I've created 2 QDockWidgets in MainWindow and added QWidget to each. I tried to color each of these widget with some color, but I find some space between size adjustment bar & color. What would be problem with this? Thank you.
Screenshot.jpg

Code:

MainWindow.h
Qt Code: 
  1. #ifndef MAINWINDOW_H
  2. #define MAINWINDOW_H
  3.  
  4. #include <QtGui/QMainWindow>
  5. #include <QWidget>
  6. #include <QHBoxLayout>
  7. #include <QFrame>
  8. #include <QPushButton>
  9. #include <QTabWidget>
  10. #include <QMenu>
  11. #include <QAction>
  12. #include <QDockWidget>
  13.  
  14. class MainWindow : public QMainWindow
  15. {
  16.     Q_OBJECT
  17.  
  18. public:
  19.     MainWindow(QWidget *parent = 0);
  20.     ~MainWindow();
  21.     void baseLayerSettings(void);
  22.  
  23. private:
  24.     QFrame *baseLayer;
  25.     QWidget *headerWidget, *footerWidget;
  26.     QPushButton *tab1_Button1, *tab1_Button2, *tab2_Button1, *tab1_Button3, *startMenu_button;
  27.     QMenu *startMenu;
  28.     QAction *menuAction;
  29.     QDockWidget *headerDock, *centerDock, *footerDock;
  30.     QHBoxLayout *footerLayout;
  31. };
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MainWindow.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2.  
  3. MainWindow::MainWindow(QWidget *parent)
  4.     : QMainWindow(parent)
  5. {
  6.     baseLayerSettings();
  7.     setCentralWidget(baseLayer);
  8.  
  9. }
  10.  
  11. MainWindow::~MainWindow()
  12. {
  13.  
  14. }
  15.  
  16. void MainWindow::baseLayerSettings(void)
  17. {
  18.     headerDock = new QDockWidget(this);
  19.     headerDock->setMinimumHeight(70);
  20.     headerDock->setFeatures(QDockWidget::NoDockWidgetFeatures);
  21.     baseLayer = new QFrame(this);
  22.     baseLayer->setStyleSheet("background-color: rgba(245, 250, 250, 255);");
  23.     footerDock = new QDockWidget(this);
  24.     footerDock->setMinimumHeight(70);
  25.     footerDock->setFeatures(QDockWidget::NoDockWidgetFeatures);
  26.  
  27.     this->setCentralWidget(baseLayer);
  28.     this->addDockWidget(Qt::TopDockWidgetArea, headerDock);
  29.     this->addDockWidget(Qt::BottomDockWidgetArea, footerDock);
  30.  
  31.     startMenu = new QMenu;
  32.     startMenu->setStyleSheet("QMenu::item {padding: 1px 10px 1px 20px; background-color: rgba(245, 250, 250, 255); height: 35px;};");
  33.     startMenu->setStyleSheet("QMenu::item:selected { background-color: rgba(109, 146, 155, 255); }");
  34.     startMenu->addAction("Break-Shift");
  35.     startMenu->addAction("Logout");
  36.     startMenu->addAction("Shutdown");
  37.  
  38.     startMenu_button = new QPushButton(tr("Menu"));
  39.     startMenu_button->setFixedSize(75, 40);
  40.     startMenu_button->setStyleSheet("border-style: outset; border-width: 1px; border-radius: 10px; border-color: blue; font-family: Monaco; font: 16px; color: rgba(4, 98, 148, 255); background-color: rgba(183, 175, 163, 255); min-width: 5em; min-height : 25px;");
  41.     startMenu_button->setStyleSheet("QPushButton:pressed { background-color: darkgray; font-family: Monaco; font-style: italic; color: rgba(29, 49, 122, 255)}");
  42.     startMenu_button->setMenu(startMenu);
  43.  
  44.     headerWidget = new QWidget;
  45.     headerWidget->setStyleSheet("background-color: rgba(172, 209, 233, 255);");
  46.     headerDock->setWidget(headerWidget);
  47.     footerDock->setWidget(startMenu_button);
  48.  
  49.     footerWidget = new QWidget;
  50.     footerWidget->setStyleSheet("background-color: rgba(232, 208, 169, 255);");
  51.     footerDock->setWidget(footerWidget);
  52.  
  53.     footerLayout = new QHBoxLayout;
  54.     footerWidget->setLayout(footerLayout);
  55.     footerLayout->addWidget(startMenu_button, 0, Qt::AlignLeft | Qt::AlignBottom);
  56.     startMenu_button->show();
  57.  
  58. }
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