154 lines
5.0 KiB
C++
154 lines
5.0 KiB
C++
/**
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* @author : 陈鲁勇
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* @date : 2017年04月
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* @version: 1.0
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* @note : 根据 Apache 许可证 2.0 版（以下简称“许可证”）授权;
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* 除非遵守本许可，否则您不能使用这个文件。
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* @remarks: 您可以获得该许可的副本：
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* http://www.apache.org/licenses/LICENSE-2.0
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* 除非适用法律需要或者书面同意，按本许可分发的软件
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* 要按“原样”分发，没有任何形式的，明确或隐含的担保条款。
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* 参见按照本许可控制许可权限及限制的特定语言的许可证。
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*
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* 你可以获得该代码的最新版本：
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*
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* https://git.oschina.net/Mr_ChenLuYong/screenshot
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*
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* 开源社区的所有人都期待与你的共同维护。
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*
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*
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* 如果你对这些代码还有不理解的地方可以通过最新的文章进行学习：
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*
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* 博客地址：http://blog.csdn.net/csnd_ayo
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*
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* 文章地址：http://blog.csdn.net/csnd_ayo/article/details/70197915
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*
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* 期待你提交Bug，欢迎Issues。
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*
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*/
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#include "oeamplifier.h"
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#include <QPixmap>
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#include <QPainter>
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#ifndef QT_NO_DEBUG
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#include <QDebug>
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#endif
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#include "oecommonhelper.h"
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OEAmplifier::OEAmplifier(std::shared_ptr<QPixmap> originPainting, QWidget *parent) :
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QWidget(parent), originPainting_(originPainting) {
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/// 设置成无边框对话框
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setWindowFlags(Qt::FramelessWindowHint|Qt::WindowSystemMenuHint);
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/// 开启鼠标实时追踪
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setMouseTracking(true);
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/// 设置默认大小
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sideLength_ = 122 * OECommonHelper::getWindowHeightMultiplyingPower();
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imageHeight_ = 90 * OECommonHelper::getWindowHeightMultiplyingPower();
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setFixedSize(sideLength_,sideLength_);
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/// 默认隐藏
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hide();
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}
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void OEAmplifier::onSizeChange(int w, int h) {
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screenSize_ = QSize(w, h);
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}
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void OEAmplifier::onPostionChange(int x, int y) {
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cursorPoint_ = QPoint(x, y);
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raise();
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int dest_x = x + 4;
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int dest_y = y + 26;
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/// 超出屏幕检测
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const QSize& parent_size = parentWidget()->size();
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if (dest_y + height() > parent_size.height()) {
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dest_y = y - 26 - height();
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}
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if (dest_x + width() > parent_size.width()) {
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dest_x = x - 4 - width();
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}
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move(dest_x, dest_y);
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}
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/// 绘制鼠标拖拽时选区矩形的右下顶点的放大图;
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void OEAmplifier::paintEvent(QPaintEvent *) {
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QPainter painter(this);
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/// 绘制背景
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painter.fillRect(rect(), QColor(0, 0, 0, 160));
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QPixmap endPointImage;
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/// 绘制放大图;
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const QSize& parent_size = parentWidget()->size();
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/**
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* @bug : 在屏幕边缘绘制放大图时会出现图片拉伸
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* 这里暂时做了边缘检测，若是屏幕边缘则不进行放大图的绘制，和QQ截图的采取方式是一致的。
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*
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* @marker: 颜色还是照样识别，但是局部放大的效果暂时禁用
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*
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* @note : 解决方法，可以发现边缘时，将不能放大的地方，不描绘，或填充黑色，以避免图片被非预期的拉伸问题。
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*/
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if ((cursorPoint_.x() + 15 < parent_size.width() && cursorPoint_.x() - 15 > 0)
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&& (cursorPoint_.y() + 11 < parent_size.height() && cursorPoint_.y() - 11 > 0)) {
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endPointImage = originPainting_->
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copy(QRect(cursorPoint_.x() - 15,
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cursorPoint_.y() - 11, 30, 22))
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.scaled(sideLength_, imageHeight_);
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painter.drawPixmap(0,0, endPointImage);
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}
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else {
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endPointImage = originPainting_->
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copy(QRect(cursorPoint_.x() - 15,
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cursorPoint_.y() - 11, 30, 22));
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}
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/// 绘制十字
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painter.setPen(QPen(QColor(0, 180, 255 , 180), 4));
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// 竖线;
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painter.drawLine(QPoint(sideLength_ >> 1, 0),
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QPoint(sideLength_ >> 1,
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imageHeight_ - 4));
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// 横线;
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painter.drawLine(QPoint(0, imageHeight_ >> 1),
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QPoint(sideLength_,
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imageHeight_ >> 1));
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/// 绘制大图内边框
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painter.setPen(QPen(Qt::white, 2));
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painter.drawRect(2,2,width()-4, imageHeight_-4);
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/// 绘制外边框
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painter.setPen(QPen(Qt::black, 1));
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painter.drawRect(0,0,width()-1,height()-1);
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/// 当前选中矩形的宽高信息;
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QString select_screen_info = QString("%1×%2")
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.arg(screenSize_.width()).arg(screenSize_.height());
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/// 当前鼠标像素值的RGB信息
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QImage image = originPainting_->toImage();
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QColor cursor_pixel = image.pixel(cursorPoint_);
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QString select_pt_rgb = QString("RGB:(%1,%2,%3)")
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.arg(cursor_pixel.red())
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.arg(cursor_pixel.green())
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.arg(cursor_pixel.blue());
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/// 绘制坐标轴相关数据
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painter.setPen(Qt::white);
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painter.drawText(QPoint(6, imageHeight_+14),select_screen_info);
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painter.drawText(QPoint(6, imageHeight_+27),select_pt_rgb);
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}
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