QmlDesigner: add resetZoomLevel to ZoomAction

we always start from 100%

Change-Id: I7877fe36430e1a80dc5258ee4ed2ed68ffaadd81
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/formeditor/zoomaction.cpp

@@ -26,6 +26,7 @@
 #include "zoomaction.h"
 
 #include <QComboBox>
+#include <QAbstractItemView>
 
 namespace QmlDesigner {
 
@@ -55,6 +56,13 @@ void ZoomAction::zoomOut()
         emit indexChanged(m_currentComboBoxIndex + 1);
 }
 
+void ZoomAction::resetZoomLevel()
+{
+    m_zoomLevel = 1.0;
+    m_currentComboBoxIndex = 8;
+    emit reseted();
+}
+
 void ZoomAction::setZoomLevel(double zoomLevel)
 {
     m_zoomLevel = qBound(0.1, zoomLevel, 16.0);
@@ -90,7 +98,12 @@ QWidget *ZoomAction::createWidget(QWidget *parent)
         comboBox->setModel(m_comboBoxModel.data());
     }
 
-    comboBox->setCurrentIndex(8);
+    comboBox->setCurrentIndex(m_currentComboBoxIndex);
+    connect(this, &ZoomAction::reseted, comboBox, [this, comboBox]() {
+        blockSignals(true);
+        comboBox->setCurrentIndex(m_currentComboBoxIndex);
+        blockSignals(false);
+    });
     connect(comboBox, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
             this, &ZoomAction::emitZoomLevelChanged);
     connect(this, &ZoomAction::indexChanged, comboBox, &QComboBox::setCurrentIndex);

src/plugins/qmldesigner/components/formeditor/zoomaction.h

@@ -44,6 +44,7 @@ public:
 
     void zoomIn();
     void zoomOut();
+    void resetZoomLevel();
 
 protected:
     QWidget *createWidget(QWidget *parent);
@@ -51,6 +52,7 @@ protected:
 signals:
     void zoomLevelChanged(double zoom);
     void indexChanged(int);
+    void reseted();
 
 private:
     void emitZoomLevelChanged(int index);