Qt之对话框设计——可扩展对话框

利用setSizeConstraint(QLayout::SetFixedSize)方法使对话框尺寸保持相对固定（有控件决定），不能经过拖动改变大小。

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extension.h

#ifndef EXTENSION_H
#define EXTENSION_H

#include <QtGui/QDialog>
#include <QWidget>

class Extension : public QDialog
{
	Q_OBJECT

public:
	Extension(QWidget *parent = 0, Qt::WFlags flags = 0);
	~Extension();

	void createBaseInfo();
	void createDetaiInfo();

private:
	QWidget *baseWidget;
	QWidget *detaiWidget;

	public slots:
		void sl_Extension();
	
};

#endif // EXTENSION_H

extension.cpp

#include "extension.h"
#include <QVBoxLayout>
#include <QGridLayout>
#include <QLabel>
#include <QLineEdit>
#include <QComboBox>
#include <QPushButton>

Extension::Extension(QWidget *parent, Qt::WFlags flags)
	: QDialog(parent, flags)
{
	setWindowTitle(tr("Extension Dialog"));

	createBaseInfo();
	createDetaiInfo();

	QVBoxLayout *mainLayout = new QVBoxLayout(this);
	mainLayout->addWidget(baseWidget);
	mainLayout->addWidget(detaiWidget);
	mainLayout->setSpacing(10);
	mainLayout->setSizeConstraint(QLayout::SetFixedSize);
}

Extension::~Extension()
{

}

void Extension::createBaseInfo()
{
	baseWidget = new QWidget;

	QLabel *labName = new QLabel(tr("Name:"));
	QLabel *labSex = new QLabel(tr("Sex:"));
	QLineEdit *edtName = new QLineEdit;
	QComboBox *cbbSex = new QComboBox;
	cbbSex->insertItem(0,tr("male"));
	cbbSex->insertItem(1,tr("female"));
	QPushButton *btnOk = new QPushButton(tr("Ok"));
	QPushButton *btnDetai = new QPushButton(tr("Detai"));
	connect(btnDetai,SIGNAL(clicked()),this,SLOT(sl_Extension()));

	QGridLayout *baseLayout = new QGridLayout(baseWidget);
	baseLayout->addWidget(labName,0,0);
	baseLayout->addWidget(edtName,0,1);
	baseLayout->addWidget(btnOk,0,2);
	baseLayout->addWidget(labSex,1,0);
	baseLayout->addWidget(cbbSex,1,1);
	baseLayout->addWidget(btnDetai,1,2);
	baseLayout->setMargin(10);
	baseLayout->setSpacing(10);

}

void Extension::createDetaiInfo()
{
	detaiWidget = new QWidget;

	QLabel *labAge = new QLabel(tr("Age:"));
	QLabel *labDepartment = new QLabel(tr("Department:"));
	QLabel *labEmail = new QLabel(tr("Email:"));
	QLineEdit *edtAge = new QLineEdit;
	QComboBox *cbbDepartment = new QComboBox;
	cbbDepartment->insertItem(0,tr("Department 1"));
	cbbDepartment->insertItem(1,tr("Department 2"));
	cbbDepartment->insertItem(2,tr("Department 3"));
	QLineEdit *edtEmail = new QLineEdit;

	QGridLayout *detaiLayout = new QGridLayout(detaiWidget);
	detaiLayout->addWidget(labAge,0,0);
	detaiLayout->addWidget(labDepartment,1,0);
	detaiLayout->addWidget(labEmail,2,0);
	detaiLayout->addWidget(edtAge,0,1);
	detaiLayout->addWidget(cbbDepartment,1,1);
	detaiLayout->addWidget(edtEmail,2,1);
	detaiLayout->setMargin(10);
	detaiLayout->setSpacing(10);

	detaiWidget->hide();
}

void Extension::sl_Extension()
{
	if (detaiWidget->isHidden())
	{
		detaiWidget->show();
	}
	else
	{
		detaiWidget->hide();
	}
}

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