[TD]add support for view menu zoom

src/Mod/TechDraw/Gui/MDIViewPage.cpp

@@ -203,6 +203,14 @@ bool MDIViewPage::onMsg(const char* pMsg, const char**)
         Gui::Command::updateActive();
         return true;
     }
+    else if (strcmp("ZoomIn", pMsg) == 0) {
+        zoomIn();
+        return true;
+    }
+    else if (strcmp("ZoomOut", pMsg) == 0) {
+        zoomOut();
+        return true;
+    }
 
     return false;
 }
@@ -236,10 +244,28 @@ bool MDIViewPage::onHasMsg(const char* pMsg) const
     else if (strcmp("PrintAll", pMsg) == 0) {
         return true;
     }
+    else if (strcmp("ZoomIn", pMsg) == 0) {
+        return true;
+    }
+    else if (strcmp("ZoomOut", pMsg) == 0) {
+        return true;
+    }
     return false;
 }
 
-//called by ViewProvider when Page feature Label changes
+// handle a zoomIn message from the menu
+void MDIViewPage::zoomIn()
+{
+    m_vpPage->getQGVPage()->zoomIn();
+}
+
+// handle a zoomOut message from the menu
+void MDIViewPage::zoomOut()
+{
+    m_vpPage->getQGVPage()->zoomOut();
+}
+
+// called by ViewProvider when Page feature Label changes
 void MDIViewPage::setTabText(std::string tabText)
 {
     if (!isPassive() && !tabText.empty()) {

src/Mod/TechDraw/Gui/MDIViewPage.h

@@ -64,7 +64,6 @@ public:
 
     void addChildrenToPage();
 
-
     /// Observer message from the Tree Selection mechanism
     void onSelectionChanged(const Gui::SelectionChanges& msg) override;
     void preSelectionChanged(const QPoint &pos);
@@ -99,9 +98,12 @@ public:
                               TechDraw::DrawPage* dPage,
                               double& width, double& height);
 
-    void saveSVG(std::string file);
-    void saveDXF(std::string file);
-    void savePDF(std::string file);
+    void saveSVG(std::string fileName);
+    void saveDXF(std::string fileName);
+    void savePDF(std::string fileName);
+
+    void zoomIn();
+    void zoomOut();
 
     void setDocumentObject(const std::string&);
     void setDocumentName(const std::string&);

src/Mod/TechDraw/Gui/QGVPage.cpp

@@ -561,6 +561,16 @@ void QGVPage::setPanCursor() { activateCursor(panCursor); }
 
 void QGVPage::setZoomCursor() { activateCursor(zoomCursor); }
 
+void QGVPage::zoomIn()
+{
+    m_navStyle->zoomIn();
+}
+
+void QGVPage::zoomOut()
+{
+    m_navStyle->zoomOut();
+}
+
 void QGVPage::drawForeground(QPainter* painter, const QRectF& rect)
 {
     Q_UNUSED(rect);

src/Mod/TechDraw/Gui/QGVPage.h

@@ -122,6 +122,9 @@ public:
 
     TechDraw::DrawView* getBalloonParent() { return m_balloonParent; }
 
+    void zoomIn();
+    void zoomOut();
+
 public Q_SLOTS:
     void setHighQualityAntialiasing(bool highQualityAntialiasing);