Keep bineditor zoom in sync with global settings

The code is basically copied from TextEditorWidget.

Change-Id: I5a88814d59ee991be030b15840e1aff08f20a25b
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/bineditor/bineditorwidget.cpp

@@ -31,10 +31,12 @@
 #include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/editormanager/ieditor.h>
 
+#include <texteditor/behaviorsettings.h>
 #include <texteditor/fontsettings.h>
 #include <texteditor/texteditorconstants.h>
 #include <texteditor/texteditorsettings.h>
 
+#include <utils/fadingindicator.h>
 #include <utils/fileutils.h>
 #include <utils/qtcassert.h>
 
@@ -516,11 +518,16 @@ void BinEditorWidget::changeEvent(QEvent *e)
 void BinEditorWidget::wheelEvent(QWheelEvent *e)
 {
     if (e->modifiers() & Qt::ControlModifier) {
-        const int delta = e->delta();
-        if (delta < 0)
-            zoomOut();
-        else if (delta > 0)
-            zoomIn();
+        if (!TextEditor::TextEditorSettings::behaviorSettings().m_scrollWheelZooming) {
+            // When the setting is disabled globally,
+            // we have to skip calling QAbstractScrollArea::wheelEvent()
+            // that changes zoom in it.
+            return;
+        }
+
+        const float delta = e->angleDelta().y() / 120.f;
+        if (delta != 0)
+            zoomF(delta);
         return;
     }
     QAbstractScrollArea::wheelEvent(e);
@@ -1419,19 +1426,25 @@ void BinEditorWidget::keyPressEvent(QKeyEvent *e)
     e->accept();
 }
 
-void BinEditorWidget::zoomIn(int range)
+static void showZoomIndicator(QWidget *editor, const int newZoom)
 {
-    QFont f = font();
-    const int newSize = f.pointSize() + range;
-    if (newSize <= 0)
-        return;
-    f.setPointSize(newSize);
-    setFont(f);
+    Utils::FadingIndicator::showText(editor,
+                                     QCoreApplication::translate("BinEditorWidget::TextEditorWidget",
+                                                                 "Zoom: %1%").arg(newZoom),
+                                     Utils::FadingIndicator::SmallText);
 }
 
-void BinEditorWidget::zoomOut(int range)
+void BinEditorWidget::zoomF(float delta)
 {
-    zoomIn(-range);
+    float step = 10.f * delta;
+    // Ensure we always zoom a minimal step in-case the resolution is more than 16x
+    if (step > 0 && step < 1)
+        step = 1;
+    else if (step < 0 && step > -1)
+        step = -1;
+
+    const int newZoom = TextEditor::TextEditorSettings::instance()->increaseFontZoom(int(step));
+    showZoomIndicator(this, newZoom);
 }
 
 void BinEditorWidget::copy(bool raw)

src/plugins/bineditor/bineditorwidget.h

@@ -78,8 +78,7 @@ public:
     void updateContents();
     bool save(QString *errorString, const QString &oldFileName, const QString &newFileName);
 
-    void zoomIn(int range = 1);
-    void zoomOut(int range = 1);
+    void zoomF(float delta);
 
     enum MoveMode {
         MoveAnchor,