Qt之基本布局管理器

#ifndef DIALOG_H

#define DIALOG_H

#include <QtGui/QDialog>

#include <QLabel>

#include <QLineEdit>

#include <QTextEdit>

#include <QComboBox>

#include <QGridLayout>

#include <QPushButton>

class Dialog : public QDialog

{

Q_OBJECT

public:

Dialog(QWidget *parent = 0);

~Dialog();

QLabel *label1;

QLabel *label2;

QLabel *label3;

QLabel *label4;

QLabel *label5;

QLabel *label6;

QLabel *label7;

QLabel *labelOther;

QLabel *labelIcon;

QLineEdit *lineEditUser;

QLineEdit *lineEditName;

QComboBox *comboBoxSex;

QTextEdit *textEditDepartment;

QLineEdit *lineEditAge;

QTextEdit *textEditDisc;

QPushButton *pushButtonIcon;

QPushButton *pushButtonOK;

QPushButton *pushButtonExit;
};


#endif // DIALOG_H

#include "dialog.h"

Dialog::Dialog(QWidget *parent)

: QDialog(parent)

{

setWindowTitle(tr("User Name"));

label1 = new QLabel(tr("User Name"));

label2 = new QLabel(tr("Name"));

label3 = new QLabel(tr("Sex"));

label4 = new QLabel(tr("Department"));

label5 = new QLabel(tr("Age"));

labelOther = new QLabel(tr("Remark"));

//label继承自QFrame,可以设置凹陷或阴影状态，用|即可

labelOther->setFrameStyle(QFrame::Panel | QFrame::Sunken);

lineEditUser = new QLineEdit;

lineEditName = new QLineEdit;

//QComBox的使用，insertItem插入项

comboBoxSex = new QComboBox;

comboBoxSex->insertItem(0,tr("Female"));

comboBoxSex->insertItem(1,tr("Male"));

textEditDepartment = new QTextEdit();

lineEditAge = new QLineEdit;

//左半边子布局网格布局

QGridLayout *leftLayout = new QGridLayout();

//只有两列，所以定义两个变量labelCol表示第0列，contentCol表示第一列

int labelCol=0;

int contentCol=1;

leftLayout->addWidget(label1,0,labelCol);

leftLayout->addWidget(lineEditUser,0,contentCol);

leftLayout->addWidget(label2,1,labelCol);

leftLayout->addWidget(lineEditName,1,contentCol);

leftLayout->addWidget(label3,2,labelCol);

leftLayout->addWidget(comboBoxSex,2,contentCol);

//注意这里的部门标签，设置为顶部对齐方式，可以和textEdit对齐，看运行效果

leftLayout->addWidget(label4,3,labelCol,Qt::AlignTop);

leftLayout->addWidget(textEditDepartment,3,contentCol);

leftLayout->addWidget(label5,4,labelCol);

leftLayout->addWidget(lineEditAge,4,contentCol);

//labelOther坐标(5,0),占了一行布局中两列的位置，看运行效果

leftLayout->addWidget(labelOther,5,labelCol,1,2);

//setColumnStretch设置第0列在布局管理中所占比例为1，第1列在布局管理中所占比例为3，

//即使对话框大小改变了，两列之间的宽度比依然保持不变

leftLayout->setColumnStretch(0,1);

leftLayout->setColumnStretch(1,3);

label7  = new QLabel(tr("Head"));

labelIcon = new QLabel();

QPixmap icon("man.png");

labelIcon->resize(icon.width(),icon.height());

labelIcon->setPixmap(icon);

pushButtonIcon = new QPushButton;

pushButtonIcon->setText(tr("Change"));

QHBoxLayout *hlayout = new QHBoxLayout;

hlayout->setSpacing(20);

hlayout->addWidget(label7);

hlayout->addWidget(labelIcon);

hlayout->addWidget(pushButtonIcon);

label6 = new QLabel(tr("Individual"));

textEditDisc = new QTextEdit;

//右半部分的竖直对齐

QVBoxLayout *rightLayout = new QVBoxLayout;

//设置控件到边框的距离

rightLayout->setMargin(10);

rightLayout->addLayout(hlayout);

rightLayout->addWidget(label6);

rightLayout->addWidget(textEditDisc);

//底布局，两个按钮

pushButtonOK = new QPushButton(tr("OK"));

pushButtonExit = new QPushButton(tr("Cancel"));

QHBoxLayout *bottomLayout = new QHBoxLayout;

//addStretch在按钮之前插入一个占位符，使两个按钮能始终靠右对齐，

//并且在整个对话框的大小发生改变时，保证按钮的大小不发生变化

bottomLayout->addStretch();

bottomLayout->addWidget(pushButtonOK);

bottomLayout->addWidget(pushButtonExit);

//顶级布局，布局管理的对象会默认被布局管理所在控件管理，即默认指定父窗口

QGridLayout *mainLayout = new QGridLayout(this);

mainLayout->setMargin(15);

mainLayout->setSpacing(10);

mainLayout->addLayout(leftLayout,0,0);

mainLayout->addLayout(rightLayout,0,1);

mainLayout->addLayout(bottomLayout,1,0,1,2);

//setSizeConstraint(Qlayout::setFixedSize)设定对话框的控件总是最优化显示，

//并且用户无法改变对话框的大小，所谓最优化显示，即控件都按其sizeHint()

//的大小显示，sizeHint表示布局管理器中默认尺寸

mainLayout->setSizeConstraint(QLayout::SetFixedSize);

}

Dialog::~Dialog()

{

}