Fix monitor preview messing monitor zoom

src/monitor/glwidget.cpp

@@ -1245,8 +1245,8 @@ QRect GLWidget::displayRect() const
 
 QPoint GLWidget::offset() const
 {
-    return {m_offset.x() - ((int)((float)m_profileSize.width() * m_zoom) - width()) / 2,
-            m_offset.y() - ((int)((float)m_profileSize.height() * m_zoom) - height()) / 2};
+    return {m_offset.x() - ((int) width() * m_zoom / 2),
+            m_offset.y() - ((int) height() * m_zoom / 2)};
 }
 
 void GLWidget::setZoom(float zoom)

src/monitor/monitor.cpp

@@ -844,25 +844,23 @@ void Monitor::adjustScrollBars(float horizontal, float vertical)
 {
     if (m_glMonitor->zoom() > 1.0f) {
         m_horizontalScroll->setPageStep(m_glWidget->width());
-        m_horizontalScroll->setMaximum((int)((float)m_glMonitor->profileSize().width() * m_glMonitor->zoom()) - m_horizontalScroll->pageStep());
+        m_horizontalScroll->setMaximum(m_glWidget->width() * m_glMonitor->zoom());
         m_horizontalScroll->setValue(qRound(horizontal * float(m_horizontalScroll->maximum())));
         emit m_horizontalScroll->valueChanged(m_horizontalScroll->value());
         m_horizontalScroll->show();
     } else {
-        int max = (int)((float)m_glMonitor->profileSize().width() * m_glMonitor->zoom()) - m_glWidget->width();
-        emit m_horizontalScroll->valueChanged(qRound(0.5 * max));
+        emit m_horizontalScroll->valueChanged(qRound(0.5 * m_glWidget->width() * m_glMonitor->zoom()));
         m_horizontalScroll->hide();
     }
 
     if (m_glMonitor->zoom() > 1.0f) {
         m_verticalScroll->setPageStep(m_glWidget->height());
-        m_verticalScroll->setMaximum((int)((float)m_glMonitor->profileSize().height() * m_glMonitor->zoom()) - m_verticalScroll->pageStep());
+        m_verticalScroll->setMaximum(m_glWidget->height() * m_glMonitor->zoom());
         m_verticalScroll->setValue((int)((float)m_verticalScroll->maximum() * vertical));
         emit m_verticalScroll->valueChanged(m_verticalScroll->value());
         m_verticalScroll->show();
     } else {
-        int max = (int)((float)m_glMonitor->profileSize().height() * m_glMonitor->zoom()) - m_glWidget->height();
-        emit m_verticalScroll->valueChanged(qRound(0.5 * max));
+        emit m_verticalScroll->valueChanged(qRound(0.5 * m_glWidget->height() * m_glMonitor->zoom()));
         m_verticalScroll->hide();
     }
 }