Basic QML Components

QtObject

http://doc.qt.io/qt-5/qml-qtqml-qtobject.html

• 同 C++ 的 OQbject
• Non-visual element
• Extremely lightweight type

Item

http://doc.qt.io/qt-5/qml-qtquick-item.html

• Base type for all visual items in Qt Quick
• Has no visual appearance
• 包含基本的參數：x, y, width, height, anchor, focus, visible, ...
• 可以用來把多個視覺物件組合成獨立的原件

Item {
    Image{}
    Text{}
}

Rectangle

http://doc.qt.io/qt-5/qml-qtquick-rectangle.html

• 有顏色的Item

Window

http://doc.qt.io/qt-5/qml-qtquick-window-window.html

• top-level window
• A Window can be declared inside an Item or inside another Window