Added MultipleWindows platform capability.

Several platform plugins, like eglfs, kms, etc don't support multiple
windows as there's no system compositor, they're rendering directly to
a single back buffer. By adding a platform capability we'll be able to
provide better error reporting when an application tries to create
multiple QWindows on a single-window platform. Also, QML apps can use
this capability to figure out whether they should create a QWindow for
dialogs / popups / menus, or whether to just create items in the same
scene, that are shown on top of the rest of the content.

Change-Id: I15b8d21ee2bc4568e9d705dbf32f872c2c25742b
Reviewed-by: Andy Nichols <andy.nichols@digia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/plugins/platforms/minimal/qminimalintegration.cpp b/src/plugins/platforms/minimal/qminimalintegration.cpp
index 6a2db91e34..e9fab6d87c 100644
--- a/src/plugins/platforms/minimal/qminimalintegration.cpp
+++ b/src/plugins/platforms/minimal/qminimalintegration.cpp
@@ -74,6 +74,7 @@ bool QMinimalIntegration::hasCapability(QPlatformIntegration::Capability cap) co
 {
     switch (cap) {
     case ThreadedPixmaps: return true;
+    case MultipleWindows: return true;
     default: return QPlatformIntegration::hasCapability(cap);
     }
 }