CListCtrl_Sortable.cpp

#include "stdafx.h"

#include "CListCtrl_Sortable.h"
#include "Resource.h"

#include <shlwapi.h>

BEGIN_MESSAGE_MAP(CListCtrl_Sortable, CListCtrl_LabelTip)
	ON_NOTIFY_REFLECT_EX(LVN_COLUMNCLICK, OnHeaderClick)	// Column Click
END_MESSAGE_MAP()

namespace {
	bool IsThemeEnabled()
	{
		HMODULE hinstDll;
		bool XPStyle = false;
		bool (__stdcall *pIsAppThemed)();
		bool (__stdcall *pIsThemeActive)();

		// Test if operating system has themes enabled
		hinstDll = ::LoadLibrary(_T("UxTheme.dll"));
		if (hinstDll)
		{
			(FARPROC&)pIsAppThemed = ::GetProcAddress(hinstDll, "IsAppThemed");
			(FARPROC&)pIsThemeActive = ::GetProcAddress(hinstDll,"IsThemeActive");
			::FreeLibrary(hinstDll);
			if (pIsAppThemed != NULL && pIsThemeActive != NULL)
			{
				if (pIsAppThemed() && pIsThemeActive())
				{
					// Test if application has themes enabled by loading the proper DLL
					hinstDll = LoadLibrary(_T("comctl32.dll"));
					if (hinstDll)
					{
						DLLGETVERSIONPROC pDllGetVersion = (DLLGETVERSIONPROC)::GetProcAddress(hinstDll, "DllGetVersion");
						::FreeLibrary(hinstDll);
						if (pDllGetVersion != NULL)
						{
							DLLVERSIONINFO dvi;
							ZeroMemory(&dvi, sizeof(dvi));
							dvi.cbSize = sizeof(dvi);
							HRESULT hRes = pDllGetVersion ((DLLVERSIONINFO *) &dvi);
							if (SUCCEEDED(hRes))
                                XPStyle = dvi.dwMajorVersion >= 6;
						}
					}
				}
			}
		}
		return XPStyle;
	}

	LRESULT EnableWindowTheme(HWND hwnd, LPCWSTR app, LPCWSTR idlist)
	{
		HMODULE hinstDll;
		HRESULT (__stdcall *pSetWindowTheme)(HWND hwnd, LPCWSTR pszSubAppName, LPCWSTR pszSubIdList);
		HANDLE (__stdcall *pOpenThemeData)(HWND hwnd, LPCWSTR pszClassList);
		HRESULT (__stdcall *pCloseThemeData)(HANDLE hTheme);

		hinstDll = ::LoadLibrary(_T("UxTheme.dll"));
		if (hinstDll)
		{
			(FARPROC&)pOpenThemeData = ::GetProcAddress(hinstDll, "OpenThemeData");
			(FARPROC&)pCloseThemeData = ::GetProcAddress(hinstDll, "CloseThemeData");
			(FARPROC&)pSetWindowTheme = ::GetProcAddress(hinstDll, "SetWindowTheme");
			::FreeLibrary(hinstDll);
			if (pSetWindowTheme && pOpenThemeData && pCloseThemeData)
			{
				HANDLE theme = pOpenThemeData(hwnd,L"ListView");
				if (theme!=NULL)
				{
					VERIFY(pCloseThemeData(theme)==S_OK);
					return pSetWindowTheme(hwnd, app, idlist);
				}
			}
		}
		return S_FALSE;
	}
}

BOOL CListCtrl_Sortable::OnHeaderClick(NMHDR* pNMHDR, LRESULT* pResult)
{
	NMLISTVIEW* pLV = reinterpret_cast<NMLISTVIEW*>(pNMHDR);

	SetFocus();	// Ensure other controls gets kill-focus

	int colIndex = pLV->iSubItem;

	if (m_SortCol==colIndex)
	{
		m_Ascending = !m_Ascending;
	}
	else
	{
		m_SortCol = colIndex;
		m_Ascending = true;
	}

	if (SortColumn(m_SortCol, m_Ascending))
		SetSortArrow(m_SortCol, m_Ascending);

	return FALSE;	// Let parent-dialog get chance
}

void CListCtrl_Sortable::SetSortArrow(int colIndex, bool ascending)
{
	if (IsThemeEnabled())
	{
#if (_WIN32_WINNT >= 0x501)
		for(int i = 0; i < GetHeaderCtrl()->GetItemCount(); ++i)
		{
			HDITEM hditem = {0};
			hditem.mask = HDI_FORMAT;
			VERIFY( GetHeaderCtrl()->GetItem( i, &hditem ) );
			hditem.fmt &= ~(HDF_SORTDOWN|HDF_SORTUP);
			if (i == colIndex)
			{
				hditem.fmt |= ascending ? HDF_SORTUP : HDF_SORTDOWN;
			}
			VERIFY( CListCtrl_LabelTip::GetHeaderCtrl()->SetItem( i, &hditem ) );
		}
#endif
	}
	else
	{
		UINT bitmapID = m_Ascending ? IDB_UPARROW : IDB_DOWNARROW; 
		for(int i = 0; i < GetHeaderCtrl()->GetItemCount(); ++i)
		{
			HDITEM hditem = {0};
			hditem.mask = HDI_BITMAP | HDI_FORMAT;
			VERIFY( GetHeaderCtrl()->GetItem( i, &hditem ) );
			if (hditem.fmt & HDF_BITMAP && hditem.fmt & HDF_BITMAP_ON_RIGHT)
			{
				if (hditem.hbm)
				{
					DeleteObject(hditem.hbm);
					hditem.hbm = NULL;
				}
				hditem.fmt &= ~(HDF_BITMAP|HDF_BITMAP_ON_RIGHT);
				VERIFY( CListCtrl_LabelTip::GetHeaderCtrl()->SetItem( i, &hditem ) );
			}
			if (i == colIndex)
			{
				hditem.fmt |= HDF_BITMAP|HDF_BITMAP_ON_RIGHT;
				hditem.hbm = (HBITMAP)LoadImage(GetModuleHandle(NULL), MAKEINTRESOURCE(bitmapID), IMAGE_BITMAP, 0,0, LR_LOADMAP3DCOLORS); 
				VERIFY( hditem.hbm!=NULL );
				VERIFY( CListCtrl_LabelTip::GetHeaderCtrl()->SetItem( i, &hditem ) );
			}
		}
	}
}

void CListCtrl_Sortable::PreSubclassWindow()
{
	CListCtrl_LabelTip::PreSubclassWindow();

	// Focus retangle is not painted properly without double-buffering
#if (_WIN32_WINNT >= 0x501)
	SetExtendedStyle(LVS_EX_DOUBLEBUFFER | GetExtendedStyle());
#endif
	SetExtendedStyle(GetExtendedStyle() | LVS_EX_FULLROWSELECT);
	SetExtendedStyle(GetExtendedStyle() | LVS_EX_HEADERDRAGDROP);

	EnableWindowTheme(GetSafeHwnd(), L"Explorer", NULL);
}

void CListCtrl_Sortable::ResetSortOrder()
{
	m_Ascending = true;
	m_SortCol = -1;
	SetSortArrow(m_SortCol, m_Ascending);
}

// The column version of GetItemData(), one can specify an unique
// identifier when using InsertColumn()
int CListCtrl_Sortable::GetColumnData(int col) const
{
	LVCOLUMN lvc = {0};
	lvc.mask = LVCF_SUBITEM;
	VERIFY( GetColumn(col, &lvc) );
	return lvc.iSubItem;
}

void CListCtrl_Sortable::SetSortColumn(int columnIndex, bool ascending)
{
	m_SortCol = columnIndex;
	m_Ascending = ascending;
	if (SortColumn(m_SortCol, m_Ascending)) {
		SetSortArrow(m_SortCol, m_Ascending);
	}
}