Merge pull request #2884 from shun-iwasawa/g/fix_fold_column_slipping

Fix folded columns slipping

toonz/sources/include/toonz/columnfan.h

@@ -93,6 +93,9 @@ of column identified by \b col.
 
   void saveData(TOStream &os);
   void loadData(TIStream &is);
+
+  void rollLeftFoldedState(int index, int count);
+  void rollRightFoldedState(int index, int count);
 };
 
 #endif

toonz/sources/toonz/xsheetdragtool.cpp

@@ -49,6 +49,7 @@
 #include "toonz/txshnoteset.h"
 #include "toutputproperties.h"
 #include "toonz/preferences.h"
+#include "toonz/columnfan.h"
 
 // TnzBase includes
 #include "tfx.h"
@@ -1222,8 +1223,9 @@ public:
 
 XsheetGUI::DragTool *XsheetGUI::DragTool::makeKeyFrameHandleMoverTool(
     XsheetViewer *viewer, bool isEaseOut, int keyRow) {
-  return new KeyFrameHandleMoverTool(
-      viewer, isEaseOut ? KeyFrameHandleMoverTool::EaseOut
+  return new KeyFrameHandleMoverTool(viewer,
+                                     isEaseOut
+                                         ? KeyFrameHandleMoverTool::EaseOut
                                          : KeyFrameHandleMoverTool::EaseIn,
                                      keyRow);
 }
@@ -1694,11 +1696,22 @@ public:
       col = 0;
     else if (!getViewer()->orientation()->isVerticalTimeline() && col > currEnd)
       col = currEnd;
+
     int dCol = col - (m_lastCol - m_offset);
 
     // ignore if the cursor moves in the drag-starting column
     if (dCol == 0) return;
 
+    if (dCol < 0 &&
+        !xsh->getColumnFan(getViewer()->orientation())->isActive(col)) {
+      while (
+          col != 0 &&
+          !xsh->getColumnFan(getViewer()->orientation())->isActive(col - 1)) {
+        col--;
+        dCol--;
+      }
+    }
+
     int newBegin = *indices.begin() + dCol;
     int newEnd   = *indices.rbegin() + dCol;
 

toonz/sources/toonzlib/columnfan.cpp

@@ -178,3 +178,58 @@ void ColumnFan::loadData(TIStream &is) {
     for (j = 0; j < count; j++) deactivate(index + j);
   }
 }
+
+//-----------------------------------------------------------------------------
+
+void ColumnFan::rollLeftFoldedState(int index, int count) {
+  assert(index >= 0);
+  assert(count > 1);
+  int columnCount = m_columns.size();
+  if (columnCount <= index) return;
+  if (index + count - 1 > columnCount) count = columnCount - index + 1;
+  if (count < 2) return;
+
+  int i = index, j = index + count - 1;
+  bool tmp = isActive(i);
+
+  for (int k = i; k < j; ++k) {
+    if (isActive(k) && !isActive(k + 1))
+      deactivate(k);
+    else if (!isActive(k) && isActive(k + 1))
+      activate(k);
+  }
+  if (isActive(j) && !tmp)
+    deactivate(j);
+  else if (!isActive(j) && tmp)
+    activate(j);
+
+  update();
+}
+
+//-----------------------------------------------------------------------------
+
+void ColumnFan::rollRightFoldedState(int index, int count) {
+  assert(index >= 0);
+  assert(count > 1);
+
+  int columnCount = m_columns.size();
+  if (columnCount <= index) return;
+  if (index + count - 1 > columnCount) count = columnCount - index + 1;
+  if (count < 2) return;
+
+  int i = index, j = index + count - 1;
+  bool tmp = isActive(j);
+
+  for (int k = j; k > i; --k) {
+    if (isActive(k) && !isActive(k - 1))
+      deactivate(k);
+    else if (!isActive(k) && isActive(k - 1))
+      activate(k);
+  }
+  if (isActive(i) && !tmp)
+    deactivate(i);
+  else if (!isActive(i) && tmp)
+    activate(i);
+
+  update();
+}

toonz/sources/toonzlib/txsheet.cpp

@@ -1318,6 +1318,11 @@ void TXsheet::insertColumn(int col, TXshColumn *column) {
     TFx *fx = column->getFx();
     if (fx) getFxDag()->addToXsheet(fx);
   }
+
+  for (ColumnFan &columnFan : m_imp->m_columnFans) {
+    columnFan.rollRightFoldedState(col,
+                                   m_imp->m_columnSet.getColumnCount() - col);
+  }
 }
 
 //-----------------------------------------------------------------------------
@@ -1336,6 +1341,11 @@ void TXsheet::removeColumn(int col) {
   }
   m_imp->m_columnSet.removeColumn(col);
   m_imp->m_pegTree->removeColumn(col);
+
+  for (ColumnFan &columnFan : m_imp->m_columnFans) {
+    columnFan.rollLeftFoldedState(col,
+                                  m_imp->m_columnSet.getColumnCount() - col);
+  }
 }
 
 //-----------------------------------------------------------------------------
@@ -1363,12 +1373,16 @@ void TXsheet::moveColumn(int srcIndex, int dstIndex) {
     int c1 = dstIndex;
     assert(c0 < c1);
     m_imp->m_columnSet.rollLeft(c0, c1 - c0 + 1);
+    for (ColumnFan &columnFan : m_imp->m_columnFans)
+      columnFan.rollLeftFoldedState(c0, c1 - c0 + 1);
     for (int c = c0; c < c1; ++c) m_imp->m_pegTree->swapColumns(c, c + 1);
   } else {
     int c0 = dstIndex;
     int c1 = srcIndex;
     assert(c0 < c1);
     m_imp->m_columnSet.rollRight(c0, c1 - c0 + 1);
+    for (ColumnFan &columnFan : m_imp->m_columnFans)
+      columnFan.rollRightFoldedState(c0, c1 - c0 + 1);
     for (int c = c1 - 1; c >= c0; --c) m_imp->m_pegTree->swapColumns(c, c + 1);
   }
 }