb );
@@ -526,9 +564,13 @@ void PCB_BASE_FRAME::UpdateStatusBar()
         SetStatusText( line, 3 );
     }
 
+    // Transform absolute coordinates for user origin preferences
+    double userXpos = m_OriginTransforms.ToDisplayAbsX( static_cast<double>( cursorPos.x ) );
+    double userYpos = m_OriginTransforms.ToDisplayAbsY( static_cast<double>( cursorPos.y ) );
+
     // Display absolute coordinates:
-    double dXpos = To_User_Unit( GetUserUnits(), cursorPos.x );
+    double dXpos = To_User_Unit( GetUserUnits(), userXpos );
-    double dYpos = To_User_Unit( GetUserUnits(), cursorPos.y );
+    double dYpos = To_User_Unit( GetUserUnits(), userYpos );
 
     // The following sadly is an if Eeschema/if Pcbnew
     wxString absformatter;
@@ -561,9 +603,17 @@ void PCB_BASE_FRAME::UpdateStatusBar()
 
     if( !GetShowPolarCoords() )  // display relative cartesian coordinates
     {
+        // Calculate relative coordinates
+        double relXpos = cursorPos.x - screen->m_LocalOrigin.x;
+        double relYpos = cursorPos.y - screen->m_LocalOrigin.y;
+
+        // Transform relative coordinates for user origin preferences
+        userXpos = m_OriginTransforms.ToDisplayRelX( relXpos );
+        userYpos = m_OriginTransforms.ToDisplayRelY( relYpos );
+
         // Display relative coordinates:
-        dXpos = To_User_Unit( GetUserUnits(), cursorPos.x - screen->m_LocalOrigin.x );
+        dXpos = To_User_Unit( GetUserUnits(), userXpos );
-        dYpos = To_User_Unit( GetUserUnits(), cursorPos.y - screen->m_LocalOrigin.y );
+        dYpos = To_User_Unit( GetUserUnits(), userYpos );
 
         // We already decided the formatter above
         line.Printf( locformatter, dXpos, dYpos, hypot( dXpos, dYpos ) );