Fixed crash when opening help several times.

wb/lib/wb/qt/wb_wtt_qt.cqt

@@ -2443,7 +2443,7 @@ void OptionsDialog::activate_options_cancel()
 }
 
 OptionsDialog::OptionsDialog(WttQt *parent_ctx, QWidget *parent)
-    : QDialog(parent), wtt(parent_ctx)
+    : QDialog(), wtt(parent_ctx)
 {
   setMinimumSize(650, 450);
   setWindowTitle(fl("Options"));
@@ -2455,7 +2455,7 @@ OptionsDialog::OptionsDialog(WttQt *parent_ctx, QWidget *parent)
   wtt->show_plant_w = new QCheckBox(fl("Plant Configuration"), this);
   wtt->show_node_w = new QCheckBox(fl("Node Configuration"), this);
 
-  QVBoxLayout *hier_vbox = new QVBoxLayout(this);
+  QVBoxLayout *hier_vbox = new QVBoxLayout();
   hier_vbox->addWidget(hier_label);
   hier_vbox->addWidget(wtt->enable_comment_w);
   hier_vbox->addWidget(wtt->enable_revisions_w);
@@ -2471,7 +2471,7 @@ OptionsDialog::OptionsDialog(WttQt *parent_ctx, QWidget *parent)
   wtt->show_attrref_w = new QCheckBox(fl("Attribute Reference"), this);
   wtt->show_attrxref_w = new QCheckBox(fl("Attribute Cross Reference"), this);
 
-  QVBoxLayout *entry_vbox = new QVBoxLayout(this);
+  QVBoxLayout *entry_vbox = new QVBoxLayout();
   entry_vbox->addWidget(entry_label);
   entry_vbox->addWidget(wtt->show_class_w);
   entry_vbox->addWidget(wtt->show_alias_w);
@@ -2490,7 +2490,7 @@ OptionsDialog::OptionsDialog(WttQt *parent_ctx, QWidget *parent)
   wtt->build_manual_w = new QCheckBox(fl("Manual"), this);
   wtt->build_nocopy_w = new QCheckBox(fl("Disable Copy"), this);
 
-  QVBoxLayout *build_vbox = new QVBoxLayout(this);
+  QVBoxLayout *build_vbox = new QVBoxLayout();
   build_vbox->addWidget(build_label);
   build_vbox->addWidget(wtt->build_force_w);
   build_vbox->addWidget(wtt->build_debug_w);
@@ -2500,7 +2500,7 @@ OptionsDialog::OptionsDialog(WttQt *parent_ctx, QWidget *parent)
   build_vbox->addWidget(wtt->build_manual_w);
   build_vbox->addWidget(wtt->build_nocopy_w);
 
-  QHBoxLayout *hbox = new QHBoxLayout(this);
+  QHBoxLayout *hbox = new QHBoxLayout();
   hbox->addLayout(hier_vbox);
   hbox->addWidget(separator(QFrame::VLine));
   hbox->addLayout(entry_vbox);

xtt/lib/cow/qt/cow_xhelp_qt.cqt

@@ -208,7 +208,6 @@ CoXHelpQt::CoXHelpQt(QWidget *xa_parent_wid, void *xa_parent_ctx,
   toplevel->setToolTip(fl("cow_xhelp widget"));
   toplevel->setFixedSize(700, 600);
   toplevel->setWindowTitle(fl(title));
-  toplevel->setAttribute(Qt::WA_DeleteOnClose);
 
   CoWowQt::SetWindowIcon(toplevel);
 

xtt/lib/cow/qt/cow_xhelpnav_qt.cpp

@@ -68,7 +68,7 @@ CoXHelpNavQt::CoXHelpNavQt(void *xn_parent_ctx, QWidget *xn_parent_wid,
                            QWidget **w, pwr_tStatus *status)
     : CoXHelpNav(xn_parent_ctx, xn_name, xn_utility, status)
 {
-  debug_print("creating a scrolledbrowwidgetqt\n");
+  debug_print("CoXHelpNavQt: creating a scrolledbrowwidgetqt\n");
   form_widget = scrolledbrowwidgetqt_new(CoXHelpNav::init_brow_base_cb, this,
                                          &brow_widget);
 

xtt/lib/flow/qt/flow_draw_qt.cqt

@@ -1582,7 +1582,7 @@ void FlowDrawQt::clear(FlowCtx *ctx)
   painter->setBackground(QBrush(background));
 
   //debug_print("clear color=%s\n", painter->background().color().name().toAscii().data());
-  painter->eraseRect(window->rect());
+  painter->eraseRect(window_canvas->rect());
   
   delete painter;
 }
@@ -1595,7 +1595,7 @@ void FlowDrawQt::nav_clear(FlowCtx *ctx)
   painter->setBackground(QBrush(background));
 
   //debug_print("nav_clear color=%s\n", painter->background().color().name().toAscii().data());
-  painter->eraseRect(nav_window->rect());
+  painter->eraseRect(nav_window_canvas->rect());
   
   delete painter;
 }

xtt/lib/flow/qt/flow_scroll_widget_qt.cqt

@@ -46,12 +46,11 @@
 
 #include "cow_qt_helpers.h"
 
-QImage QtScrollWidgetFlow::createBuffer(QSize size)
+void QtScrollWidgetFlow::createBuffer(QSize size)
 {
-  QImage image = QImage(size, QImage::Format_RGB32);
+  this->image = QImage(size, QImage::Format_RGB32);
   QPainter imPainter(&image);
   imPainter.fillRect(image.rect(), palette().color(QPalette::Background));
-  return image;
 }
 
 void QtScrollWidgetFlow::init(
@@ -59,7 +58,7 @@ void QtScrollWidgetFlow::init(
     void *client_data, int (*init_proc2)(QWidget *w, FlowCtx *ctx,
                                             void *client_data))
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   this->init_proc = init_proc;
   this->init_widget_proc = init_proc2;
@@ -71,7 +70,7 @@ QWidget *QtScrollWidgetFlow::initScroll(
     void *client_data, int (*init_proc2)(QWidget *w, FlowCtx *ctx,
                                          void *client_data))
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   this->init_proc = init_proc;
   this->init_widget_proc = init_proc2;
@@ -103,7 +102,7 @@ bool QScrollAreaFlow::event(QEvent *event)
 
 void QtScrollWidgetFlow::init(unsigned int eCtxType, QWidget *main)
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   is_navigator = 1;
   main_widget = main;
@@ -260,7 +259,7 @@ void QtScrollWidgetFlow::handleEvent(QEvent *event)
 bool QtScrollWidgetFlow::event(QEvent *event)
 {
   if (event->type() == QEvent::Resize) {
-    this->image = createBuffer(((QResizeEvent *) event)->size());
+    createBuffer(((QResizeEvent *) event)->size());
   }
   if (!is_realized && (event->type() == QEvent::Show || event->type() == QEvent::Resize)) {
     realize();

xtt/lib/flow/qt/flow_scroll_widget_qt.h

@@ -122,7 +122,7 @@ protected:
   unsigned int ctxType;
 
 private:
-  QImage createBuffer(QSize size);
+  void createBuffer(QSize size);
 
 public slots:
   void scroll_h_action(int value);

xtt/lib/glow/qt/glow_draw_qt.cqt

@@ -1498,7 +1498,7 @@ void GlowDrawQt::clear(GlowWind *wind)
   DrawWindQt *w = (DrawWindQt *) wind->window;
 
   if (!w->double_buffer_on) {
-    QPainter(w->buffer).eraseRect(w->window->rect());
+    QPainter(w->buffer).eraseRect(w->buffer->rect());
   } else {
     buffer_background(w, 0);
   }

xtt/lib/glow/qt/glow_scroll_widget_qt.cqt

@@ -46,12 +46,11 @@
 
 #include "cow_qt_helpers.h"
 
-QImage QtScrollWidgetGlow::createBuffer(QSize size)
+void QtScrollWidgetGlow::createBuffer(QSize size)
 {
-  QImage image = QImage(size, QImage::Format_RGB32);
+  this->image = QImage(size, QImage::Format_RGB32);
   QPainter imPainter(&image);
   imPainter.fillRect(image.rect(), palette().color(QPalette::Background));
-  return image;
 }
 
 void QtScrollWidgetGlow::init(
@@ -59,7 +58,7 @@ void QtScrollWidgetGlow::init(
     void *client_data, int (*init_proc2)(QWidget *w, GlowCtx *ctx,
                                          void *client_data))
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   this->init_proc = init_proc;
   this->init_widget_proc = init_proc2;
@@ -71,7 +70,7 @@ QWidget *QtScrollWidgetGlow::initScroll(
     void *client_data, int (*init_proc2)(QWidget *w, GlowCtx *ctx,
                                          void *client_data))
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   this->init_proc = init_proc;
   this->init_widget_proc = init_proc2;
@@ -103,7 +102,7 @@ bool QScrollAreaGlow::event(QEvent *event)
 
 void QtScrollWidgetGlow::init(unsigned int eCtxType, QWidget *main)
 {
-  this->image = createBuffer(size());
+  createBuffer(size());
   this->ctxType = eCtxType;
   is_navigator = 1;
   main_widget = main;
@@ -260,7 +259,7 @@ void QtScrollWidgetGlow::handleEvent(QEvent *event)
 bool QtScrollWidgetGlow::event(QEvent *event)
 {
   if (event->type() == QEvent::Resize) {
-    this->image = createBuffer(((QResizeEvent *) event)->size());
+    createBuffer(((QResizeEvent *) event)->size());
   }
   if (!is_realized && (event->type() == QEvent::Show || event->type() == QEvent::Resize)) {
     realize();

xtt/lib/glow/qt/glow_scroll_widget_qt.h

@@ -122,7 +122,7 @@ protected:
   unsigned int ctxType;
 
 private:
-  QImage createBuffer(QSize size);
+  void createBuffer(QSize size);
 
 public slots:
   void scroll_h_action(int value);