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KScreen::Config::current can return null

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This commit is contained in:
Albert Astals Cid 2014-05-01 13:27:19 +02:00
parent 67a2a1222c
commit 9252044c0c
1 changed files with 30 additions and 28 deletions
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58
core/utils.cpp
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@ -100,40 +100,42 @@ QSizeF Utils::realDpi(QWidget* widgetOnScreen)
// Firstly try to retrieve DPI via LibKScreen
#if HAVE_LIBKSCREEN
KScreen::Config* config = KScreen::Config::current();
KScreen::OutputList outputs = config->outputs();
QPoint globalPos = widgetOnScreen->parentWidget() ?
widgetOnScreen->mapToGlobal(widgetOnScreen->pos()):
widgetOnScreen->pos();
QRect widgetRect(globalPos, widgetOnScreen->size());
if (config) {
KScreen::OutputList outputs = config->outputs();
QPoint globalPos = widgetOnScreen->parentWidget() ?
widgetOnScreen->mapToGlobal(widgetOnScreen->pos()):
widgetOnScreen->pos();
QRect widgetRect(globalPos, widgetOnScreen->size());
KScreen::Output* selectedOutput = 0;
int maxArea = 0;
Q_FOREACH(KScreen::Output *output, outputs)
{
if (output->currentMode())
KScreen::Output* selectedOutput = 0;
int maxArea = 0;
Q_FOREACH(KScreen::Output *output, outputs)
{
QRect outputRect(output->pos(),output->currentMode()->size());
QRect intersection = outputRect.intersected(widgetRect);
int area = intersection.width()*intersection.height();
if (area > maxArea)
if (output->currentMode())
{
maxArea = area;
selectedOutput = output;
QRect outputRect(output->pos(),output->currentMode()->size());
QRect intersection = outputRect.intersected(widgetRect);
int area = intersection.width()*intersection.height();
if (area > maxArea)
{
maxArea = area;
selectedOutput = output;
}
}
}
}
if (selectedOutput)
{
kDebug() << "Found widget at output #" << selectedOutput->id();
QRect outputRect(selectedOutput->pos(),selectedOutput->currentMode()->size());
QSize szMM = selectedOutput->sizeMm();
kDebug() << "Output size is " << szMM;
if (szMM.width() > 0 && szMM.height() > 0 && outputRect.width() > 0 && outputRect.height() > 0) {
QSizeF res(static_cast<qreal>(outputRect.width())*25.4/szMM.width(),
static_cast<qreal>(outputRect.height())*25.4/szMM.height());
kDebug() << "Output DPI is " << res;
return res;
if (selectedOutput)
{
kDebug() << "Found widget at output #" << selectedOutput->id();
QRect outputRect(selectedOutput->pos(),selectedOutput->currentMode()->size());
QSize szMM = selectedOutput->sizeMm();
kDebug() << "Output size is " << szMM;
if (szMM.width() > 0 && szMM.height() > 0 && outputRect.width() > 0 && outputRect.height() > 0) {
QSizeF res(static_cast<qreal>(outputRect.width())*25.4/szMM.width(),
static_cast<qreal>(outputRect.height())*25.4/szMM.height());
kDebug() << "Output DPI is " << res;
return res;
}
}
}
#endif