Add full window state saving

Saving and restoring of window sizes and states (normal
and maximized) has been added, as well as the position of internal
window elements, including toolbars.

Fixes #69

Author: raspopov

omodsim/mainwindow.cpp

@@ -1840,13 +1840,7 @@ void MainWindow::loadSettings()
 
     QSettings m(filepath, QSettings::IniFormat, this);
 
-    const auto geometry = m.value("WindowGeometry", this->geometry()).toRect();
-    setGeometry(geometry);
-
-    const bool isMaximized = m.value("WindowMaximized").toBool();
-    if(isMaximized) {
-        showMaximized();
-    }
+    restoreGeometry(m.value("WindowGeometry").toByteArray());
 
     const auto viewMode = (QMdiArea::ViewMode)qBound(0, m.value("ViewMode", QMdiArea::SubWindowView).toInt(), 1);
     ui->mdiArea->setViewMode(viewMode);
@@ -1901,6 +1895,8 @@ void MainWindow::loadSettings()
             }
         }
     }
+
+    restoreState(m.value("WindowState").toByteArray());
 }
 
 ///
@@ -1934,8 +1930,8 @@ void MainWindow::saveSettings()
     m.clear();
     m.sync();
 
-    m.setValue("WindowMaximized", isMaximized());
-    m.setValue("WindowGeometry", isMaximized()? normalGeometry() : geometry());
+    m.setValue("WindowGeometry", saveGeometry());
+    m.setValue("WindowState", saveState());
 
     const auto frm = currentMdiChild();
     if(frm) m.setValue("ActiveWindow", frm->windowTitle());