Fix for ticket #611 (add a "don't show this again toggle" to the snap

g_j_m · g_j_m · commit 286c3e4245f5 · 2007-11-27T09:14:36.000Z
vertex warning dialog box) Also includes a small re-organisation of the QgsMessageViewer class git-svn-id: http://svn.osgeo.org/qgis/trunk@7668 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/app/composer/qgscomposer.cpp b/src/app/composer/qgscomposer.cpp
@@ -776,9 +776,10 @@ void QgsComposer::on_mActionExportAsSVG_activated(void)
 // QT 4 QPicture does not support export to SVG, so we're still using Q3Picture.
 // When QGIS moves to Qt 4.3, we can use QSvgGenerator instead.
 
+  QString myQSettingsLabel = "/UI/displaySVGWarning";
   QSettings myQSettings;
 
-  bool displaySVGWarning = myQSettings.value("/UI/displaySVGWarning", true).toBool();
+  bool displaySVGWarning = myQSettings.value(myQSettingsLabel, true).toBool();
 
   if (displaySVGWarning)
   {
@@ -787,6 +788,7 @@ void QgsComposer::on_mActionExportAsSVG_activated(void)
     m->setCheckBoxText(tr("Don't show this message again"));
     m->setCheckBoxState(Qt::Unchecked);
     m->setCheckBoxVisible(true);
+    m->setCheckBoxQSettingsLabel(myQSettingsLabel);
     m->setMessageAsHtml(tr("<p>The SVG export function in Qgis has several "
                            "problems due to bugs and deficiencies in the "
                            "Qt4 svg code. Of note, text does not "
@@ -799,17 +801,6 @@ void QgsComposer::on_mActionExportAsSVG_activated(void)
                            "satisfactory."
                            "</p>"));
     m->exec();
-
-    if (m->checkBoxState() == Qt::Checked)
-    {
-      myQSettings.setValue("/UI/displaySVGWarning", false); //turn off the warning next time
-    }
-    else
-    {
-      myQSettings.setValue("/UI/displaySVGWarning", true);
-    }
-    //delete m; // this causes a segfault
-
   }
   QString myLastUsedFile = myQSettings.readEntry("/UI/lastSaveAsSvgFile","qgis.svg");
   QFileInfo file(myLastUsedFile);
diff --git a/src/app/qgsmaptoolvertexedit.cpp b/src/app/qgsmaptoolvertexedit.cpp
@@ -24,10 +24,11 @@
 #include "qgsmaptopixel.h"
 #include "qgsproject.h"
 #include "qgscursors.h"
+#include "qgsmessageviewer.h"
 #include <QMessageBox>
 #include <QPixmap>
 #include <QCursor>
-
+#include <QSettings>
 
 QgsMapToolVertexEdit::QgsMapToolVertexEdit(QgsMapCanvas* canvas, enum Tool tool)
   : QgsMapTool(canvas), mTool(tool), mRubberBandIndex1(-1), mRubberBandIndex2(-1), mRubberBand(0)
@@ -128,8 +129,7 @@ void QgsMapToolVertexEdit::canvasPressEvent(QMouseEvent * e)
 	//Find nearest segment of the selected line, move that node to the mouse location
 	if (!snapSegmentWithContext(layerPoint))
 	  {
-	    QMessageBox::warning(0, QObject::tr("Error"), 
-				QObject::tr("Could not snap segment. Have you set the tolerance in Settings > Project Properties > General?"));
+            displaySnapToleranceWarning();
 	    return;
 	  }
 	
@@ -170,17 +170,15 @@ void QgsMapToolVertexEdit::canvasPressEvent(QMouseEvent * e)
       {
 	if(!snapVertexWithContext(snapPoint))
 	  {
-	    QMessageBox::warning(0, QObject::tr("Error"), 
-				QObject::tr("Could not snap segment. Have you set the tolerance in Settings > Project Properties > General?"));
+            displaySnapToleranceWarning();
 	    return;
 	  }
       }
     else //snap to segment and take the closest vertex in case of line/multiline/polygon/multipolygon layers
       {
 	if (!snapSegmentWithContext(snapPoint))
 	  {
-	    QMessageBox::warning(0, QObject::tr("Error"), 
-				QObject::tr("Could not snap segment. Have you set the tolerance in Settings > Project Properties > General?"));
+            displaySnapToleranceWarning();
 	    return;
 	  }
 	
@@ -258,6 +256,28 @@ double QgsMapToolVertexEdit::tolerance()
   return QgsProject::instance()->readDoubleEntry("Digitizing","/Tolerance",0);
 }
 
+void QgsMapToolVertexEdit::displaySnapToleranceWarning()
+{
+  QSettings myQSettings;
+  QString myQSettingsLabel = "/UI/displaySnapWarning";
+  bool displaySnapWarning = myQSettings.value(myQSettingsLabel, true).toBool();
+
+  if (displaySnapWarning)
+  {
+    QgsMessageViewer* m = new QgsMessageViewer(0);
+    m->setWindowTitle(tr("Snap tolerance"));
+    m->setCheckBoxText(tr("Don't show this message again"));
+    m->setCheckBoxVisible(true);
+    m->setCheckBoxQSettingsLabel(myQSettingsLabel);
+    m->setMessageAsHtml("<p>" + 
+                        tr("Could not snap segment.") +
+                        "</p><p>" +
+                        tr("Have you set the tolerance in "
+                           "Settings > Project Properties > General?") +
+                        "</p>");
+    m->exec();
+  }
+}
 
 bool QgsMapToolVertexEdit::snapSegmentWithContext(QgsPoint& point)
 {
diff --git a/src/app/qgsmaptoolvertexedit.h b/src/app/qgsmaptoolvertexedit.h
@@ -65,6 +65,9 @@ class QgsMapToolVertexEdit : public QgsMapTool
 
     //! current vertex edit tool
     enum Tool mTool;
+
+    //! Displays a warning about the snap tolerance settings
+    void displaySnapToleranceWarning();
     
     /**Searches the closest point within the project tolerance and setx  mSnappedAtFeatureId and mSnappedAtVertex*/
     bool snapVertexWithContext(QgsPoint& point);
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
@@ -27,6 +27,7 @@ qgsencodingfiledialog.h
 qgslayerprojectionselector.h
 qgsmapcanvas.h
 qgsmapoverviewcanvas.h
+qgsmessageviewer.h
 qgsmaptoolemitpoint.h
 qgsprojectionselector.h
 )
diff --git a/src/gui/qgsmessageviewer.cpp b/src/gui/qgsmessageviewer.cpp
@@ -17,7 +17,7 @@
 /* $Id$ */
 
 #include "qgsmessageviewer.h"
-
+#include <QSettings>
 
 QgsMessageViewer::QgsMessageViewer(QWidget *parent, Qt::WFlags fl)
 : QDialog(parent, fl)
@@ -28,6 +28,8 @@ QgsMessageViewer::QgsMessageViewer(QWidget *parent, Qt::WFlags fl)
   // Default state for the checkbox
   setCheckBoxVisible(false);
   setCheckBoxState(Qt::Unchecked);
+
+  mCheckBoxQSettingsLabel = "";
 }
 
 QgsMessageViewer::~QgsMessageViewer()
@@ -86,7 +88,20 @@ void QgsMessageViewer::setCheckBoxState(Qt::CheckState state)
   checkBox->setCheckState(state);
 }
 
-Qt::CheckState QgsMessageViewer::checkBoxState()
+void QgsMessageViewer::setCheckBoxQSettingsLabel(QString label)
+{
+  mCheckBoxQSettingsLabel = label;
+}
+
+
+void QgsMessageViewer::on_checkBox_toggled(bool toggled)
 {
-  return checkBox->checkState();
+  if (!mCheckBoxQSettingsLabel.isEmpty())
+    {
+      QSettings settings;
+      if (checkBox->checkState() == Qt::Checked)
+        settings.setValue(mCheckBoxQSettingsLabel, false);
+      else
+        settings.setValue(mCheckBoxQSettingsLabel, true);
+    }
 }
diff --git a/src/gui/qgsmessageviewer.h b/src/gui/qgsmessageviewer.h
@@ -22,8 +22,11 @@
 #include <qgisgui.h>
 #include "qgsmessageoutput.h"
 
+#include <QString>
+
 class GUI_EXPORT QgsMessageViewer: public QDialog, public QgsMessageOutput, private Ui::QgsMessageViewer
 {
+  Q_OBJECT
   public:
     QgsMessageViewer(QWidget *parent = 0, Qt::WFlags fl = QgisGui::ModalDialogFlags);
     ~QgsMessageViewer();
@@ -51,8 +54,16 @@ class GUI_EXPORT QgsMessageViewer: public QDialog, public QgsMessageOutput, priv
     void setCheckBoxVisible(bool visible);
     // Sets the check state
     void setCheckBoxState(Qt::CheckState state);
-    // The state of the checkbox
-    Qt::CheckState checkBoxState();
+    // Specifies a QSettings tag to store/retrieve the checkbox
+    // state to/from. Use an empty QString to disable this feature.
+    void setCheckBoxQSettingsLabel(QString label);
+
+ private slots:
+   void on_checkBox_toggled(bool);
+
+
+ private:
+    QString mCheckBoxQSettingsLabel;
 };
 
 #endif

Original file line number	Diff line number	Diff line change
`@@ -27,6 +27,7 @@ qgsencodingfiledialog.h`
`27`	`27`	`qgslayerprojectionselector.h`
`28`	`28`	`qgsmapcanvas.h`
`29`	`29`	`qgsmapoverviewcanvas.h`
	`30`	`+qgsmessageviewer.h`
`30`	`31`	`qgsmaptoolemitpoint.h`
`31`	`32`	`qgsprojectionselector.h`
`32`	`33`	`)`