Qt版面配置管理（QLayout）-4

範例1：增加下拉式選單（Combo Box）,堆疊排版

1. Helloworld.pro

TARGET = helloworld

SOURCES += main.cpp \

    layoutdlg.cpp

HEADERS  += \

    layoutdlg.h

FORMS    += dialog.ui

2. main.cpp

#include <QtGui>

#include <QtCore>

#include "layoutdlg.h"

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

{

    QApplication app(argc, argv);

    layoutdlg helloworld;

    helloworld.show();

    return app.exec();

}

3. layoutdlg.cpp

#include <QtGui>

#include "layoutdlg.h"

layoutdlg::layoutdlg(QDialog *parent)

 : QDialog(parent)

{

    QLabel *label1 = new QLabel("Lable1");

    QWidget *pageWidget1 = new QWidget;

    QVBoxLayout *layout1 = new QVBoxLayout();

    layout1->addWidget(label1);

    pageWidget1->setLayout(layout1);

    QLabel *label2 = new QLabel("Lable2");

    QWidget *pageWidget2 = new QWidget;

    QVBoxLayout *layout2 = new QVBoxLayout();

    layout2->addWidget(label2);

    pageWidget2->setLayout(layout2);

    QStackedLayout *stackedLayout = new QStackedLayout;

    stackedLayout->addWidget(pageWidget1);

    stackedLayout->addWidget(pageWidget2);

    QComboBox *pageComboBox = new QComboBox;

    pageComboBox->addItem(tr("Set Lable1"));

    pageComboBox->addItem(tr("Set Lable2"));

    connect(pageComboBox, SIGNAL(activated(int)),

            stackedLayout, SLOT(setCurrentIndex(int)));

    QVBoxLayout *mainLayout = new QVBoxLayout;

    mainLayout->addWidget(pageComboBox);

    mainLayout->addLayout(stackedLayout);

    setLayout(mainLayout);

}

4. layoutdlg.h

#ifndef LAYOUTDLG_H

#define LAYOUTDLG_H

#include <QDialog>

class QPushButton;

class layoutdlg  :  public QDialog

{

    Q_OBJECT

public:

    layoutdlg(QDialog *parent = 0);

};

#endif // LAYOUTDLG_H

顯示結果：