//
// By adding this message handler, we may use CWnd::GetText()
//
LRESULT CCheckComboBox::OnGetText(WPARAM wParam, LPARAM lParam)
{
// Make sure the text is updated
RecalcText();
if (lParam == 0)
return 0;
// Copy the 'fake' window text
lstrcpyn((LPTSTR)lParam, m_strText, (INT)wParam);
return m_strText.GetLength();
}
LRESULT CCheckComboBox::OnGetText(WPARAM wParam, LPARAM lParam)
{
RecalcText();
if (lParam == 0)
return 0;
lstrcpyn((LPSTR)lParam, m_strText, (INT)wParam);
return m_strText.GetLength();
}
//
// By adding this message handler, we may use CWnd::GetTextLength()
//
LRESULT CCheckComboBox::OnGetTextLength(WPARAM, LPARAM)
{
// Make sure the text is updated
RecalcText();
return m_strText.GetLength();
}
void CCheckComboBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
HDC dc = lpDrawItemStruct->hDC;
CRect rcBitmap = lpDrawItemStruct->rcItem;
CRect rcText = lpDrawItemStruct->rcItem;
CString strText;
// 0 - No check, 1 - Empty check, 2 - Checked
INT nCheck = 0;
// Check if we are drawing the static portion of the combobox
if ((UINT(-1)) == lpDrawItemStruct->itemID || NULL == m_hListBox) {
// Make sure the m_strText member is updated
RecalcText();
// Get the text
strText = m_strText;
// Don't draw any boxes on this item
nCheck = 0;
}
// Otherwise it is one of the items
else
{
GetLBText(lpDrawItemStruct->itemID, strText);
nCheck = 1 + (GetCheck(lpDrawItemStruct->itemID));
TEXTMETRIC metrics = { 0 };
GetTextMetrics(dc, &metrics);
rcBitmap.left = 0;
rcBitmap.right = rcBitmap.left + metrics.tmHeight + metrics.tmExternalLeading + 6;
rcBitmap.top += 1;
rcBitmap.bottom -= 1;
rcText.left = rcBitmap.right;
}
if (nCheck > 0) {
SetBkColor(dc, GetSysColor(COLOR_WINDOW));
SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
UINT nState = DFCS_BUTTONCHECK;
if (nCheck > 1)
{
nState |= DFCS_CHECKED;
}
// Draw the checkmark using DrawFrameControl
DrawFrameControl(dc, rcBitmap, DFC_BUTTON, nState);
}
if (lpDrawItemStruct->itemState & ODS_SELECTED) {
SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
}
else {
SetBkColor(dc, GetSysColor(COLOR_WINDOW));
SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
}
// Erase and draw
ExtTextOut(dc, 0, 0, ETO_OPAQUE, &rcText, 0, 0, 0);
DrawText(dc, ' ' + strText, strText.GetLength() + 1, &rcText, DT_SINGLELINE|DT_VCENTER|DT_END_ELLIPSIS);
if ((lpDrawItemStruct->itemState & (ODS_FOCUS|ODS_SELECTED)) == (ODS_FOCUS|ODS_SELECTED))
DrawFocusRect(dc, &rcText);
}
LRESULT CCheckComboBox::OnGetTextLength(WPARAM, LPARAM)
{
RecalcText();
return m_strText.GetLength();
}
void CCheckComboBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
HDC dc = lpDrawItemStruct->hDC;
CRect rcBitmap = lpDrawItemStruct->rcItem;
CRect rcText = lpDrawItemStruct->rcItem;
CString strText;
INT nCheck = 0;
if ((LONG)lpDrawItemStruct->itemID < 0) {
RecalcText();
strText = m_strText;
nCheck = 0;
}
else {
GetLBText(lpDrawItemStruct->itemID, strText);
nCheck = 1 + (GetItemData(lpDrawItemStruct->itemID) != 0);
TEXTMETRIC metrics;
GetTextMetrics(dc, &metrics);
rcBitmap.left = 0;
rcBitmap.right = rcBitmap.left + metrics.tmHeight + metrics.tmExternalLeading + 6;
rcBitmap.top += 1;
rcBitmap.bottom -= 1;
rcText.left = rcBitmap.right;
}
if (nCheck > 0) {
SetBkColor(dc, GetSysColor(COLOR_WINDOW));
SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
UINT nState = DFCS_BUTTONCHECK;
if (nCheck > 1)
nState |= DFCS_CHECKED;
DrawFrameControl(dc, rcBitmap, DFC_BUTTON, nState);
}
if (lpDrawItemStruct->itemState & ODS_SELECTED) {
SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
}
else {
SetBkColor(dc, GetSysColor(COLOR_WINDOW));
SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
}
ExtTextOut(dc, 0, 0, ETO_OPAQUE, &rcText, 0, 0, 0);
DrawText(dc, ' ' + strText, strText.GetLength() + 1, &rcText, DT_SINGLELINE|DT_VCENTER|DT_END_ELLIPSIS);
if ((lpDrawItemStruct->itemState & (ODS_FOCUS|ODS_SELECTED)) == (ODS_FOCUS|ODS_SELECTED))
DrawFocusRect(dc, &rcText);
}
