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https://github.com/YACReader/yacreader
synced 2025-07-18 21:14:33 -04:00
Headless server: simplify system config logger
This commit is contained in:
Felix Kauselmann
292
YACReader/magnifying_glass.cpp
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292
YACReader/magnifying_glass.cpp
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#include "magnifying_glass.h"
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#include "viewer.h"
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#include "configuration.h"
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#include "shortcuts_manager.h"
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#include <QScrollBar>
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MagnifyingGlass::MagnifyingGlass(int w, int h, QWidget * parent)
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:QLabel(parent),zoomLevel(0.5)
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{
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setup(QSize(w,h));
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}
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MagnifyingGlass::MagnifyingGlass(const QSize & size, QWidget * parent)
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:QLabel(parent),zoomLevel(0.5)
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{
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setup(size);
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}
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void MagnifyingGlass::setup(const QSize & size)
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{
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resize(size);
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setScaledContents(true);
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setMouseTracking(true);
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setCursor(QCursor(QBitmap(1,1),QBitmap(1,1)));
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}
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void MagnifyingGlass::mouseMoveEvent(QMouseEvent * event)
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{
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updateImage();
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event->accept();
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}
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void MagnifyingGlass::updateImage(int x, int y)
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{
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//image section augmented
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int zoomWidth = static_cast<int>(width() * zoomLevel);
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int zoomHeight = static_cast<int>(height() * zoomLevel);
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Viewer * p = (Viewer *)parent();
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int currentPos = p->verticalScrollBar()->sliderPosition();
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const QPixmap * image = p->pixmap();
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int iWidth = image->width();
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int iHeight = image->height();
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float wFactor = static_cast<float>(iWidth) / p->widget()->width();
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float hFactor = static_cast<float>(iHeight) / p->widget()->height();
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zoomWidth *= wFactor;
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zoomHeight *= hFactor;
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if(p->verticalScrollBar()->minimum()==p->verticalScrollBar()->maximum())
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{
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int xp = static_cast<int>(((x-p->widget()->pos().x())*wFactor)-zoomWidth/2);
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int yp = static_cast<int>((y-p->widget()->pos().y()+currentPos)*hFactor-zoomHeight/2);
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int xOffset=0;
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int yOffset=0;
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int zw=zoomWidth;
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int zh=zoomHeight;
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//int wOffset,hOffset=0;
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bool outImage = false;
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if(xp<0)
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{
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xOffset = -xp;
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xp=0;
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zw = zw - xOffset;
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outImage = true;
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}
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if(yp<0)
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{
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yOffset = -yp;
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yp=0;
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zh = zh - yOffset;
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outImage = true;
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}
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if(xp+zoomWidth >= image->width())
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{
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zw -= xp+zw - image->width();
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outImage = true;
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}
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if(yp+zoomHeight >= image->height())
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{
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zh -= yp+zh - image->height();
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outImage = true;
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}
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if(outImage)
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{
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QImage img(zoomWidth,zoomHeight,QImage::Format_RGB32);
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img.fill(Configuration::getConfiguration().getBackgroundColor());
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if(zw>0&&zh>0)
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{
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QPainter painter(&img);
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painter.drawPixmap(xOffset,yOffset,p->pixmap()->copy(xp,yp,zw,zh));
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}
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setPixmap(QPixmap().fromImage(img));
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}
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else
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setPixmap(p->pixmap()->copy(xp,yp,zoomWidth,zoomHeight));
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}
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else
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{
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int xp = static_cast<int>(((x-p->widget()->pos().x())*wFactor)-zoomWidth/2);
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int yp = static_cast<int>((y+currentPos)*hFactor-zoomHeight/2);
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int xOffset=0;
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int yOffset=0;
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int zw=zoomWidth;
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int zh=zoomHeight;
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//int wOffset,hOffset=0;
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bool outImage = false;
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if(xp<0)
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{
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xOffset = -xp;
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xp=0;
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zw = zw - xOffset;
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outImage = true;
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}
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if(yp<0)
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{
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yOffset = -yp;
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yp=0;
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zh = zh - yOffset;
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outImage = true;
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}
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if(xp+zoomWidth >= image->width())
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{
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zw -= xp+zw - image->width();
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outImage = true;
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}
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if(yp+zoomHeight >= image->height())
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{
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zh -= yp+zh - image->height();
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outImage = true;
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}
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if(outImage)
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{
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QImage img(zoomWidth,zoomHeight,QImage::Format_RGB32);
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img.fill(Configuration::getConfiguration().getBackgroundColor());
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if(zw>0&&zh>0)
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{
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QPainter painter(&img);
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painter.drawPixmap(xOffset,yOffset,p->pixmap()->copy(xp,yp,zw,zh));
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}
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setPixmap(QPixmap().fromImage(img));
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}
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else
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setPixmap(p->pixmap()->copy(xp,yp,zoomWidth,zoomHeight));
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}
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move(static_cast<int>(x-float(width())/2),static_cast<int>(y-float(height())/2));
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}
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void MagnifyingGlass::updateImage()
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{
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if(isVisible())
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{
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QPoint p = QPoint(cursor().pos().x(),cursor().pos().y());
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p = this->parentWidget()->mapFromGlobal(p);
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updateImage(p.x(),p.y());
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}
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}
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void MagnifyingGlass::wheelEvent(QWheelEvent * event)
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{
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switch(event->modifiers())
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{
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//size
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case Qt::NoModifier:
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if(event->delta()<0)
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sizeUp();
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else
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sizeDown();
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break;
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//size height
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case Qt::ControlModifier:
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if(event->delta()<0)
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heightUp();
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else
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heightDown();
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break;
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//size width
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case Qt::AltModifier:
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if(event->delta()<0)
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widthUp();
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else
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widthDown();
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break;
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//zoom level
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case Qt::ShiftModifier:
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if(event->delta()<0)
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zoomIn();
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else
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zoomOut();
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break;
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}
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updateImage();
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event->setAccepted(true);
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}
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void MagnifyingGlass::zoomIn()
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{
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if(zoomLevel>0.2f)
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zoomLevel -= 0.025f;
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}
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void MagnifyingGlass::zoomOut()
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{
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if(zoomLevel<0.9f)
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zoomLevel += 0.025f;
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}
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void MagnifyingGlass::sizeUp()
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{
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Viewer * p = (Viewer *)parent();
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if(width()<(p->width()*0.90f))
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resize(width()+30,height()+15);
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}
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void MagnifyingGlass::sizeDown()
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{
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if(width()>175)
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resize(width()-30,height()-15);
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}
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void MagnifyingGlass::heightUp()
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{
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Viewer * p = (Viewer *)parent();
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if(height()<(p->height()*0.90f))
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resize(width(),height()+15);
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}
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void MagnifyingGlass::heightDown()
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{
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if(height()>80)
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resize(width(),height()-15);
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}
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void MagnifyingGlass::widthUp()
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{
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Viewer * p = (Viewer *)parent();
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if(width()<(p->width()*0.90f))
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resize(width()+30,height());
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}
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void MagnifyingGlass::widthDown()
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{
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if(width()>175)
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resize(width()-30,height());
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}
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void MagnifyingGlass::keyPressEvent(QKeyEvent *event)
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{
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bool validKey = false;
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int _key = event->key();
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Qt::KeyboardModifiers modifiers = event->modifiers();
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if(modifiers & Qt::ShiftModifier)
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_key |= Qt::SHIFT;
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if (modifiers & Qt::ControlModifier)
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_key |= Qt::CTRL;
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if (modifiers & Qt::MetaModifier)
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_key |= Qt::META;
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if (modifiers & Qt::AltModifier)
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_key |= Qt::ALT;
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QKeySequence key(_key);
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if (key == ShortcutsManager::getShortcutsManager().getShortcut(SIZE_UP_MGLASS_ACTION_Y))
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{
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sizeUp();
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validKey = true;
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}
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else if (key == ShortcutsManager::getShortcutsManager().getShortcut(SIZE_DOWN_MGLASS_ACTION_Y))
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{
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sizeDown();
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validKey = true;
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}
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else if (key == ShortcutsManager::getShortcutsManager().getShortcut(ZOOM_IN_MGLASS_ACTION_Y))
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{
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zoomIn();
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validKey = true;
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}
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else if (key == ShortcutsManager::getShortcutsManager().getShortcut(ZOOM_OUT_MGLASS_ACTION_Y))
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{
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zoomOut();
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validKey = true;
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}
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if(validKey)
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{
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updateImage();
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event->setAccepted(true);
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}
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}
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