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125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
#include "verifycodewidget.h"
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#include <QPainter>
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#include <QPen>
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#include <QFont>
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#include <QChar>
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#include <QPaintEvent>
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#include <QMouseEvent>
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#include <QColor>
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#include <QString>
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#include "model/data.h"
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VerifyCodeWidget::VerifyCodeWidget(QWidget *parent)
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: QWidget(parent),
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randomGenerator(model::getTime())
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{
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verifyCode = generateVerifyCode();
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}
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QString VerifyCodeWidget::generateVerifyCode()
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{
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QString code;
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for (int i = 0; i < 4; i++) {
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//每次循环生成一个字符
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int init = 'A';
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init += randomGenerator.generate() % 26;
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code += static_cast<QChar>(init);
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}
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return code;
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}
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void VerifyCodeWidget::refreshVerifyCode()
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{
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verifyCode = generateVerifyCode();
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// 通过 update 就可以起到 "刷新界面" , 本身就是触发 paintEvent
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this->update();
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}
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bool VerifyCodeWidget::checkVerifyCode(const QString& verifyCode)
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{
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//此处比较验证码需要忽略大小写
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return this->verifyCode.compare(verifyCode, Qt::CaseInsensitive) == 0;
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}
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void VerifyCodeWidget::paintEvent(QPaintEvent* event)
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{
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(void)event;
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const int width = 180;
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const int height = 80;
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QPainter painter(this);
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QPen pen;
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QFont font("楷体", 25, QFont::Bold, true);
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painter.setFont(font);
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// 画点: 添加随机噪点
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for (int i = 0; i < 100; i++)
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{
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pen = QPen(QColor(randomGenerator.generate() % 256, randomGenerator.generate() % 256, randomGenerator.generate() % 256));
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painter.setPen(pen);
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painter.drawPoint(randomGenerator.generate() % width, randomGenerator.generate() % height);
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}
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// 画线: 添加随机干扰线
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for (int i = 0; i < 5; i++)
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{
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pen = QPen(QColor(randomGenerator.generate() % 256, randomGenerator.generate() % 256, randomGenerator.generate() % 256));
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painter.setPen(pen);
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painter.drawLine(randomGenerator.generate() % width, randomGenerator.generate() % height,
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randomGenerator.generate() % width, randomGenerator.generate() % height);
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}
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// 绘制验证码
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for (int i = 0; i < verifyCode.size(); i++)
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{
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// 随机字体大小
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int fontSize = 13 + randomGenerator.generate() % 16; // 20~35
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QFont font("楷体", fontSize, QFont::Bold, true);
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painter.setFont(font);
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// 随机旋转角度（-30~30度）
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int angle = (randomGenerator.generate() % 61) - 30;
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// 随机颜色
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pen = QPen(QColor(randomGenerator.generate() % 255, randomGenerator.generate() % 255, randomGenerator.generate() % 255));
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painter.setPen(pen);
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// 保存当前状态
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painter.save();
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// 计算字符中心点
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int x = 5 + 22 * i;
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int y = 10;
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int w = 30, h = 30;
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QPoint center(x + w / 2, y + h / 2);
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// 平移到中心，旋转，再平移回去
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painter.translate(center);
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painter.rotate(angle);
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painter.translate(-center);
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// 绘制字符
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painter.drawText(x, y, w, h, Qt::AlignCenter, QString(verifyCode[i]));
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// 恢复状态
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painter.restore();
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}
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// 绘制验证码
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/*for (int i = 0; i < verifyCode.size(); i++)
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{
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pen = QPen(QColor(randomGenerator.generate() % 255, randomGenerator.generate() % 255, randomGenerator.generate() % 255));
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painter.setPen(pen);
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painter.drawText(5 + 22 * i, randomGenerator.generate() % 10, 30, 30, Qt::AlignCenter, QString(verifyCode[i]));
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}*/
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}
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void VerifyCodeWidget::mousePressEvent(QMouseEvent* event)
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{
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(void)event;
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this->refreshVerifyCode();
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}
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