Use a custom tool bar.

We don't want a titlebar and we want a custom toolbar instead.

kiwix-desktop.pro

@@ -37,7 +37,8 @@ SOURCES += \
     blobbuffer.cpp \
     kiwixrequestinterceptor.cpp \
     kiwixwebview.cpp \
-    library.cpp
+    library.cpp \
+    topwidget.cpp
 
 HEADERS += \
         mainwindow.h \
@@ -46,7 +47,8 @@ HEADERS += \
     blobbuffer.h \
     kiwixrequestinterceptor.h \
     kiwixwebview.h \
-    library.h
+    library.h \
+    topwidget.h
 
 FORMS += \
         mainwindow.ui

mainwindow.cpp

@@ -10,6 +10,7 @@ MainWindow::MainWindow(QWidget *parent) :
 {
     ui->setupUi(this);
     ui->tabWidget->tabBar()->setExpanding(false);
+    setWindowFlags(Qt::Window | Qt::CustomizeWindowHint);// | Qt::WindowCloseButtonHint);// | Qt::WindowTitleHint);
 }
 
 MainWindow::~MainWindow()

mainwindow.ui

@@ -13,6 +13,9 @@
   <property name="windowTitle">
    <string>MainWindow</string>
   </property>
+  <property name="unifiedTitleAndToolBarOnMac">
+   <bool>true</bool>
+  </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QVBoxLayout" name="verticalLayout_2">
     <item>
@@ -30,23 +33,7 @@
     </item>
    </layout>
   </widget>
-  <widget class="QMenuBar" name="menuBar">
-   <property name="geometry">
-    <rect>
-     <x>0</x>
-     <y>0</y>
-     <width>873</width>
-     <height>42</height>
-    </rect>
-   </property>
-   <widget class="QMenu" name="menuFichier">
-    <property name="title">
-     <string>Fichier</string>
-    </property>
-   </widget>
-   <addaction name="menuFichier"/>
-  </widget>
-  <widget class="QToolBar" name="mainToolBar">
+  <widget class="TopWidget" name="mainToolBar">
    <attribute name="toolBarArea">
     <enum>TopToolBarArea</enum>
    </attribute>
@@ -57,6 +44,13 @@
   <widget class="QStatusBar" name="statusBar"/>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
+ <customwidgets>
+  <customwidget>
+   <class>TopWidget</class>
+   <extends>QToolBar</extends>
+   <header>topwidget.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

topwidget.cpp

@@ -0,0 +1,55 @@
+#include "topwidget.h"
+#include "kiwixapp.h"
+
+#include <QMouseEvent>
+
+TopWidget::TopWidget(QWidget *parent) :
+    QToolBar(parent),
+    fullScreen(false)
+{
+    addAction(QIcon(":/icons/back.svg"), "back");
+    addAction(QIcon(":/icons/forward.svg"), "forward");
+    addSeparator();
+
+    addWidget(&searchEntry);
+
+    addSeparator();
+
+    addAction(QIcon(":/icons/minimize.svg"), "minimize", parent, SLOT(showMinimized()));
+    fullScreenAction = addAction(QIcon(":/icons/full-screen-enter.svg"), "fullscreen", this, SLOT(toggleFullScreen()));
+    normalScreenAction = addAction(QIcon(":/icons/full-screen-exit.svg"), "unfullscreen", this, SLOT(toggleFullScreen()));
+    normalScreenAction->setVisible(false);
+    addAction(QIcon(":/icons/close.svg"), "close", parent, SLOT(close()));
+    setMovable(false);
+}
+
+
+void TopWidget::toggleFullScreen() {
+    if (fullScreen)
+        parentWidget()->showNormal();
+    else
+        parentWidget()->showFullScreen();
+    fullScreen = !fullScreen;
+    fullScreenAction->setVisible(!fullScreen);
+    normalScreenAction->setVisible(fullScreen);
+}
+
+
+void TopWidget::mousePressEvent(QMouseEvent *event) {
+    if(event->button() != Qt::LeftButton)
+        return;
+
+    m_pCursor = event->globalPos() + frameGeometry().topLeft() - parentWidget()->frameGeometry().topLeft();
+    timestamp = event->timestamp();
+    event->accept();
+}
+
+void TopWidget::mouseMoveEvent(QMouseEvent *event) {
+    if(event->timestamp() <= timestamp)
+        return;
+
+    timestamp = event->timestamp();
+    auto delta = event->globalPos() - m_pCursor;
+    parentWidget()->move(delta);
+    event->accept();
+}

topwidget.h

@@ -0,0 +1,29 @@
+#ifndef TOPWIDGET_H
+#define TOPWIDGET_H
+
+#include <QToolBar>
+#include <QLineEdit>
+
+class TopWidget : public QToolBar
+{
+    Q_OBJECT
+public:
+    explicit TopWidget(QWidget *parent = nullptr);
+
+protected:
+    void mousePressEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+
+private:
+    QLineEdit searchEntry;
+    QAction* fullScreenAction;
+    QAction* normalScreenAction;
+    bool fullScreen;
+    QPoint m_pCursor;
+    ulong timestamp;
+
+protected slots:
+    void toggleFullScreen();
+};
+
+#endif // TOPWIDGET_H