BOOL OnKeyDown()

in setupgui/windows/TabCtrl.cpp [177:279]

• 99 lines of code
• 19 McCabe index (conditional complexity)

BOOL OnKeyDown(LPARAM lParam)
{
	BOOL verticalTabs;
	TC_KEYDOWN *tk=(TC_KEYDOWN *)lParam;
	int itemCount=TabCtrl_GetItemCount(tk->hdr.hwndFrom);
	int currentSel=TabCtrl_GetCurSel(tk->hdr.hwndFrom);

	if(itemCount <= 1) return FALSE; // Ignore if only one TabPage

	verticalTabs= GetWindowLongPtr(This->hTab, GWL_STYLE) & TCS_VERTICAL;

	if(verticalTabs)
	{
		switch (tk->wVKey)
		{
			case VK_PRIOR: //select the previous page
			{
				if(0==currentSel) return TRUE;
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel-1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom,currentSel-1);
			}
			return TRUE;
			case VK_UP: //select the previous page
			{
				if(0==currentSel) return TRUE;
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel-1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom, currentSel);
			}
			return TRUE;
			case VK_NEXT:  //select the next page
			{
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel+1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom, currentSel+1);
			}
			return TRUE;
			case VK_DOWN: //select the next page
			{
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel+1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom,currentSel);
			}
			return TRUE;
			case VK_LEFT: //navagate within selected child tab page
			{
				SetFocus(This->hTabPages[currentSel]); // focus to child tab page
				TabPageMessageLoop (This->hTabPages[currentSel]); //start message loop
			}
			return TRUE;
			case VK_RIGHT: //navagate within selected child tab page
			{
				SetFocus(This->hTabPages[currentSel]);
				TabPageMessageLoop (This->hTabPages[currentSel]);
			}
			return TRUE;
			default: return FALSE;
		}
	} // if(verticalTabs)

	else // horizontal Tabs
    {
		switch (tk->wVKey)
		{
			case VK_NEXT: //select the previous page
			{
				if(0==currentSel) return TRUE;
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel-1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom, currentSel-1);
			}
			return TRUE;
			case VK_LEFT: //select the previous page
			{
				if(0==currentSel) return TRUE;
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel-1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom, currentSel);
			}
			return TRUE;
			case VK_PRIOR: //select the next page
			{
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel+1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom,currentSel+1);
			}
			return TRUE;
			case VK_RIGHT: //select the next page
			{
				TabCtrl_SetCurSel(tk->hdr.hwndFrom, currentSel+1);
				TabCtrl_SetCurFocus(tk->hdr.hwndFrom,currentSel);
			}
			return TRUE;
			case VK_UP: //navagate within selected child tab page
			{
				SetFocus(This->hTabPages[currentSel]);
				TabPageMessageLoop (This->hTabPages[currentSel]);
			}
			return TRUE;
			case VK_DOWN: //navagate within selected child tab page
			{
				SetFocus(This->hTabPages[currentSel]);
				TabPageMessageLoop (This->hTabPages[currentSel]);
			}
			return TRUE;
			default: return FALSE;
		}
	} //else // horizontal Tabs
}