MyRectangleGeometry.Rect = LayoutInformation.GetLayoutSlot(txt1) RectangleGeometry myRectangleGeometry = new RectangleGeometry() private void getLayoutSlot1(object sender, e) This technique can be useful for displaying the bounding box of an element. The layout slot of the TextBlock is translated into a Path by using the GetLayoutSlot method. As additional elements are added to the Grid, this allocation could shrink or expand, depending on the type and size of elements that are added. The following illustration shows the bounding box for the TextBlock element.Īs shown by the yellow rectangle, the allocated space for the TextBlock element is actually much larger than it appears. The bounding box of any FrameworkElement can be retrieved by using the GetLayoutSlot method. While the text fills only the upper-left corner of the first column, the allocated space for the TextBlock is actually much larger.
Ī single TextBlock element is hosted within a Grid. This layout can be achieved by using the following XAML. The following illustration shows a simple layout.
It is important to remember that sizing characteristics defined on the parent element, such as a Border, affect its children. Processing this data, the layout system is able to calculate the position of all the children of a particular Panel. The size of the rectangle is determined by calculating the available screen space, the size of any constraints, layout-specific properties (such as margin and padding), and the individual behavior of the parent Panel element. The LayoutInformation class returns the boundaries of an element's layout allocation, or slot. Each FrameworkElement consumed by the layout system can be thought of as a rectangle that is slotted into the layout. When thinking about layout in WPF, it is important to understand the bounding box that surrounds all elements. Panel Elements and Custom Layout Behaviors This topic contains the following sections: Understanding how and when layout calculations occur is essential for creating user interfaces in WPF.
Flowlayout options not available with panel object windows#
This topic describes the Windows Presentation Foundation (WPF) layout system.