314 lines
7.9 KiB
C++
314 lines
7.9 KiB
C++
#include "QGraphicsViews.h"
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#include <QScrollBar>
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#include <QMenu>
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#include "ControlItem.h"
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#include "BaseItem.h"
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#include <QFileDialog>
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#include <QAction>
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#include <QLabel>
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#include "QGraphicsScenes.h"
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#include <QHBoxLayout>
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#include <QThread>
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#include <QPushButton>
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#include <QWidgetAction>
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#include "ImageItem.h"
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#include "qmutex.h"
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QGraphicsViews::QGraphicsViews(QWidget* parent) : QGraphicsView(parent)
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{
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this->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);//解决拖动是背景图片残影
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setDragMode(QGraphicsView::ScrollHandDrag);
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drawBg();
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// 隐藏水平/竖直滚动条
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setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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this->setBackgroundBrush(Qt::gray);
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// 设置场景范围
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setSceneRect(INT_MIN / 2, INT_MIN / 2, INT_MAX, INT_MAX);
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// 反锯齿
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setRenderHints(QPainter::Antialiasing);
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item = new ImageItem;
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scene = new QGraphicsScenes;
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scene->addItem(item);
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this->setScene(scene);
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drawItem = new DrawItem;
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AddItems(drawItem);
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GrayValue = new QLabel(this); //显示灰度值
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GrayValue->setObjectName("GrayValue_X");
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GrayValue->setStyleSheet("color:rgb(200,255,200); background-color:rgba(50,50,50,160); font: Microsoft YaHei;font-size: 15px;");
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GrayValue->setVisible(false);
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GrayValue->setFixedWidth(702);
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//显示区域
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fWidget = new QWidget(this);
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fWidget->setFixedHeight(25);
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fWidget->setGeometry(2, 538, 702, 25);
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fWidget->setStyleSheet("background-color:rgba(0,0,0,0);");
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auto fLayout = new QHBoxLayout(fWidget);
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fLayout->setSpacing(0);
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fLayout->setMargin(0);
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fLayout->addWidget(GrayValue);
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fLayout->addStretch();
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connect(item, &ImageItem::RGBValue, this, [&](QString InfoVal) {
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GrayValue->setText(InfoVal);
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});
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SetType(false, false);
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}
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void QGraphicsViews::DispImage(QImage& Image)
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{
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//加锁
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static QMutex mutex;
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QMutexLocker locker(&mutex);
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image = QPixmap::fromImage(Image);
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item->w = image.width();
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item->h = image.height();
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item->setPixmap(image);
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GetFit();
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}
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void QGraphicsViews::DispPoint(QVector<QPointF>& list, QColor color)
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{
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drawItem->ClearAll();
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drawItem->AddRegion(list);
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}
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void QGraphicsViews::AddItems(BaseItem* item)
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{
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item->scale = &ZoomValue;
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this->scene->addItem(item);
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}
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//设定信息模块是否显示
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void QGraphicsViews::SetType(bool InfoFlg, bool GrayValueFlg)
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{
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item->setAcceptHoverEvents(!InfoFlg);
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GrayValue->setVisible(!InfoFlg);
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}
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void QGraphicsViews::ClearObj()
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{
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foreach(auto item, scene->items())
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{
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if (item->type() == 10)
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{
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scene->removeItem(item);
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}
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}
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}
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void QGraphicsViews::SetToFit(qreal val)
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{
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ZoomFrame(val / ZoomValue);
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ZoomValue = val;
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QScrollBar* pHbar = this->horizontalScrollBar();
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pHbar->setSliderPosition(PixX);
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QScrollBar* pVbar = this->verticalScrollBar();
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pVbar->setSliderPosition(PixY);
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}
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void QGraphicsViews::ZoomFrame(double value)
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{
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this->scale(value, value);
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}
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void QGraphicsViews::GetFit()
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{
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if (this->width() < 1 || image.width() < 1)
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{
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return;
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}
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//图片自适应方法
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double winWidth = this->width();
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double winHeight = this->height();
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double ScaleWidth = (image.width() + 1) / winWidth;
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double ScaleHeight = (image.height() + 1) / winHeight;
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double row1, column1;
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double s = 0;
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if (ScaleWidth >= ScaleHeight)
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{
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row1 = -(1) * ((winHeight * ScaleWidth) - image.height()) / 2;
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column1 = 0;
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s = 1 / ScaleWidth;
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}
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else
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{
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row1 = 0;
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column1 = -(1.0) * ((winWidth * ScaleHeight) - image.width()) / 2;
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s = 1 / ScaleHeight;
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}
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if (ZoomFit != s || PixX != column1 * s)
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{
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ZoomFit = s;
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PixX = column1 * s;
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PixY = row1 * s;
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SetToFit(s);
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}
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}
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void QGraphicsViews::drawBg()
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{
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bgPix.fill(color1);
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QPainter painter(&bgPix);
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painter.fillRect(0, 0, 18, 18, color2);
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painter.fillRect(18, 18, 18, 18, color2);
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painter.end();
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}
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void QGraphicsViews::mousePressEvent(QMouseEvent* event)
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{
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QGraphicsView::mousePressEvent(event);
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}
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void QGraphicsViews::resizeEvent(QResizeEvent* event)
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{
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GetFit();
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QGraphicsView::resizeEvent(event);
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}
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void QGraphicsViews::mouseReleaseEvent(QMouseEvent* event)
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{
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QGraphicsView::mouseReleaseEvent(event);
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}
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void QGraphicsViews::mouseDoubleClickEvent(QMouseEvent* event)
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{
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SetToFit(ZoomFit);
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QGraphicsView::mouseDoubleClickEvent(event);
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}
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void QGraphicsViews::mouseMoveEvent(QMouseEvent* event)
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{
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QGraphicsView::mouseMoveEvent(event);
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}
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void QGraphicsViews::wheelEvent(QWheelEvent* event)
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{
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if ((event->delta() > 0) && (ZoomValue >= 50)) //最大放大到原始图像的50倍
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{
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return;
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}
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else if ((event->delta() < 0) && (ZoomValue <= 0.02))
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{
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return;
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}
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else
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{
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if (event->delta() > 0) //鼠标滚轮向前滚动
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{
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ZoomValue *= 1.1; //每次放大10%
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ZoomFrame(1.1);
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}
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else
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{
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ZoomFrame(0.9);
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ZoomValue *= 0.9; //每次缩小10%
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}
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}
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}
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void QGraphicsViews::drawBackground(QPainter* painter, const QRectF& rect)
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{
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Q_UNUSED(rect);
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painter->drawPixmap(QPoint(), image);
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}
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void QGraphicsViews::paintEvent(QPaintEvent* event)
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{
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QPainter paint(this->viewport());
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paint.drawTiledPixmap(QRect(QPoint(0, 0), QPoint(this->width(), this->height())), bgPix); //绘制背景
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QGraphicsView::paintEvent(event);
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}
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//右键菜单
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void QGraphicsViews::contextMenuEvent(QContextMenuEvent* event)
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{
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QPoint pos = event->pos();
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pos = this->mapToGlobal(pos);
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QMenu* menu = new QMenu(this);
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//菜单样式
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QString menuStyle(
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"QMenu::item{"
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"color: rgb(0, 0, 0);"
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"}"
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"QMenu::item:hover{"
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"background-color: rgb(176, 190, 225);"
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"}"
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"QMenu::item:selected{"
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"background-color: rgb(176, 190, 225);"
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"}"
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);
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QString buttonStyle(
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"QPushButton{"
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"color: rgb(0, 0, 0);"
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"border: none;"
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"text-align: left;"
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"font: 9pt Microsoft YaHei;"
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"padding-left: 5px;"
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"padding-right: 5px;"
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"}"
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"QPushButton::hover{"
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"background-color: rgba(176, 190, 225, 200);"
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"}"
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"QPushButton::selected{"
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"background-color: rgba(176, 190, 255, 255);"
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"}"
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);
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menu->setStyleSheet(menuStyle);
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QPushButton* zoomInAction_buf = new QPushButton(menu);
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zoomInAction_buf->setStyleSheet(buttonStyle);
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zoomInAction_buf->setText("放大");
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zoomInAction_buf->setIconSize(QSize(23, 23));
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zoomInAction_buf->setIcon(QIcon(":/res/ico/zoom.png"));
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QWidgetAction* zoomInAction = new QWidgetAction(this);
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zoomInAction->setDefaultWidget(zoomInAction_buf);
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connect(zoomInAction_buf, &QPushButton::clicked, this, &QGraphicsViews::OnZoomInImage);
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connect(zoomInAction_buf, &QPushButton::clicked, menu, &QMenu::close);
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menu->addAction(zoomInAction);
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menu->addSeparator();
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QPushButton* zoomOutAction_buf = new QPushButton(menu);
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zoomOutAction_buf->setStyleSheet(buttonStyle);
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zoomOutAction_buf->setText("缩小");
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zoomOutAction_buf->setIconSize(QSize(23, 23));
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zoomOutAction_buf->setIcon(QIcon(":/res/ico/zoom_out.png"));
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QWidgetAction* zoomOutAction = new QWidgetAction(this);
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zoomOutAction->setDefaultWidget(zoomOutAction_buf);
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connect(zoomOutAction_buf, &QPushButton::clicked, this, &QGraphicsViews::OnZoomOutImage);
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connect(zoomOutAction_buf, &QPushButton::clicked, menu, &QMenu::close);
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menu->addAction(zoomOutAction);
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menu->addSeparator();
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QPushButton* presetAction_buf = new QPushButton(menu);
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presetAction_buf->setStyleSheet(buttonStyle);
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presetAction_buf->setText("自适应图像");
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presetAction_buf->setIconSize(QSize(22, 22));
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presetAction_buf->setIcon(QIcon(":/res/ico/fit.png"));
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QWidgetAction* presetAction = new QWidgetAction(this);
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presetAction->setDefaultWidget(presetAction_buf);
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connect(presetAction_buf, &QPushButton::clicked, this, &QGraphicsViews::OnFitImage);
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connect(presetAction_buf, &QPushButton::clicked, menu, &QMenu::close);
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menu->addAction(presetAction);
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menu->exec(pos);
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}
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void QGraphicsViews::OnZoomInImage()
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{
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double tmp_buf = ZoomValue;
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tmp_buf *= 1.1;
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double tmp = tmp_buf / ZoomValue;
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ZoomValue *= tmp;
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this->scale(tmp, tmp);
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}
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void QGraphicsViews::OnZoomOutImage()
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{
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double tmp_buf = ZoomValue;
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tmp_buf *= 0.9;
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double tmp = tmp_buf / ZoomValue;
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ZoomValue *= tmp;
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this->scale(tmp, tmp);
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}
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void QGraphicsViews::OnFitImage()
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{
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SetToFit(ZoomFit);
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}
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