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トップCに関する質問WinAPI マウスへのウィンドウの追尾

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3

修正

2018/12/06 23:41

投稿

asm
asm

スコア15147

test CHANGED
@@ -12,7 +12,7 @@
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12
 
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  case WM_MOUSEMOVE:
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- if(wParam && MK_LBUTTON){
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+ if(wParam & MK_LBUTTON){
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  position.x = GET_X_LPARAM(lParam);
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2

GetDCよりもBeginPaint

2018/12/06 23:41

投稿

asm
asm

スコア15147

test CHANGED
@@ -58,15 +58,13 @@
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  PAINTSTRUCT ps = {};
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- HDC hdc = GetDC(hwnd);
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-
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  wchar_t message[256];
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  wsprintf(message, L"(x,y)=%6d,%6d", position.x, position.y);
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- BeginPaint(hwnd, &ps);
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+ HDC hdc = BeginPaint(hwnd, &ps);
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  DrawText(hdc, message, lstrlen(message), &ps.rcPaint, DT_CENTER | DT_SINGLELINE | DT_VCENTER);
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1

追記

2018/12/06 23:12

投稿

asm
asm

スコア15147

test CHANGED
@@ -14,7 +14,13 @@
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  if(wParam && MK_LBUTTON){
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+ position.x = GET_X_LPARAM(lParam);
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+
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+ position.y = GET_Y_LPARAM(lParam);
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+
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- MoveWindow(chwnd, GET_X_LPARAM(lParam) + 5, GET_Y_LPARAM(lParam) - 35, 300, 30, TRUE);
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+ MoveWindow(chwnd, position.x + 5, position.y - 35, 300, 30, TRUE);
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+
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+ InvalidateRect(chwnd, NULL, TRUE);
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  }
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@@ -29,3 +35,59 @@
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  MoveWindow(chwnd, 0, 0, 0, 0, TRUE);
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  ```
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+
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+
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+
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+ ```c
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+
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+ LRESULT CALLBACK ChildWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
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+
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+ switch (uMsg) {
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+
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+ case WM_CREATE:
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+
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+
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+
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+ break;
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+
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+
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+
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+ case WM_PAINT:
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+
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+ {
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+
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+ PAINTSTRUCT ps = {};
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+
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+ HDC hdc = GetDC(hwnd);
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+
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+ wchar_t message[256];
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+
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+ wsprintf(message, L"(x,y)=%6d,%6d", position.x, position.y);
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+
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+
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+
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+ BeginPaint(hwnd, &ps);
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+
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+ DrawText(hdc, message, lstrlen(message), &ps.rcPaint, DT_CENTER | DT_SINGLELINE | DT_VCENTER);
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+
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+ EndPaint(hwnd, &ps);
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+
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+ }
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+
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+ break;
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+
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+
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+
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+ case WM_DESTROY:
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+
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+ break;
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+
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+ }
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+
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+
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+
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+ return DefWindowProc(hwnd, uMsg, wParam, lParam);
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+
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+ }
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+
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+ ```