Fix QtDesigner crash in debug mode

Debug-mode Qt Designer crashed when tried to instantiate a ctkMatrixWidget because of an assert failure.
It may be useful to know that some operations fail, but making the Qt Designer crash is a too strong way of notifying developers (especially when developers only use CTK and not intend to fix its potential internal errors).

Fixed by adding a new CTK_VALIDATE macro that just logs a warning instead of crashing in debug mode and does nothing in release mode. It should be possible to use this macro instead of Q_ASSSERT where crashing the application in unexpected situations should be avoided.

Libs/Core/ctkUtils.h

@@ -30,6 +30,23 @@
 
 #include "ctkCoreExport.h"
 
+/// This macro can be used instead of Q_ASSERT to log a warning when
+/// a condition fails. It logs a warning message in debug mode and
+/// has no effect in release mode.
+#ifndef NDEBUG
+# define CTK_VALIDATE(condition) \
+ { \
+ if (! (condition) ) \
+ { \
+ qWarning() << "Check `" #condition "` failed in " << __FILE__ \
+ << " line " << __LINE__; \
+ } \
+ }
+#else
+# define CTK_VALIDATE(condition)
+#endif
+
+
 namespace ctk {
 ///
 /// \ingroup Core

Libs/Widgets/ctkMatrixWidget.cpp

@@ -21,6 +21,7 @@
 // CTK includes
 #include "ctkMatrixWidget.h"
 #include "ctkDoubleSpinBox.h"
+#include "ctkUtils.h"
 
 // Qt includes
 #include <QDebug>
@@ -238,7 +239,7 @@ void ctkMatrixWidgetPrivate::updateGeometries()
  bool lastColumn = (j==(ccount-1));
  int newWidth = lastColumn ? lastColWidth : colWidth;
  this->Table->setColumnWidth(j, newWidth);
- Q_ASSERT(this->Table->columnWidth(j) == newWidth);
+ CTK_VALIDATE(this->Table->columnWidth(j) == newWidth);
  }
  // rows
  const int rcount = q->rowCount();
@@ -249,7 +250,7 @@ void ctkMatrixWidgetPrivate::updateGeometries()
  bool lastRow = (i==(rcount-1));
  int newHeight = lastRow ? lastRowHeight : rowHeight;
  this->Table->setRowHeight(i, newHeight);
- Q_ASSERT(this->Table->rowHeight(i) == newHeight);
+ CTK_VALIDATE(this->Table->rowHeight(i) == newHeight);
  }
  this->Table->updateGeometry();
 }