Work around EnsureVisible bug in wxWidgets during DRC cross-probe.

Also adds double-click-marker to open DRC dialog and select marker
in list.

Fixes https://gitlab.com/kicad/code/kicad/issues/7246

common/rc_item.cpp

@@ -594,7 +594,7 @@ void RC_TREE_MODEL::NextMarker()
 }
 
 
-void RC_TREE_MODEL::SelectMarker( MARKER_BASE* aMarker )
+void RC_TREE_MODEL::SelectMarker( const MARKER_BASE* aMarker )
 {
     for( RC_TREE_NODE* candidate : m_tree )
     {
@@ -607,6 +607,19 @@ void RC_TREE_MODEL::SelectMarker( MARKER_BASE* aMarker )
 }
 
 
+void RC_TREE_MODEL::CenterMarker( const MARKER_BASE* aMarker )
+{
+    for( RC_TREE_NODE* candidate : m_tree )
+    {
+        if( candidate->m_RcItem->GetParent() == aMarker )
+        {
+            m_view->EnsureVisible( ToItem( candidate ) );
+            break;
+        }
+    }
+}
+
+
 void RC_TREE_MODEL::onSizeView( wxSizeEvent& aEvent )
 {
     int width = m_view->GetMainWindow()->GetRect().GetWidth() - WX_DATAVIEW_WINDOW_PADDING;

include/rc_item.h

@@ -227,7 +227,8 @@ public:
 
     void PrevMarker();
     void NextMarker();
-    void SelectMarker( MARKER_BASE* aMarker );
+    void SelectMarker( const MARKER_BASE* aMarker );
+    void CenterMarker( const MARKER_BASE* aMarker );
 
     bool IsContainer( wxDataViewItem const& aItem ) const override;
 

pcbnew/dialogs/dialog_drc.cpp

@@ -395,7 +395,15 @@ void DIALOG_DRC::OnDRCItemSelected( wxDataViewEvent& aEvent )
         if( board->GetVisibleLayers().test( principalLayer ) )
             m_frame->SetActiveLayer( principalLayer );
 
-        m_frame->FocusOnItem( item, principalLayer );
+        if( m_centerMarkerOnIdle )
+        {
+            // we already came from a cross-probe of the marker in the document; don't go
+            // around in circles
+        }
+        else
+        {
+            m_frame->FocusOnItem( item, principalLayer );
+        }
     }
 
     aEvent.Skip();
@@ -743,16 +751,28 @@ void DIALOG_DRC::NextMarker()
 }
 
 
-void DIALOG_DRC::SelectMarker( PCB_MARKER* aMarker )
+void DIALOG_DRC::SelectMarker( const PCB_MARKER* aMarker )
 {
     if( m_Notebook->IsShown() )
     {
         m_Notebook->SetSelection( 0 );
         m_markersTreeModel->SelectMarker( aMarker );
+
+        // wxWidgets on some platforms fails to correctly ensure that a selected item is
+        // visible, so we have to do it in a separate idle event.
+        m_centerMarkerOnIdle = aMarker;
+        Bind( wxEVT_IDLE, &DIALOG_DRC::centerMarkerIdleHandler, this );
     }
 }
 
 
+void DIALOG_DRC::centerMarkerIdleHandler( wxIdleEvent& aEvent )
+{
+    m_markersTreeModel->CenterMarker( m_centerMarkerOnIdle );
+    Unbind( wxEVT_IDLE, &DIALOG_DRC::centerMarkerIdleHandler, this );
+}
+
+
 void DIALOG_DRC::ExcludeMarker()
 {
     if( !m_Notebook->IsShown() || m_Notebook->GetSelection() != 0 )

pcbnew/dialogs/dialog_drc.h

@@ -57,7 +57,7 @@ public:
 
     void PrevMarker();
     void NextMarker();
-    void SelectMarker( PCB_MARKER* aMarker );
+    void SelectMarker( const PCB_MARKER* aMarker );
 
     void ExcludeMarker();
 
@@ -97,6 +97,8 @@ private:
 
     void OnChangingNotebookPage( wxNotebookEvent& aEvent ) override;
 
+    void centerMarkerIdleHandler( wxIdleEvent& aEvent );
+
     void deleteAllMarkers( bool aIncludeExclusions );
     void refreshEditor();
 
@@ -126,7 +128,9 @@ private:
     RC_ITEMS_PROVIDER* m_footprintWarningsProvider;
     RC_TREE_MODEL*     m_footprintWarningsTreeModel;
 
-    int                m_severities;
+    const PCB_MARKER*  m_centerMarkerOnIdle;
+
+    int                m_severities;        // A mask of SEVERITY flags
 };
 
 #endif  // _DIALOG_DRC_H_

pcbnew/edit.cpp

@@ -40,6 +40,7 @@
 #include <connectivity/connectivity_data.h>
 #include <tool/tool_manager.h>
 #include <tools/pcb_actions.h>
+#include <tools/drc_tool.h>
 #include <dialogs/dialog_dimension_properties.h>
 
 // Handles the selection of command events.
@@ -157,6 +158,10 @@ void PCB_EDIT_FRAME::OnEditItemRequest( BOARD_ITEM* aItem )
         m_toolManager->RunAction( PCB_ACTIONS::groupProperties, true, aItem );
         break;
 
+    case PCB_MARKER_T:
+        m_toolManager->GetTool<DRC_TOOL>()->CrossProbe( static_cast<PCB_MARKER*>( aItem ) );
+        break;
+
     default:
         break;
     }

pcbnew/tools/drc_tool.cpp

@@ -275,7 +275,9 @@ int DRC_TOOL::CrossProbe( const TOOL_EVENT& aEvent )
 
         if( selection.GetSize() == 1 && selection.Front()->Type() == PCB_MARKER_T )
         {
-            m_drcDialog->Show( true );
+            if( !m_drcDialog->IsShown() )
+                m_drcDialog->Show( true );
+
             m_drcDialog->Raise();
             m_drcDialog->SelectMarker( static_cast<PCB_MARKER*>( selection.Front() ) );
         }
@@ -285,6 +287,16 @@ int DRC_TOOL::CrossProbe( const TOOL_EVENT& aEvent )
 }
 
 
+void DRC_TOOL::CrossProbe( const PCB_MARKER* aMarker )
+{
+    if( !IsDRCDialogShown() )
+        ShowDRCDialog( nullptr );
+
+    m_drcDialog->Raise();
+    m_drcDialog->SelectMarker( aMarker );
+}
+
+
 int DRC_TOOL::ExcludeMarker( const TOOL_EVENT& aEvent )
 {
     if( m_drcDialog )

pcbnew/tools/drc_tool.h

@@ -51,17 +51,10 @@ public:
     void Reset( RESET_REASON aReason ) override;
 
     /**
-     * Open a dialog and prompts the user, then if a test run button is
+     * Opens the DRC dialog.  The dialog is only created if it is not already in existence.
-     * clicked, runs the test(s) and creates the MARKERS.  The dialog is only
-     * created if it is not already in existence.
      *
-     * @param aParent is the parent window for wxWidgets. Usually the PCB editor frame
+     * @param aParent is the parent window for modal invocations.  If nullptr, the parent will
-     * but can be another dialog
+     * be the PCB_EDIT_FRAME and the dialog will be modeless.
-     * if aParent == NULL (default), the parent will be the PCB editor frame
-     * and the dialog will be not modal (just float on parent
-     * if aParent is specified, the dialog will be modal.
-     * The modal mode is mandatory if the dialog is created from another dialog, not
-     * from the PCB editor frame
      */
     void ShowDRCDialog( wxWindow* aParent );
 
@@ -69,15 +62,11 @@ public:
 
     /**
      * Check to see if the DRC_TOOL dialog is currently shown
-     *
-     * @return true if the dialog is shown
      */
     bool IsDRCDialogShown();
 
     /**
      * Check to see if the DRC engine is running the tests
-     *
-     * @return true if the DRC engine is running the tests
      */
     bool IsDRCRunning() const { return m_drcRunning; }
 
@@ -98,6 +87,12 @@ public:
     int NextMarker( const TOOL_EVENT& aEvent );
     int CrossProbe( const TOOL_EVENT& aEvent );
 
+    /**
+     * A more "active" CrossProbe which will open the DRC dialog if it is closed.  Used when
+     * double-clicking on a marker.
+     */
+    void CrossProbe( const PCB_MARKER* aMarker );
+
     int ExcludeMarker( const TOOL_EVENT& aEvent );
 
 private: