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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "qdesktopwidget.h"
#include "qapplication.h"
#include "nsScreenManagerQt.h"
#include "nsScreenQt.h"
nsScreenManagerQt::nsScreenManagerQt()
{
desktop = 0;
screens = 0;
}
nsScreenManagerQt::~nsScreenManagerQt()
{
delete [] screens;
}
// addref, release, QI
NS_IMPL_ISUPPORTS1(nsScreenManagerQt, nsIScreenManager)
void nsScreenManagerQt::init()
{
if (desktop)
return;
desktop = QApplication::desktop();
nScreens = desktop->numScreens();
screens = new nsCOMPtr<nsIScreen>[nScreens];
for (int i = 0; i < nScreens; ++i)
screens[i] = new nsScreenQt(i);
}
//
// ScreenForRect
//
// Returns the screen that contains the rectangle. If the rect overlaps
// multiple screens, it picks the screen with the greatest area of intersection.
//
// The coordinates are in pixels (not twips) and in screen coordinates.
//
NS_IMETHODIMP
nsScreenManagerQt::ScreenForRect(int32_t inLeft, int32_t inTop,
int32_t inWidth, int32_t inHeight,
nsIScreen **outScreen)
{
if (!desktop)
init();
QRect r(inLeft, inTop, inWidth, inHeight);
int best = 0;
int area = 0;
for (int i = 0; i < nScreens; ++i) {
const QRect& rect = desktop->screenGeometry(i);
QRect intersection = r▭
int a = intersection.width()*intersection.height();
if (a > area) {
best = i;
area = a;
}
}
NS_IF_ADDREF(*outScreen = screens[best]);
return NS_OK;
}
//
// GetPrimaryScreen
//
// The screen with the menubar/taskbar. This shouldn't be needed very
// often.
//
NS_IMETHODIMP
nsScreenManagerQt::GetPrimaryScreen(nsIScreen **aPrimaryScreen)
{
if (!desktop)
init();
NS_IF_ADDREF(*aPrimaryScreen = screens[0]);
return NS_OK;
}
//
// GetNumberOfScreens
//
// Returns how many physical screens are available.
//
NS_IMETHODIMP
nsScreenManagerQt::GetNumberOfScreens(uint32_t *aNumberOfScreens)
{
if (!desktop)
init();
*aNumberOfScreens = desktop->numScreens();
return NS_OK;
}
NS_IMETHODIMP
nsScreenManagerQt::GetSystemDefaultScale(float *aDefaultScale)
{
*aDefaultScale = 1.0f;
return NS_OK;
}
NS_IMETHODIMP
nsScreenManagerQt :: ScreenForNativeWidget (void *aWidget, nsIScreen **outScreen)
{
// I don't know how to go from GtkWindow to nsIScreen, especially
// given xinerama and stuff, so let's just do this
QRect rect = static_cast<QWidget*>(aWidget)->geometry();
return ScreenForRect(rect.x(), rect.y(), rect.width(), rect.height(), outScreen);
}
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