Make QMargins a proper class

Since we need QMargins for other things then
the CSS helper functions in drawutil, we have to make it more
generic. It is already useful for QWidget::contentsMargins
for example. This ensures we have some flexibility on how to
use and modify it in the future.

Reviewed-by: mbm

2 files changed, 39 insertions, 1 deletions

diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index ff644b8..37ffa8fb 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -6748,7 +6748,27 @@ void QWidget::setContentsMargins(int left, int top, int right, int bottom)
     QApplication::sendEvent(this, &e);
 }
 
-/*!  Returns the widget's contents margins for \a left, \a top, \a
+/*!
+  \overload
+  \since 4.6
+
+  Sets the margins around the contents of the widget to have the
+  sizes determined by \a margins. The margins are
+  used by the layout system, and may be used by subclasses to
+  specify the area to draw in (e.g. excluding the frame).
+
+  Changing the margins will trigger a resizeEvent().
+
+  \sa contentsRect(), getContentsMargins()
+*/
+void QWidget::setContentsMargins(const QMargins &margins)
+{
+    setContentsMargins(margins.left(), margins.top(),
+                       margins.right(), margins.bottom());
+}
+
+/*!
+  Returns the widget's contents margins for \a left, \a top, \a
   right, and \a bottom.
 
   \sa setContentsMargins(), contentsRect()
@@ -6767,6 +6787,20 @@ void QWidget::getContentsMargins(int *left, int *top, int *right, int *bottom) c
 }
 
 /*!
+  \since 4.6
+
+  Returns the widget's contents margins.
+
+  \sa getContentsMargins(), setContentsMargins(), contentsRect()
+ */
+QMargins QWidget::contentsMargins() const
+{
+    Q_D(const QWidget);
+    return QMargins(d->leftmargin, d->topmargin, d->rightmargin, d->bottommargin);
+}
+
+
+/*!
     Returns the area inside the widget's margins.
 
     \sa setContentsMargins(), getContentsMargins()
diff --git a/src/gui/kernel/qwidget.h b/src/gui/kernel/qwidget.h
index 38650f0..f398dbd 100644
--- a/src/gui/kernel/qwidget.h
+++ b/src/gui/kernel/qwidget.h
@@ -44,6 +44,7 @@
 
 #include <QtGui/qwindowdefs.h>
 #include <QtCore/qobject.h>
+#include <QtCore/qmargins.h>
 #include <QtGui/qpaintdevice.h>
 #include <QtGui/qpalette.h>
 #include <QtGui/qfont.h>
@@ -527,7 +528,10 @@ public:
     QRegion visibleRegion() const;
 
     void setContentsMargins(int left, int top, int right, int bottom);
+    void setContentsMargins(const QMargins &margins);
     void getContentsMargins(int *left, int *top, int *right, int *bottom) const;
+    QMargins contentsMargins() const;
+
     QRect contentsRect() const;
 
 public: