IE Drop-Down Button

• Download DropButton.zip - 90.2 KB

Introduction

This sampls how to add a drop-down arrow button of Internet Explorer.

regsvr32 debug/dropbutton.dll

Using the code

LRESULT CIEToolbarWnd::OnCheckButton(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (m_isIE7)
{
return DefWindowProc(uMsg, wParam, lParam);
}

if (m_ParentWnd.GetButtonID() == (int)wParam)
{
BrowserWndInfo *pInfo = m_ParentWnd.GetBrowserWndInfo();

if (pInfo != NULL)
{
if (pInfo->nButtonState == TBSTATE_CHECKED)
{
lParam = MAKELONG(TRUE, 0);
}
else
{
lParam = MAKELONG(FALSE, 0);
}
}
}
}

LRESULT CIEToolbarWnd::OnAddString(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
{
LRESULT lResult = DefWindowProc(uMsg, wParam, lParam);

if (m_isIE7)
{
return lResult;
}

if ((int)wParam == 0)
{
LPWSTR strButtonText = (LPWSTR)lParam;
if (_tcscmp(BUTTON_NAME, strButtonText) == 0)
{
m_buttonStrIndex = lResult;
}
}
return lResult;
}


LRESULT CIEToolbarWnd::OnAddButton(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
{
LRESULT lResult = DefWindowProc(uMsg, wParam, lParam);

if (m_isIE7)
{
return lResult;
}

int nButtons = (int)wParam;
LPTBBUTTON pButtons = (LPTBBUTTON)lParam;
for (int i = 0; i < nButtons; i++)
{
if (pButtons[i].iString == m_buttonStrIndex)
{
m_ParentWnd.SetButtonID(pButtons[i].idCommand);

m_ParentWnd.NotifySetButtonInfo(pButtons[i].idCommand);
}
}
return lResult;
}

LRESULT CIEToolbarWnd::OnSetButtonInfo(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
{
int iID = (int) wParam;
LPTBBUTTONINFO lptbbi = (LPTBBUTTONINFO)lParam;

int ButtonID = m_ParentWnd.GetButtonID();
if (ButtonID == -1)
{
if (lptbbi->pszText != NULL && wcscmp(lptbbi->pszText, L"DropButton") == 0)
{
ButtonID = iID;
m_ParentWnd.SetButtonID(ButtonID);
}
}
if (ButtonID == iID)
{
lptbbi->dwMask = lptbbi->dwMask | TBIF_STYLE | TBSTYLE_CHECK| TBIF_STATE;
lptbbi->fsStyle = lptbbi->fsStyle|BTNS_DROPDOWN |BTNS_CHECK;
BrowserWndInfo* pInfo = m_ParentWnd.GetBrowserWndInfo();
if (pInfo != NULL && pInfo->nButtonState == TBSTATE_CHECKED)
{
lptbbi->dwMask = lptbbi->dwMask | TBIF_STYLE | TBSTYLE_CHECK| TBIF_STATE;
lptbbi->fsStyle = lptbbi->fsStyle|BTNS_DROPDOWN |BTNS_CHECK;
lptbbi->fsState = TBSTATE_ENABLED|TBSTATE_CHECKED;
}
else
{
lptbbi->dwMask = lptbbi->dwMask | TBIF_STYLE | TBSTYLE_CHECK| TBIF_STATE;
lptbbi->fsStyle = lptbbi->fsStyle|BTNS_DROPDOWN |BTNS_CHECK;
lptbbi->fsState = TBSTATE_ENABLED;
}
}
return DefWindowProc(uMsg, wParam, lParam);
}

void CIEToolbarWnd::SubclassToolbar(IWebBrowser2 *pWB)
{
if (pWB == NULL)
{
return;
}

long hWnd = NULL;
pWB->get_HWND(&hWnd);

int nViewCount = m_arrayBrowserWndInfo.GetSize();

BrowserWndInfo *pBrowserWndInfo = new BrowserWndInfo;

if (pBrowserWndInfo == NULL)
{
return;
}
pBrowserWndInfo->pWebBrowser = pWB;
pBrowserWndInfo->nButtonState = 0;
pBrowserWndInfo->hBrowserWnd = (HWND)hWnd;
m_arrayBrowserWndInfo.Add(pBrowserWndInfo);

if (m_ParentWnd.GetBrowserWndInfo() == NULL)
{
m_ParentWnd.SetBrowserWndInfo(pBrowserWndInfo);
}

if (nViewCount > 0)
{
return;
}

HWND hToolbarWnd = NULL;

if (m_isIE7)
{
ie7SubclassToolbar((HWND)hWnd);
}
else
{
normalSubclassToolbar((HWND)hWnd);
}
}

void CIEToolbarWnd::UnsubclassToolbar(IWebBrowser2 *pWebBrowser)
{
BrowserWndInfo* pBrowseWndInfo = findBrowserWndInfo(pWebBrowser);

if (pBrowseWndInfo != NULL)
{
m_arrayBrowserWndInfo.Remove(pBrowseWndInfo);
m_ParentWnd.SetBrowserWndInfo(NULL);
}

if (m_arrayBrowserWndInfo.GetSize() == 0)
{
if (m_hWnd)
{
UnsubclassWindow();
}
if (m_ParentWnd.m_hWnd)
{
m_ParentWnd.UnsubclassWindow();
}
}

if (pBrowseWndInfo != NULL)
{
delete pBrowseWndInfo;
}
}

void CIEToolbarWnd::SetCurrentBrowserWnd(IWebBrowser2 *pWebBrowser)
{
if (pWebBrowser == NULL)
{
return;
}
BrowserWndInfo* pBrowseWndInfo = findBrowserWndInfo(pWebBrowser);
m_ParentWnd.SetBrowserWndInfo(pBrowseWndInfo);
}


void CIEToolbarWnd::IsIE7(BOOL isIE7)
{
m_isIE7 = isIE7;
}

BOOL CIEToolbarWnd::ie7SubclassToolbar(HWND hBrowserWnd)
{
HWND hCmdbarWnd = FindWindowEx(hBrowserWnd, NULL, L"CommandBarClass", NULL);
if (hCmdbarWnd)
{
HWND hRebarWnd = FindWindowEx(hCmdbarWnd, NULL, L"ReBarWindow32", NULL);

HWND hToolbarWnd = ::GetDlgItem(hRebarWnd, 0x0000A000);

if (hToolbarWnd != NULL)
{
m_ParentWnd.SetToolbarWnd(hToolbarWnd);

SubclassWindow(hToolbarWnd);

m_ParentWnd.SubclassWindow(hCmdbarWnd);

return TRUE;
}
}
return FALSE;
}

BOOL CIEToolbarWnd::normalSubclassToolbar(HWND hBrowserWnd)
{
HWND hCmdbarWnd = ::GetDlgItem(hBrowserWnd, 0x0000A005);

if (hCmdbarWnd)
{
HWND hRebarWnd = FindWindowEx(hCmdbarWnd, NULL, L"ReBarWindow32", NULL);

if (hRebarWnd)
{
HWND hToolbarWnd = ::GetDlgItem(hRebarWnd, 0x0000A000);
if (hToolbarWnd != NULL)
{
m_ParentWnd.SetToolbarWnd(hToolbarWnd);
SubclassWindow(hToolbarWnd);
m_ParentWnd.SubclassWindow(hCmdbarWnd);
return TRUE;
}
}
}
return FALSE;
}

Points of Interest

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History

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