Fix Maximize current Terminal (Keyboard vs Mouse)

It checks if the toggle is minimized to let it rearrange.
But Keyboard shortcut did not toggle the button.

BUG: 418498
FIXED-IN: 20.08.3

src/terminalDisplay/TerminalDisplay.cpp

@@ -1814,6 +1814,11 @@ void TerminalDisplay::getCharacterPosition(const QPoint& widgetPoint, int& line,
     line = qBound(0, (widgetPoint.y() - contentsRect().top() - _contentRect.top()) / _fontHeight, _usedLines - 1);
 }
 
+void TerminalDisplay::setExpandedMode(bool expand)
+{
+    _headerBar->setExpandedMode(expand);
+}
+
 void TerminalDisplay::updateLineProperties()
 {
     if (_screenWindow.isNull()) {

src/terminalDisplay/TerminalDisplay.h

@@ -376,6 +376,9 @@ public:
     // a character which left edge is closest to the point.
     void getCharacterPosition(const QPoint &widgetPoint, int &line, int &column, bool edge) const;
 
+    // toggle the header bar Minimize/Maximize button.
+    void setExpandedMode(bool expand);
+
     friend class TerminalPainter;
     friend class TerminalScrollBar;
 

src/widgets/TerminalHeaderBar.cpp

@@ -185,6 +185,13 @@ void TerminalHeaderBar::updateSpecialState(ViewProperties *item)
     }
 }
 
+void TerminalHeaderBar::setExpandedMode(bool expand)
+{
+    if (m_toggleExpandedMode->isChecked() != expand) {
+        m_toggleExpandedMode->setChecked(expand);
+    }
+}
+
 void TerminalHeaderBar::paintEvent(QPaintEvent *paintEvent)
 {
     /* Try to get the widget that's 10px above this one.

src/widgets/TerminalHeaderBar.h

@@ -44,6 +44,7 @@ public:
     QSize minimumSizeHint() const override;
     void applyVisibilitySettings();
     QSplitter *getTopLevelSplitter();
+    void setExpandedMode(bool expand);
 
 public Q_SLOTS:
     void setFocusIndicatorState(bool focused);

src/widgets/ViewSplitter.cpp

@@ -270,6 +270,7 @@ void ViewSplitter::handleMinimizeMaximize(bool maximize)
 {
     auto topLevelSplitter = getToplevelSplitter();
     auto currentTerminalDisplay = topLevelSplitter->activeTerminalDisplay();
+    currentTerminalDisplay->setExpandedMode(maximize);
     if (maximize) {
         for (int i = 0, end = topLevelSplitter->count(); i < end; i++) {
             auto widgetAt = topLevelSplitter->widget(i);