使用 LoadToolbarEx 解决异常以及正常图像与大图像计数之间的差异

Question

我刚刚尝试在调试中运行我的CDialog应用程序，但出现异常。这与我创建工具栏有关。

我在OnInitDialog中称之为提及：

void CMeetingScheduleAssistantDlg::CreateToolbar()
{
DWORD dwCtrlStyle = TBSTYLE_FLAT | TBSTYLE_TOOLTIPS | CBRS_SIZE_DYNAMIC;
DWORD dwStyle = AFX_DEFAULT_TOOLBAR_STYLE;
if (m_ToolBar.CreateEx(this, dwCtrlStyle,
dwStyle, CRect(1, 1, 1, 1), IDR_TOOLBAR))
{
dwStyle = CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC;
m_ToolBar.SetPaneStyle(m_ToolBar.GetPaneStyle() | dwStyle);
CMFCToolBarInfo info;
info.m_uiColdResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiHotResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiLargeColdResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiLargeHotResID = IDB_PNG_MAIN_TOOLBAR;
m_ToolBar.LoadToolBarEx(IDR_TOOLBAR, info, FALSE);
CSize   sizeToolBar = m_ToolBar.CalcFixedLayout(TRUE, TRUE);
m_ToolBar.SetWindowPos(NULL, 0, 0, sizeToolBar.cx, sizeToolBar.cy,
SWP_NOACTIVATE | SWP_NOZORDER);
// Move all controls down
CPoint ptOffset(0, sizeToolBar.cy);
CRect  rcChild;
CWnd* pwndChild = GetWindow(GW_CHILD);
while (pwndChild)
{
if (pwndChild->GetSafeHwnd() != m_ToolBar.GetSafeHwnd())
{
pwndChild->GetWindowRect(rcChild);
ScreenToClient(rcChild);
rcChild.OffsetRect(ptOffset);
pwndChild->MoveWindow(rcChild, FALSE);
}
pwndChild = pwndChild->GetNextWindow();
}
// Resize the window
CRect rcWindow;
GetWindowRect(rcWindow);
rcWindow.bottom += sizeToolBar.cy;
MoveWindow(rcWindow, FALSE);
}
}

例外情况在此行：

LoadToolBarEx

当我跟踪代码时，我最终会得到以下ASSERT：

// Load large images:
if (params.m_uiLargeHotResID != 0)
{
if (!m_LargeImages.Load(params.m_uiLargeHotResID, NULL, TRUE))
{
return FALSE;
}
ASSERT(m_Images.GetCount() == m_LargeImages.GetCount());
}

当我查看这些变量时：

• m_Images有 10 张图片。
• m_LargeImages有 5 张图片。

这是调用堆栈：

>   Meeting Schedule Assistant.exe!CMFCToolBar::LoadBitmapEx(CMFCToolBarInfo & params, int bLocked) Line 781    C++
Meeting Schedule Assistant.exe!CMFCToolBar::LoadToolBarEx(unsigned int uiToolbarResID, CMFCToolBarInfo & params, int bLocked) Line 872  C++
Meeting Schedule Assistant.exe!CMeetingScheduleAssistantDlg::CreateToolbar() Line 2288  C++
Meeting Schedule Assistant.exe!CMeetingScheduleAssistantDlg::OnInitDialog() Line 246    C++
Meeting Schedule Assistant.exe!AfxDlgProc(HWND__ * hWnd, unsigned int message, unsigned __int64 __formal, __int64 __formal) Line 28 C++
[External Code] 
Meeting Schedule Assistant.exe!CWnd::DefWindowProcW(unsigned int nMsg, unsigned __int64 wParam, __int64 lParam) Line 1100   C++
Meeting Schedule Assistant.exe!CWnd::Default() Line 299 C++
Meeting Schedule Assistant.exe!CDialog::HandleInitDialog(unsigned __int64 __formal, __int64 __formal) Line 721  C++
Meeting Schedule Assistant.exe!CWnd::OnWndMsg(unsigned int message, unsigned __int64 wParam, __int64 lParam, __int64 * pResult) Line 2441   C++
Meeting Schedule Assistant.exe!CWnd::WindowProc(unsigned int message, unsigned __int64 wParam, __int64 lParam) Line 2099    C++
Meeting Schedule Assistant.exe!AfxCallWndProc(CWnd * pWnd, HWND__ * hWnd, unsigned int nMsg, unsigned __int64 wParam, __int64 lParam) Line 265  C++
Meeting Schedule Assistant.exe!AfxWndProc(HWND__ * hWnd, unsigned int nMsg, unsigned __int64 wParam, __int64 lParam) Line 418   C++
[External Code] 
Meeting Schedule Assistant.exe!IsolationAwareCreateDialogIndirectParamW(HINSTANCE__ * hInstance, const DLGTEMPLATE * lpTemplate, HWND__ * hWndParent, __int64(*)(HWND__ *, unsigned int, unsigned __int64, __int64) lpDialogFunc, __int64 dwInitParam) Line 569 C++
Meeting Schedule Assistant.exe!CWnd::CreateDlgIndirect(const DLGTEMPLATE * lpDialogTemplate, CWnd * pParentWnd, HINSTANCE__ * hInst) Line 358   C++
Meeting Schedule Assistant.exe!CWnd::CreateRunDlgIndirect(const DLGTEMPLATE * lpDialogTemplate, CWnd * pParentWnd, HINSTANCE__ * hInst) Line 460    C++
Meeting Schedule Assistant.exe!CDialog::DoModal() Line 633  C++
Meeting Schedule Assistant.exe!CMeetingScheduleAssistantApp::InitInstance() Line 251    C++
Meeting Schedule Assistant.exe!AfxWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 37  C++
Meeting Schedule Assistant.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 26    C++
[External Code] 

我的主 PNG 工具栏资源有 10 张图像。然而，我指定了以下代码：

info.m_uiColdResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiHotResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiLargeColdResID = IDB_PNG_MAIN_TOOLBAR;
info.m_uiLargeHotResID = IDB_PNG_MAIN_TOOLBAR;

我的工具栏图像是 320 x 32。

如何处理此异常？

Answer 1

我想我在这里遇到了答案。

CMFCToolBar::m_dblLargeImageRatio

指定大尺寸(高度或宽度(之间的比率 图像和常规图像的尺寸。

说明 默认比率为 2。您可以更改此值以使 大工具栏图像或大或小。

当您未指定一组 大图像。例如，如果您只提供一组小图像 尺寸为 16x16 并希望大图像的大小为 24x24，请设置 此数据成员为 1.5。

CMFCToolBar::m_dblLargeImageRatio = 1.0;