1 QT GUI 類繼承簡介
布局管理器
輸出控件
輸入控件
按鈕
容器
2 按鈕示例
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QCheckBox>
#include <QLineEdit>
#include <QPushButton>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();
private slots:void setpass(bool flag);
private:QLineEdit *le;QCheckBox *ck;QPushButton *pb;};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{le = new QLineEdit;le->setEchoMode(QLineEdit::Password); //顯示模式為密碼ck = new QCheckBox("show Password");pb = new QPushButton("clear");QVBoxLayout *vbox = new QVBoxLayout;vbox->addWidget(le);vbox->addWidget(ck);vbox->addWidget(pb);this->setLayout(vbox);connect(pb, SIGNAL(clicked(bool)), le , SLOT(clear()));connect(ck, SIGNAL(clicked(bool)), this , SLOT(setpass(bool))); //點擊chechbox會顯示密碼，setpass(bool) 是接收信號的對象的槽函數，所以用this
}void Widget::setpass(bool flag)
{if(!flag)le->setEchoMode(QLineEdit::Password);elsele->setEchoMode(QLineEdit::Normal);
}Widget::~Widget()
{}
效果?
3 容器
3.1 Group box
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QGroupBox>
#include <QRadioButton>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();private:QGroupBox *gb;QRadioButton *r1, *r2, *r3;
};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{gb = new QGroupBox("choice", this);r1 = new QRadioButton("aaaa");r2 = new QRadioButton("bbbb");r3 = new QRadioButton("cccc");QVBoxLayout *vbox = new QVBoxLayout;vbox->addWidget(r1);vbox->addWidget(r2);vbox->addWidget(r3);gb->setLayout(vbox);QVBoxLayout *mainbox = new QVBoxLayout;mainbox->addWidget(gb);this->setLayout(mainbox);
}Widget::~Widget()
{}
效果
3.2?ScrollArea
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QLabel>
#include <QScrollArea>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();
private:QLabel *lb;QScrollArea *sa;
};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{//創建一個 QLabel 控件，并將一張名為 "1.jpg" 的圖片顯示在該 QLabel 上。lb = new QLabel(this);QPixmap pix("1.jpg"); //加載圖片lb->setPixmap(pix);sa = new QScrollArea(this);sa->setWidget(lb);QVBoxLayout *mainbox = new QVBoxLayout;mainbox->addWidget(sa);this->setLayout(mainbox);
}Widget::~Widget()
{}
?效果
3.3?TabWidget
管理多個標簽頁（Tab）的容器控件。它提供了一個便捷的方式來顯示和切換多個頁面
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QTabWidget>
#include <QTextEdit>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();
private:QTabWidget *tw;QTextEdit *te1, *te2, *te3;
};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{tw = new QTabWidget;te1 = new QTextEdit("11111111");te2 = new QTextEdit("112221111");te3 = new QTextEdit("11113333");tw->addTab(te1, "1.c");tw->addTab(te2, "2.c");tw->addTab(te3, "3.c");QVBoxLayout *mainbox = new QVBoxLayout;mainbox->addWidget(tw);this->setLayout(mainbox);
}Widget::~Widget()
{}
效果?
3.4?StackedWidget
堆疊窗口控件，可以用來管理多個子部件，但一次只能顯示其中一個子部件
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QStackedWidget>
#include <QTextEdit>
#include <QComboBox>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();private:QStackedWidget *sw;QTextEdit *te1, *te2, *te3;QComboBox *cb;};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{sw = new QStackedWidget;te1 = new QTextEdit("aaaa");te2 = new QTextEdit("aaadsfasdfasdfa");te3 = new QTextEdit("aaasdfaaa");sw->addWidget(te1);sw->addWidget(te2);sw->addWidget(te3);cb = new QComboBox;cb->addItem("1111");cb->addItem("2222");cb->addItem("3333");QVBoxLayout *mainbox = new QVBoxLayout;mainbox->addWidget(sw);mainbox->addWidget(cb);this->setLayout(mainbox);connect(cb, SIGNAL(activated(int)), sw, SLOT(setCurrentIndex(int)));
}Widget::~Widget()
{}
效果
3.5?Toolbox
折疊面板控件，通常用于顯示多個分組的相關內容
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include <QToolBox>
#include <QPushButton>class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = 0);~Widget();
private:QToolBox *tb;QPushButton *pb[3];
};#endif // WIDGET_H
#include "widget.h"
#include <QVBoxLayout>Widget::Widget(QWidget *parent): QWidget(parent)
{tb = new QToolBox;pb[0] = new QPushButton("aaa");pb[1] = new QPushButton("bbb");pb[2] = new QPushButton("ccc");tb->addItem(pb[0], "11111");tb->addItem(pb[1], "22222");tb->addItem(pb[2], "33333");QVBoxLayout *mainbox = new QVBoxLayout;mainbox->addWidget(tb);this->setLayout(mainbox);
}Widget::~Widget()
{}
效果（類似消息框）
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