如何在QT中创建具有多个属性的按钮？

Question

我想创建一个具有以下属性的按钮

1. 半透明
2. 自动换行
3. 相对字体大小
4. 单击按钮时，按钮的文本颜色和背景颜色会发生变化

我可以用

单独实现

半透明且颜色变化

button->setFlat(true);
button->setStyleSheet(
            "QPushButton {"
            "color: blue;"
            "background-color: rgba(255, 255, 255, 90)"
            "}"
            "QPushButton:pressed {"
            "color: lime;"
            "background-color: rgba(255, 255, 255, 50)"
            "}"
            "QPushButton:flat {"
            "border: none; "
            "}"
            );

自动换行：

   QPushButton button;
    QHBoxLayout layout;
    button.setLayout(&layout);
    QLabel label("LOOOOOOOOOOOOOOOOOONGGGGGGGGGGG TEXXXXXXXXXT");
    label.setWordWrap(true);
    layout.addWidget(&label);
    button.show();

相对字体大小：

void MyButton::resizeEvent(QResizeEvent *event)
{
    int pixelsHeight = this->size().height()/2;
    if(pixelsHeight > 24) pixelsHeight = 24;
    if(pixelsHeight < 8) pixelsHeight = 8;

    m_font.setPixelSize(pixelsHeight);
    label->setFont(m_font);
}

我怎样才能同时实现所有目标？

Answer 1

我把所有你写的都放在子类中。你需要什么？

*的.h

#ifndef MYBUTTON_H
#define MYBUTTON_H

#include <QPushButton>
#include <QLabel>
#include <QHBoxLayout>
#include <QResizeEvent>


class MyButton : public QPushButton
{
    Q_OBJECT
public:
    explicit MyButton(QWidget *parent = 0);

signals:

public slots:

protected:
    void resizeEvent(QResizeEvent *event);

private:
    QLabel * label;
    QFont *m_font;

};

#endif // MYBUTTON_H

*。CPP

#include "mybutton.h"

MyButton::MyButton(QWidget *parent) :
    QPushButton(parent)
{
    setFlat(true);
    setStyleSheet(
                "QPushButton {"
                "color: blue;"
                "background-color: rgba(255, 255, 255, 90)"
                "}"
                "QPushButton:pressed {"
                "color: lime;"
                "background-color: rgba(255, 255, 255, 50)"
                "}"
                "QPushButton:flat {"
                "border: none; "
                "}"
                );

     QHBoxLayout *layout = new QHBoxLayout;
     setLayout(layout);
     label = new QLabel("LOOOOOOOOOOOOOOOOOONGGGGGGGGGGG TEXXXXXXXXXT",this);
     label->setWordWrap(true);
     layout->addWidget(label);

     m_font = new QFont();

}

void MyButton::resizeEvent(QResizeEvent *event)
{
    int pixelsHeight = this->size().height()/2;
    if(pixelsHeight > 24) pixelsHeight = 24;
    if(pixelsHeight < 8) pixelsHeight = 8;

    m_font->setPixelSize(pixelsHeight);
    label->setFont(*m_font);
}

的main.cpp

#include "mybutton.h"

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

    QApplication a(argc, argv);

    MyButton but;
    but.show();


    return a.exec();
}