Center the ExtendedInfoWindow on the screen.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31990 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/powerstatus/ExtendedInfoWindow.cpp

@@ -12,6 +12,7 @@
 #include <GroupLayout.h>
 #include <GroupView.h>
 #include <SpaceLayoutItem.h>
+#include <Screen.h>
 #include <String.h>
 
 
@@ -77,6 +78,19 @@ BatteryInfoView::GetPreferredSize(float *width, float *height)
 }
 
 
+void
+BatteryInfoView::AttachedToWindow()
+{
+	BRect rect = BScreen().Frame();
+	BRect windowFrame = Window()->Frame();
+	BPoint position;
+	// center window on screen
+	position.x = (rect.Width() - windowFrame.Width()) / 2;
+	position.y = (rect.Height() - windowFrame.Height()) / 2;
+	Window()->MoveTo(position);
+}
+
+
 BSize
 BatteryInfoView::_MeasureString(const BString& string)
 {

src/apps/powerstatus/ExtendedInfoWindow.h

@@ -38,6 +38,7 @@ class BatteryInfoView : public BView
 							acpi_extended_battery_info& extInfo);
 		virtual	void	Draw(BRect updateRect);
 		virtual void	GetPreferredSize(float *width, float *height);
+		virtual void	AttachedToWindow();
 
 	private:
 		BSize			_MeasureString(const BString& string);