• 日期: 2027-08-28
  • 标签: 常规

#include

SwitchForm::SwitchForm(QWidget *parent) : QWidget(parent) { number = 0; m_space = 2; m_radius = 5; m_checked = false; m_showText = true; m_showText = false; m_animation = true;

m_bgColorOn = QColor(102, 205, 170); // 设置按钮内部颜色
m_bgColorOff = QColor(190, 190, 190);

m_sliderColorOn = QColor(255, 255, 255);
m_sliderColorOff = QColor(255, 255, 255);

m_textColor = QColor(255, 255, 255);

m_textOn = '开启'; // 设置按钮中的文字
m_textOff = '关闭';

m_step = 0;
m_startX = 0;
m_endX = 0;

m_timer = new QTimer(this);
m_timer->setInterval(30);
connect(m_timer, SIGNAL(timeout()), this, SLOT(updateValue()));

}

void SwitchForm::drawBackGround(QPainter *painter) { painter->save(); painter->setPen(Qt::NoPen);

QColor bgColor = m_checked ? m_bgColorOn : m_bgColorOff;
if (isEnabled()) {
    bgColor.setAlpha(150);
}

painter->setBrush(bgColor);

QRect rect(0, 0, width(), height());
int side = qMin(width(), height());

// 左侧半圆
QPainterPath path1;
path1.addEllipse(rect.x(), rect.y(), side, side);

// 右侧半圆
QPainterPath path2;
path2.addEllipse(rect.width() - side, rect.y(), side, side);

// 中间的矩形
QPainterPath path3;
path3.addRect(rect.x() + side / 2, rect.y(), rect.width() - side, height());

QPainterPath path = path1 + path2 + path3;
painter->drawPath(path);

// 绘制文本

// 滑块半径
int sliderWidth = qMin(height(), width()) - m_space * 2 - 5;
if (m_checked) {
    QRect textRect(0, 0, width() - sliderWidth, height());
    painter->setPen(QPen(m_textColor));
    painter->drawText(textRect, Qt::AlignCenter, m_textOn);
} else {
    QRect textRect(sliderWidth, 0, width() - sliderWidth, height());
    painter->setPen(QPen(m_textColor));
    painter->drawText(textRect, Qt::AlignCenter, m_textOff);
}

painter->restore();

}

void SwitchForm::drawSlider(QPainter *painter) { painter->save(); painter->setPen(Qt::NoPen);

QColor color = m_checked ? m_sliderColorOn : m_sliderColorOff;

painter->setBrush(QBrush(color));

int sliderWidth = qMin(width(), height()) - m_space * 2;
QRect rect(m_space + m_startX, m_space, sliderWidth, sliderWidth);
painter->drawEllipse(rect);

painter->restore();

}

void SwitchForm::paintEvent(QPaintEvent *ev) { // 启用反锯齿 QPainter painter(this); painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);

// 绘制背景
drawBackGround(&painter);

// 绘制滑块
drawSlider(&painter);

}

void SwitchForm::mousePressEvent(QMouseEvent *ev) { Q_UNUSED(ev)

m_checked = !m_checked;
emit statusChanged(m_checked);

// 计算步长
m_step = width() / 10;

// 计算滑块 X 轴终点坐标
if (m_checked) {
    m_endX = width() - height();
} else {
    m_endX = 0;
}

// 判断是否使用动画
if (m_animation) {
    m_timer->start();
} else {
    m_startX = m_endX;
    update();
}

}

void SwitchForm::updateValue() { if (m_checked) { if (m_startX < m_endX) { m_startX += m_step; } else { m_startX = m_endX; m_timer->stop(); } } else { if (m_startX > m_endX) { m_startX -= m_step; } else { m_startX = m_endX; m_timer->stop(); } }

update();

}

int SwitchForm::space() const { return m_space; }

bool SwitchForm::checked() const { return m_checked; }

bool SwitchForm::showText() const { return m_showText; }

bool SwitchForm::showCircel() const { return m_showCircle; }

bool SwitchForm::animation() const { return m_animation; }

QColor SwitchForm::bgColorOn() const { return m_bgColorOn; }

QColor SwitchForm::bgColorOff() const { return m_bgColorOff; }

QColor SwitchForm::sliderColorOn() const { return m_sliderColorOn; }

QColor SwitchForm::sliderColorOff() const { return m_sliderColorOff; }

QColor SwitchForm::textColor() const { return m_textColor; }

QString SwitchForm::textOn() const { return m_textOn; }

QString SwitchForm::textOff() const { return m_textOff; }

int SwitchForm::step() const { return m_step; }

int SwitchForm::startX() const { return m_startX; }

int SwitchForm::endX() const { return m_endX; }

void SwitchForm::setSpace(int space) { if (m_space != space) { m_space = space; update(); } }

void SwitchForm::setRadius(int radius) { if (m_radius != radius) { m_radius = radius; update(); } }

void SwitchForm::setChecked(bool checked) { if (m_checked != checked) { m_checked = checked; update(); } }

void SwitchForm::setShowText(bool show) { if (m_showText != show) { m_showText = show; update(); } }

void SwitchForm::setShowCircle(bool show) { if (m_showCircle != show) { m_showCircle = show; update(); } }

void SwitchForm::setAnimation(bool ok) { if (m_animation != ok) { m_animation = ok; update(); } }

void SwitchForm::setBgColorOn(const QColor &color) { if (m_bgColorOn != color) { m_bgColorOn = color; update(); } }

void SwitchForm::setBgColorOff(const QColor &color) { if (m_bgColorOff != color) { m_bgColorOff = color; update(); } }

void SwitchForm::setSliderColorOn(const QColor &color) { if (m_sliderColorOn != color) { m_sliderColorOn = color; update(); } }

void SwitchForm::setSliderColorOff(const QColor &color) { if (m_sliderColorOff != color) { m_sliderColorOff = color; update(); } }

void SwitchForm::setTextColor(const QColor &color) { if (m_textColor != color) { m_textColor = color; update(); } }

void SwitchForm::setTextOn(const QString &text) { if (m_textOn != text) { number++; m_textOn = text; update(); } }

void SwitchForm::setTextOff(const QString &text) { if (m_textOff != text) { m_textOff = text; update(); } }

bool SwitchForm::getStatus(int number) { if (number % 2) { return true; } else { return false; } }

#include extern int number; namespace Ui { class SwitchForm; }

class SwitchForm : public QWidget { Q_OBJECT

public: explicit SwitchForm(QWidget *parent = nullptr); bool getStatus(int number);

signals: void statusChanged(bool checked);

public slots: void updateValue();

private: void drawBackGround(QPainter *painter); void drawSlider(QPainter *painter);

protected: void paintEvent(QPaintEvent *ev); void mousePressEvent(QMouseEvent *ev);

private: int m_space; // 滑块距离边界距离 int m_radius; // 圆角角度

bool m_checked;             // 是否选中
bool m_showText;            // 是否显示文字
bool m_showCircle;          // 是否显示圆圈
bool m_animation;           // 是否使用动画

QColor m_bgColorOn;         // 打开时候的背景色
QColor m_bgColorOff;        // 关闭时候的背景色
QColor m_sliderColorOn;     // 打开时候滑块颜色
QColor m_sliderColorOff;    // 关闭时候滑块颜色
QColor m_textColor;         // 文字颜色

QString m_textOn;           // 打开时候的文字
QString m_textOff;          // 关闭时候的文字

QTimer *m_timer;            // 动画定时器
int m_step;             // 动画步长
int m_startX;           // 滑块开始 X 轴坐标
int m_endX;             // 滑块结束 X 轴坐标

public: int space() const; int radius() const; bool checked() const; bool showText() const; bool showCircel() const; bool animation() const;

QColor bgColorOn()          const;
QColor bgColorOff()         const;
QColor sliderColorOn()      const;
QColor sliderColorOff()     const;
QColor textColor()          const;

QString textOn()            const;
QString textOff()           const;

int step()                  const;
int startX()                const;
int endX()                  const;

public Q_SLOTS: void setSpace(int space); void setRadius(int radius); void setChecked(bool checked); void setShowText(bool show); void setShowCircle(bool show); void setAnimation(bool ok);

void setBgColorOn(const QColor &color);
void setBgColorOff(const QColor &color);
void setSliderColorOn(const QColor &color);
void setSliderColorOff(const QColor &color);
void setTextColor(const QColor &color);

void setTextOn(const QString &text);
void setTextOff(const QString &text);

};

#endif // SWITCHFORM_H 增加判断是开启还是关闭功能的函数，使调用开关组件的界面知道开关的状态内容：在 SwitchForm 类中增加了一个名为 getStatus 的公共函数，用于获取开关的状态。在该函数中，通过判断 number 的奇偶性来确定开关的状态，奇数表示开启，偶数表示关闭。在调用开关组件的界面中，可以通过调用 getStatus 函数来获取开关的状态。

Qt 自定义开关控件：SwitchForm 实现与优化

原文地址: https://www.cveoy.top/t/topic/fAlJ 著作权归作者所有。请勿转载和采集!

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