CRectTracker Class

Allows an item to be displayed, moved, and resized in different fashions.

class CRectTracker

Members

Public Constructors

Name	Description
CRectTracker::CRectTracker	Constructs a CRectTracker object.

Public Methods

Name	Description
CRectTracker::AdjustRect	Called when the rectangle is resized.
CRectTracker::Draw	Renders the rectangle.
CRectTracker::DrawTrackerRect	Called when drawing the border of a CRectTracker object.
CRectTracker::GetHandleMask	Called to get the mask of a CRectTrackeritem's resize handles.
CRectTracker::GetTrueRect	Returns width and height of rectangle, including resize handles.
CRectTracker::HitTest	Returns the current position of the cursor related to the CRectTracker object.
CRectTracker::NormalizeHit	Normalizes a hit-test code.
CRectTracker::OnChangedRect	Called when the rectangle has been resized or moved.
CRectTracker::SetCursor	Sets the cursor, depending on its position over the rectangle.
CRectTracker::Track	Allows the user to manipulate the rectangle.
CRectTracker::TrackRubberBand	Allows the user to "rubber-band" the selection.

Public Data Members

Name	Description
CRectTracker::m_nHandleSize	Determines size of resize handles.
CRectTracker::m_nStyle	Current style(s) of the tracker.
CRectTracker::m_rect	Current position (in pixels) of the rectangle.
CRectTracker::m_sizeMin	Determines minimum rectangle width and height.

Remarks

CRectTracker does not have a base class.

Although the CRectTracker class is designed to allow the user to interact with OLE items by using a graphical interface, its use is not restricted to OLE-enabled applications. It can be used anywhere such a user interface is required.

CRectTracker borders can be solid or dotted lines. The item can be given a hatched border or overlaid with a hatched pattern to indicate different states of the item. You can place eight resize handles on either the outside or the inside border of the item. (For an explanation of the resize handles, see GetHandleMask.) Finally, a CRectTracker allows you to change the orientation of an item during resizing.

To use CRectTracker, construct a CRectTracker object and specify which display states are initialized. You can then use this interface to give the user visual feedback on the current status of the OLE item associated with the CRectTracker object.

For more information on using CRectTracker, see the article Trackers.

Inheritance Hierarchy

CRectTracker

Requirements

Header: afxext.h

See Also

Reference

Hierarchy Chart

COleResizeBar Class

CRect Class

CRectTracker::GetHandleMask

Concepts

MFC Sample TRACKER

MFC Sample DRAWCLI