Index: app/mainwindow.h
===================================================================
--- app/mainwindow.h
+++ app/mainwindow.h
@@ -54,6 +54,8 @@
     Q_OBJECT
     Q_CLASSINFO("D-Bus Interface", "org.kde.yakuake")
 
+    friend class TitleBar;
+
     public:
         explicit MainWindow(QWidget* parent = 0);
         ~MainWindow();
Index: app/titlebar.h
===================================================================
--- app/titlebar.h
+++ app/titlebar.h
@@ -24,6 +24,7 @@
 
 
 #include <QWidget>
+#include <QMouseEvent>
 
 
 class MainWindow;
@@ -55,6 +56,7 @@
     protected:
         void resizeEvent(QResizeEvent*) override;
         void paintEvent(QPaintEvent*) override;
+        void mouseMoveEvent(QMouseEvent*) override;
 
 
     private:
Index: app/titlebar.cpp
===================================================================
--- app/titlebar.cpp
+++ app/titlebar.cpp
@@ -138,6 +138,27 @@
     painter.end();
 }
 
+void TitleBar::mouseMoveEvent(QMouseEvent* event)
+{
+    if (event->buttons() == Qt::LeftButton) {
+        MainWindow* parent = (MainWindow*)this->parent();
+
+        int maxHeight = parent->getDesktopGeometry().height();
+        int newHeight = event->globalY() / (maxHeight / 100);
+
+        if (newHeight > 100) {
+            newHeight = 100;
+        }
+        if (newHeight < 10) {
+            newHeight = 10;
+        }
+
+        parent->setWindowHeight(newHeight);
+    } else {
+        QWidget::mouseMoveEvent(event);
+    }
+}
+
 void TitleBar::updateMask()
 {
     const QPixmap& leftCornerImage = m_skin->titleBarLeftCornerImage();