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赵4老师 2017-08-31
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CRectTracker
CRectTracker does not have a base class.
The CRectTracker class allows an item to be displayed, moved, and resized in different fashions. 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 articleTrackers in Visual C++ Programmer’s Guide.
#include <afxext.h>
Class Members | Hierarchy Chart
Samples MFC Sample TRACKER | MFC Sample DRAWCLI
See Also COleResizeBar, CRect, CRectTracker::GetHandleMask
pgao02 2017-08-31
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crecttraker可以去研究下，跟微软的一样带8个小爪
赵4老师 2017-08-29
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听说PhotoShop 1.0的源代码都公开了！
jsxyhelu2015 2017-08-27
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GreenOpenPaint的实现（五）矩形框
http://www.cnblogs.com/jsxyhelu/p/6354341.html
已经完全实现带代码，只是需要你去读懂。
rudy6 2017-08-26
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类似于这种
zgl7903 2017-08-26
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schlafenhamster 2017-08-26
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CRectTracker m_Tracker;
#define TRACK_SIZE 128
void CPartialBitmapView::OnInitialUpdate()
{
CView::OnInitialUpdate();
//
CRect rc;
GetClientRect(&rc);
CPoint pt=rc.CenterPoint();
rc.left=pt.x-TRACK_SIZE/2;
rc.right=pt.x+TRACK_SIZE/2;
rc.top=pt.y-TRACK_SIZE/2;
rc.bottom=pt.y+TRACK_SIZE/2;
m_Tracker.m_rect=rc;
m_Tracker.m_nStyle |= CRectTracker::solidLine;
m_Tracker.m_nStyle |= CRectTracker::resizeInside;
}
GDI的出现使程序员无需要关心硬件设备及设备驱动，就可以将应用程序的输出转化为硬件设备上的输出，实现了程序开发者与硬件设备的隔离，大大方便了开发工作。 GDI+（Graphics Device ...
