ZFX + Developia

Code: Alles auswählen

  struct ChildWindowArea {
    SignedInt4B   x; // relative to the left edge of the parent's client area
    SignedInt4B   y; // relative to the upper edge of the parent's client area
    UnsignedInt4B widthInPixels;
    UnsignedInt4B heightInPixels;
  };

  // Positions one or more windows sharing a common parent. Causes one redraw instead of n.
  bool layOutChildWindows(
    HWND const *            toChilds,
    HWND const * const      toEndOfChilds,
    ChildWindowArea const * toNewPositions
  ) {
    MUST(toEndOfChilds > toChilds && 0x7FFFFFFF >= toEndOfChilds - toChilds); // WinAPI limit
#   if _DEBUG
      auto const commonParent = GetParent(toChilds[0]);
#   endif

    // "By specifying the maximum size needed, an application can detect and process failure early in the process."
    auto state = WINAPI_SHOULD_SUCCEED(BeginDeferWindowPos(int(toEndOfChilds - toChilds)));
    if(nullptr == state) {
      return no;
    }

    do {
#     if _DEBUG
        MUST(commonParent == GetParent(*toChilds));
#     endif
      MUST(65536 >= toNewPositions->widthInPixels); // Reasonable?
      MUST(65536 >= toNewPositions->heightInPixels); // Reasonable?

      // Since all resources have been allocated upfront, this call cannot fail. Note: "The handle returned by this function
      //  may differ from the handle passed to the function."
      state = WINAPI_SHOULD_SUCCEED(DeferWindowPos(state,
        *toChilds,
        nullptr, // ignored due to 'SWP_NOZORDER'
        toNewPositions->x, toNewPositions->y, int(toNewPositions->widthInPixels), int(toNewPositions->heightInPixels),
        SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_NOACTIVATE
      ));

    } while(++toNewPositions, ++toChilds < toEndOfChilds);

    WINAPI_SHOULD_SUCCEED(EndDeferWindowPos(state));
    return yes;
  }

Code: Alles auswählen

  void FooDialog::resize() {
    HWND const            controls[3] = { okButton, cancelButton, retryButton };
    ChildWindowArea const positions[3] = { ... };
    layOutChildWindows(toBeginningOf(controls), toEndOf(controls), toBeginningOf(positions));
  }

Code: Alles auswählen

void Funktion( const char* text, ...) { ... }
void Funktion( const char* text, va_list params) { ... }

std::vector<char> text( 1, 0); // Text nur aus dem abschließenden Nullbyte bestehend
Funktion( "%s", text.data()); // Crash