MyWidget.h

05Controls.pro文件的內容

MyWidget.cpp

#include "MyWidget.h"

#include <QApplication>

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#include <QLabel>???????? // disply static text, or image

#include <QPushButton>

#include <QLineEdit>????? // single line

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#include <QComboBox>????? //下拉選

#include <QCheckBox>????? //復選框

#include <QRadioButton>?? //單選按鈕

#include <QTextEdit>????? // multi lines, rich text

#include <QTextBrowser>?? // readonly textedit

#include <QGroupBox>

#include <QSlider>??????? // 模擬方式顯示數值

#include <QSpinBox>?????? // 數字

#include <QDateEdit>

#include <QTimeEdit>

#include <QDateTimeEdit>

#include <QTabWidget>???? // 不介紹,不算控件

#include <QCompleter>

#include <QHBoxLayout>??? //布局控件

#include <QDebug>???????? //這里用于測試用

#include <QPixmap>

#include <QVBoxLayout>

#include <QLCDNumber>

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MyWidget::MyWidget(QWidget *parent) :

??? QWidget(parent)

{

??? QVBoxLayout* lay = new QVBoxLayout(this);

??? QLabel* label;

??? QComboBox* combo;

??? QPushButton* button;

??? QRadioButton* radio;

??? QTextEdit* edit;

??? QGroupBox* group;

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??? //說明可以通過編寫樣式的方式修改GUI中字體的樣式

??? lay->addWidget(label = new QLabel("<a href=www.baidu.com>百度</a>"));

??? //通過下面一句在lable上添加一個圖片,當加了下面一句之后，上面的baidu字就會被覆蓋

??? //label->setPixmap(QPixmap("../aaa.png"));

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??? //當選中了lable之后會，輸出字符串

??? connect(label, &QLabel::linkActivated, [](QString str){

??????? qDebug() << str;

??? });

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??? lay->addWidget(button = new QPushButton("Button"));

??? //為button添加樣式

??? button->setStyleSheet("QPushButton {font:bold 16px; color:red; padding:5px}");

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??? lay->addWidget(radio = new QRadioButton("Radio"));

??? radio->setStyleSheet("QRadioButton {font:bold 16px; color:red; padding:5px}");

??? //為單選按鈕添加事件，true或者false

??? connect(radio, &QRadioButton::clicked, [](bool v){

??????? qDebug() << v;

??? });

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??? lay->addWidget(new QCheckBox("check box"));

??? //添加下拉選

??? lay->addWidget(combo = new QComboBox());

??? combo->addItem("Select item1");

??? combo->addItem("Select item2");

??? //設置下拉選可以被編輯

??? combo->setEditable(true);

??? //當下拉選selectChanged之后，用信號槽進行處理

??? connect(combo, SIGNAL(currentIndexChanged(QString)), this, SLOT(slotComboBoxIndexChanged(QString)));

??? combo->setCompleter(new QCompleter(combo->model()));

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??? //說明多行文本框之中可以使用html標簽頁面

??? lay->addWidget(edit = new QTextEdit);

??? edit->setText("<table border=1><tr><th>head1</th><th>head2</th></tr>"

????????????????? "<tr><td>value1</td><td>value2</td></tr>"

????????????????? "<tr><td>value3</td><td>value4</td></tr>"

????????????????? "</table><br>"

????????????????? "<img src=../aaa.png></img>");

??? _edit = edit;

??? connect(edit, &QTextEdit::textChanged, [&](){

???? //?? QTextEdit* edit = (QTextEdit*)this->sender();

??????? qDebug() << _edit->toPlainText();

??? });

??? //設置豎直方向上有水平滾動條

??? edit->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);

??? //設置水平方向上沒有滾動條

??? edit->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);

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??? lay->addWidget(group = new QGroupBox("Some items"));

??? QHBoxLayout* hBoxLay;

??? group->setLayout(hBoxLay = new QHBoxLayout);

??? hBoxLay->addWidget(new QPushButton("aaaa"));

??? hBoxLay->addWidget(new QPushButton("aaaa"));

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??? QSlider* slider;

??? QSpinBox* spinBox;

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??? lay->addWidget(slider = new QSlider(Qt::Horizontal));

??? slider->setMaximum(100);

??? slider->setMinimum(0);

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??? lay->addWidget(spinBox = new QSpinBox);

??? spinBox->setMaximum(100);

??? spinBox->setMinimum(0);

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??? connect(slider, SIGNAL(valueChanged(int)), spinBox, SLOT(setValue(int)));

??? connect(spinBox, SIGNAL(valueChanged(int)), slider, SLOT(setValue(int)));

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??? lay->addWidget(new QDateTimeEdit);

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??? //設置LCD樣式的顯示狀態

??? QLCDNumber* lcd;

??? lay->addWidget(lcd = new QLCDNumber(10));

??? lcd->display(12345);

??? lcd->setMode(QLCDNumber::Hex);

??? lcd->setSegmentStyle(QLCDNumber::Outline);

}

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void MyWidget::slotComboBoxIndexChanged(const QString &str)

{

??? qDebug() << "slotComboBoxIndexChanged" << str;

}

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int main(int argc, char** argv)

{

??? QApplication app(argc, argv);

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??? MyWidget w;

??? w.show();

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??? return app.exec();

}

運行結果：