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1 #pragma once
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2
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3 #include "win32_op.h"
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4 #include "win32_utility.h"
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5
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6 class CMiddleDragOverlay : public CWindowImpl<CMiddleDragOverlay,CWindow, CWinTraits<WS_POPUP, WS_EX_LAYERED> > {
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7 public:
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8 DECLARE_WND_CLASS_EX(TEXT("{61BFC7AD-C00F-4CEA-8E6A-EA22E01F43F9}"),0,(-1));
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9
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10 enum {
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11 ColorKey = 0xc0ffee
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12 };
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13
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14 BEGIN_MSG_MAP_EX(CMiddleDragOverlay)
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15 MESSAGE_HANDLER(WM_CREATE,OnCreate);
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16 MSG_WM_ERASEBKGND(OnEraseBkgnd)
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17 MSG_WM_PAINT(OnPaint)
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18 END_MSG_MAP()
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19
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20 void ShowHere(CPoint pt);
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21 private:
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22 LRESULT OnCreate(UINT,WPARAM,LPARAM,BOOL&) {
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23 ::SetLayeredWindowAttributes(*this,ColorKey,0,LWA_COLORKEY);
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24 return 0;
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25 }
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26 BOOL OnEraseBkgnd(CDCHandle dc) {
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27 CRect rcClient;
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28 WIN32_OP_D(GetClientRect(rcClient));
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29 dc.FillSolidRect(rcClient, ColorKey);
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30 return TRUE;
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31 }
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32 void OnPaint(CDCHandle dc) {
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33 if (dc) {
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34 Paint(dc);
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35 } else {
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36 CPaintDC pdc(*this);
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37 Paint(pdc.m_hDC);
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38 }
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39 }
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40 void Paint(CDCHandle dc);
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41 };
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