下拉选项单--QComboBox和ComboBox

下拉菜单可通过两种方式来实现

1、通过QComboBox调用addItem实现添加下拉选项

#include 
#include 
#include 
#include 

int main(int argc, char *argv[])
{

    QApplication app(argc, argv);
    QWidget * window = new QWidget;
    window->setWindowTitle("Hybird");
    window->resize(240,320);

    QComboBox * combox = new QComboBox;
    combox->addItem("Apple");
    combox->addItem("Banana");
    combox->addItem("Pear");

    QComboBox *comboxIcon = new QComboBox;
    comboxIcon->addItem(QIcon(":/images/Apple.jpg"),"Apple");
    comboxIcon->addItem(QIcon(":/images/Banana.jpg"),"Banana");
    QVBoxLayout * layout = new QVBoxLayout;
    layout->addWidget(combox);
    layout->addWidget(comboxIcon);
    window->setLayout(layout);
    window->show();
    return app.exec();
}

需要注意的是：添加图片时，要手动将图片添加到.qrc文件中。

2、在QML的ComboBox空间实现下拉控件的实现

     简单实现下拉菜单其中下拉选项包含Banana、Apple、Pear选项

··

    ComboBox{

        currentIndex: 1

        width: 100

        height: 30

        model: ["Banana","Apple","pear"]

    }

··

下面的这个例子，可以实现基本的下拉选项，而且我们可以改变下拉框的颜色以及外边框的颜色，相关代码示例如下：

··

    ComboBox{

        currentIndex:  1

        width: 100

        height: 30

        style:ComboBoxStyle{

            background: Item {

                id: combobak

                Rectangle{

                    anchors.fill: parent

                    color: "Gray"

                    border.width: 2

                    border.color: "Green"

                }

                Image {

                    id: comboimage

                    anchors.verticalCenter: parent.verticalCenter

                    anchors.right: parent.right

                    anchors.rightMargin: dropDownButtonWidth / 2

                    source: "/images/arrow-down.png"

                }

            }

        }

        model: ListModel{

            ListElement{name:"Banana"}

            ListElement{name:"Apple"}

        }

    }

··