/*
 * astyle --force-indent=tab=4 --brackets=linux --indent-switches
 *		  --pad=oper --one-line=keep-blocks  --unpad=paren
 *
 * Miranda NG: the free IM client for Microsoft* Windows*
 *
 * Copyright 2000-2009 Miranda ICQ/IM project,
 * all portions of this codebase are copyrighted to the people
 * listed in contributors.txt.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * you should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * part of tabSRMM messaging plugin for Miranda.
 *
 * (C) 2005-2010 by silvercircle _at_ gmail _dot_ com and contributors
 *
 * $Id: TSButton.cpp 11848 2010-05-27 14:57:22Z silvercircle $
 *
 * A skinnable button class for tabSRMM.
 *
 */

#include "commonheaders.h"

#define PBS_PUSHDOWNPRESSED 6

static LRESULT CALLBACK TSButtonWndProc(HWND hwnd, UINT  msg, WPARAM wParam, LPARAM lParam);

// External theme methods and properties

static CRITICAL_SECTION csTips;
static HWND hwndToolTips = NULL;
static BLENDFUNCTION bf_buttonglyph;
static HDC hdc_buttonglyph = 0;
static HBITMAP hbm_buttonglyph, hbm_buttonglyph_old;

// Used for our own cheap TrackMouseEvent
#define BUTTON_POLLID       100
#define BUTTON_POLLDELAY    50

#define MGPROC(x) GetProcAddress(themeAPIHandle,x)

int TSAPI UnloadTSButtonModule()
{
	DeleteCriticalSection(&csTips);
	if (hdc_buttonglyph) {
		SelectObject(hdc_buttonglyph, hbm_buttonglyph_old);
		DeleteObject(hbm_buttonglyph);
		DeleteDC(hdc_buttonglyph);
	}
	return 0;
}

int TSAPI LoadTSButtonModule(void)
{
	WNDCLASSEX wc;

	ZeroMemory(&wc, sizeof(wc));
	wc.cbSize         = sizeof(wc);
	wc.lpszClassName  = _T("TSButtonClass");
	wc.lpfnWndProc    = TSButtonWndProc;
	wc.hCursor        = LoadCursor(NULL, IDC_ARROW);
	wc.cbWndExtra     = sizeof(MButtonCtrl*);
	wc.hbrBackground  = 0;
	wc.style          = CS_GLOBALCLASS | CS_PARENTDC;
	RegisterClassEx(&wc);
	InitializeCriticalSection(&csTips);
	return 0;
}

static void TSAPI DestroyTheme(MButtonCtrl *ctl)
{
	if (M.isVSAPIState()) {
		if (ctl->hThemeButton) {
			CMimAPI::m_pfnCloseThemeData(ctl->hThemeButton);
			ctl->hThemeButton = NULL;
		}
		if (ctl->hThemeToolbar) {
			CMimAPI::m_pfnCloseThemeData(ctl->hThemeToolbar);
			ctl->hThemeToolbar = NULL;
		}
	}
}

static void TSAPI LoadTheme(MButtonCtrl *ctl)
{
	if (M.isVSAPIState()) {
		DestroyTheme(ctl);
		ctl->hThemeButton = CMimAPI::m_pfnOpenThemeData(ctl->hwnd, L"BUTTON");
		ctl->hThemeToolbar = (M.isAero() || IsWinVerVistaPlus()) ? CMimAPI::m_pfnOpenThemeData(ctl->hwnd, L"MENU") : CMimAPI::m_pfnOpenThemeData(ctl->hwnd, L"TOOLBAR");
		ctl->bThemed = TRUE;
	}
}

int TSAPI TBStateConvert2Flat(int state)
{
	switch (state) {
		case PBS_NORMAL:
			return TS_NORMAL;
		case PBS_HOT:
			return TS_HOT;
		case PBS_PRESSED:
			return TS_PRESSED;
		case PBS_DISABLED:
			return TS_DISABLED;
		case PBS_DEFAULTED:
			return TS_NORMAL;
	}
	return TS_NORMAL;
}


/**
 * convert button state (hot, pressed, normal) to REBAR part state ids
 *
 * @param state  int: button state
 *
 * @return int: state item id
 */
int TSAPI RBStateConvert2Flat(int state)
{
	switch (state) {
		case PBS_NORMAL:
			return 1;
		case PBS_HOT:
			return 2;
		case PBS_PRESSED:
			return 3;
		case PBS_DISABLED:
			return 1;
		case PBS_DEFAULTED:
			return 1;
	}
	return 1;
}

static void PaintWorker(MButtonCtrl *ctl, HDC hdcPaint)
{
	if (hdc_buttonglyph == 0) {
		hdc_buttonglyph = CreateCompatibleDC(hdcPaint);
		hbm_buttonglyph = CreateCompatibleBitmap(hdcPaint, 16, 16);
		hbm_buttonglyph_old = (HBITMAP)SelectObject(hdc_buttonglyph, hbm_buttonglyph);
		bf_buttonglyph.BlendFlags = 0;
		bf_buttonglyph.SourceConstantAlpha = 120;
		bf_buttonglyph.BlendOp = AC_SRC_OVER;
		bf_buttonglyph.AlphaFormat = 0;
	}
	if (hdcPaint) {
		HDC 		hdcMem;
		HBITMAP 	hbmMem, hOld;
		RECT 		rcClient;
		RECT		rcContent;
		bool 		fAero = M.isAero();
		bool 		fVSThemed = (!CSkin::m_skinEnabled && M.isVSThemed());
		HANDLE 		hbp = 0;

		TWindowData *dat = (TWindowData*)GetWindowLongPtr(GetParent(ctl->hwnd), GWLP_USERDATA);
		GetClientRect(ctl->hwnd, const_cast<RECT *>(&rcClient));
		CopyRect(&rcContent, &rcClient);

		if (CMimAPI::m_haveBufferedPaint)
			hbp = CMimAPI::m_pfnBeginBufferedPaint(hdcPaint, &rcContent, BPBF_TOPDOWNDIB, NULL, &hdcMem);
		else {
			hdcMem = CreateCompatibleDC(hdcPaint);
			hbmMem = CreateCompatibleBitmap(hdcPaint, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top);
			hOld = (HBITMAP)SelectObject(hdcMem, hbmMem);
		}

		CSkin::FillBack(hdcMem, &rcContent);

		if (ctl->pushBtn && ctl->pbState)
			ctl->stateId = PBS_PRESSED;

		if (ctl->flatBtn) {
			if (ctl->pContainer && CSkin::m_skinEnabled) {
				CSkinItem *item, *realItem = 0;
				if (ctl->bTitleButton)
					item = &SkinItems[ctl->stateId == PBS_NORMAL ? ID_EXTBKTITLEBUTTON : (ctl->stateId == PBS_HOT ? ID_EXTBKTITLEBUTTONMOUSEOVER : ID_EXTBKTITLEBUTTONPRESSED)];
				else {
					item = &SkinItems[(ctl->stateId == PBS_NORMAL || ctl->stateId == PBS_DISABLED) ? ID_EXTBKBUTTONSNPRESSED : (ctl->stateId == PBS_HOT ? ID_EXTBKBUTTONSMOUSEOVER : ID_EXTBKBUTTONSPRESSED)];
					realItem = item;
				}
				CSkin::SkinDrawBG(ctl->hwnd, ctl->pContainer->hwnd,  ctl->pContainer, &rcContent, hdcMem);
				if (!item->IGNORED) {
					RECT rc1 = rcClient;
					rc1.left += item->MARGIN_LEFT;
					rc1.right -= item->MARGIN_RIGHT;
					rc1.top += item->MARGIN_TOP;
					rc1.bottom -= item->MARGIN_BOTTOM;
					CSkin::DrawItem(hdcMem, &rc1, item);
				} else
					goto flat_themed;
			} else {
flat_themed:
				int state = IsWindowEnabled(ctl->hwnd) ? (ctl->stateId == PBS_NORMAL && ctl->defbutton ? PBS_DEFAULTED : ctl->stateId) : PBS_DISABLED;

				if (ctl->bToolbarButton) {
					if (dat) {
						RECT	rcWin;
						GetWindowRect(ctl->hwnd, &rcWin);
						POINT 	pt;
						pt.x = rcWin.left;
						ScreenToClient(dat->hwnd, &pt);
						BitBlt(hdcMem, 0, 0, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top,
							   dat->pContainer->cachedToolbarDC, pt.x, 1, SRCCOPY);
					}
				}
				if (ctl->hThemeToolbar && ctl->bThemed && 1 == dat->pContainer->bTBRenderingMode) {
					if (fAero || PluginConfig.m_WinVerMajor >= 6)
						CMimAPI::m_pfnDrawThemeBackground(ctl->hThemeToolbar, hdcMem, 8, RBStateConvert2Flat(state), &rcClient, &rcClient);
					else
						CMimAPI::m_pfnDrawThemeBackground(ctl->hThemeToolbar, hdcMem, TP_BUTTON, TBStateConvert2Flat(state), &rcClient, &rcClient);
				} else {
					CSkin::m_switchBarItem->setAlphaFormat(AC_SRC_ALPHA, state == PBS_HOT ? 220 : 180);
					if (state == PBS_HOT || state == PBS_PRESSED) {
						if (state == PBS_PRESSED) {
							RECT	rc = rcClient;
							InflateRect(&rc, -1, -1);
							HBRUSH bBack = CreateSolidBrush(PluginConfig.m_tbBackgroundLow ? PluginConfig.m_tbBackgroundLow : GetSysColor(COLOR_3DDKSHADOW));
							FillRect(hdcMem, &rc, bBack);
							DeleteObject(bBack);
						}
						CSkin::m_switchBarItem->Render(hdcMem, &rcClient, true);
					}
				}
			}
		} else {
			if (ctl->pContainer && CSkin::m_skinEnabled) {
				CSkinItem *item, *realItem = 0;
				if (ctl->bTitleButton)
					item = &SkinItems[ctl->stateId == PBS_NORMAL ? ID_EXTBKTITLEBUTTON : (ctl->stateId == PBS_HOT ? ID_EXTBKTITLEBUTTONMOUSEOVER : ID_EXTBKTITLEBUTTONPRESSED)];
				else {
					item = &SkinItems[(ctl->stateId == PBS_NORMAL || ctl->stateId == PBS_DISABLED) ? ID_EXTBKBUTTONSNPRESSED : (ctl->stateId == PBS_HOT ? ID_EXTBKBUTTONSMOUSEOVER : ID_EXTBKBUTTONSPRESSED)];
					realItem = item;
				}
				CSkin::SkinDrawBG(ctl->hwnd, ctl->pContainer->hwnd,  ctl->pContainer, &rcClient, hdcMem);
				if (!item->IGNORED) {
					RECT rc1 = rcClient;
					rc1.left += item->MARGIN_LEFT;
					rc1.right -= item->MARGIN_RIGHT;
					rc1.top += item->MARGIN_TOP;
					rc1.bottom -= item->MARGIN_BOTTOM;
					CSkin::DrawItem(hdcMem, &rc1, item);
				} else
					goto nonflat_themed;
			} else {
nonflat_themed:
				int state = IsWindowEnabled(ctl->hwnd) ? (ctl->stateId == PBS_NORMAL && ctl->defbutton ? PBS_DEFAULTED : ctl->stateId) : PBS_DISABLED;

				if (ctl->hThemeButton && ctl->bThemed && 0 == PluginConfig.m_fillColor) {
					CMimAPI::m_pfnDrawThemeBackground(ctl->hThemeButton, hdcMem, BP_PUSHBUTTON, state, &rcClient, &rcClient);
					CMimAPI::m_pfnGetThemeBackgroundContentRect(ctl->hThemeToolbar, hdcMem, BP_PUSHBUTTON, PBS_NORMAL, &rcClient, &rcContent);
				} else {
					CSkin::m_switchBarItem->setAlphaFormat(AC_SRC_ALPHA, state == PBS_NORMAL ? 140 : 240);
					if (state == PBS_PRESSED) {
						RECT	rc = rcClient;
						InflateRect(&rc, -1, -1);
						HBRUSH bBack = CreateSolidBrush(PluginConfig.m_tbBackgroundLow ? PluginConfig.m_tbBackgroundLow : GetSysColor(COLOR_3DDKSHADOW));
						FillRect(hdcMem, &rc, bBack);
						DeleteObject(bBack);
					}
					CSkin::m_switchBarItem->Render(hdcMem, &rcClient, true);
				}

				// Draw focus rectangle if button has focus
				if (ctl->focus) {
					RECT focusRect = rcClient;
					InflateRect(&focusRect, -3, -3);
					DrawFocusRect(hdcMem, &focusRect);
				}
			}
		}

		/*
		 * render content
		 */
		if (ctl->arrow) {
			rcContent.top += 2;
			rcContent.bottom -= 2;
			rcContent.left = rcClient.right - 12;
			rcContent.right = rcContent.left;

			DrawIconEx(hdcMem, rcClient.right - 15, (rcClient.bottom - rcClient.top) / 2 - (PluginConfig.m_smcyicon / 2),
					   PluginConfig.g_buttonBarIcons[ICON_DEFAULT_PULLDOWN], 16, 16, 0, 0, DI_NORMAL);
		}

		if (ctl->hIcon || ctl->hIconPrivate) {
			int ix = (rcClient.right - rcClient.left) / 2 - 8;
			int iy = (rcClient.bottom - rcClient.top) / 2 - 8;
			HICON hIconNew = ctl->hIconPrivate != 0 ? ctl->hIconPrivate : ctl->hIcon;

			if (ctl->stateId == PBS_PRESSED) {
				ix++;
				iy++;
			}

			if (ctl->arrow)
				ix -= 4;

			if (ctl->dimmed && PluginConfig.m_IdleDetect)
				CSkin::DrawDimmedIcon(hdcMem, ix, iy, PluginConfig.m_smcxicon, PluginConfig.m_smcyicon, hIconNew, 180);
			else {
				if (ctl->stateId != PBS_DISABLED || CMimAPI::m_MyAlphaBlend == 0) {
					DrawIconEx(hdcMem, ix, iy, hIconNew, 16, 16, 0, 0, DI_NORMAL);
					if (ctl->overlay)
						DrawIconEx(hdcMem, ix, iy, ctl->overlay, 16, 16, 0, 0, DI_NORMAL);
				}
				else {
					BitBlt(hdc_buttonglyph, 0, 0, 16, 16, hdcMem, ix, iy, SRCCOPY);
					DrawIconEx(hdc_buttonglyph, 0, 0, hIconNew, 16, 16, 0, 0, DI_NORMAL);
					if (ctl->overlay)
						DrawIconEx(hdc_buttonglyph, 0, 0, ctl->overlay, 16, 16, 0, 0, DI_NORMAL);
 					CMimAPI::m_MyAlphaBlend(hdcMem, ix, iy, PluginConfig.m_smcxicon, PluginConfig.m_smcyicon, hdc_buttonglyph, 0, 0, 16, 16, bf_buttonglyph);
				}
			}
		} else if (GetWindowTextLength(ctl->hwnd)) {
			// Draw the text and optinally the arrow
			TCHAR szText[MAX_PATH];
			SIZE sz;
			RECT rcText;
			HFONT hOldFont;

			CopyRect(&rcText, &rcClient);
			GetWindowText(ctl->hwnd, szText, MAX_PATH - 1);
			SetBkMode(hdcMem, TRANSPARENT);
			hOldFont = (HFONT)SelectObject(hdcMem, ctl->hFont);
			if (ctl->pContainer && CSkin::m_skinEnabled)
				SetTextColor(hdcMem, IsWindowEnabled(ctl->hwnd) ? CSkin::m_DefaultFontColor : GetSysColor(COLOR_GRAYTEXT));
			else {
				if (PluginConfig.m_genericTxtColor)
					SetTextColor(hdcMem, PluginConfig.m_genericTxtColor);
				else
					SetTextColor(hdcMem, IsWindowEnabled(ctl->hwnd) || !ctl->hThemeButton ? GetSysColor(COLOR_BTNTEXT) : GetSysColor(COLOR_GRAYTEXT));
			}
			GetTextExtentPoint32(hdcMem, szText, lstrlen(szText), &sz);
			if (ctl->cHot) {
				SIZE szHot;

				GetTextExtentPoint32A(hdcMem, "&", 1, &szHot);
				sz.cx -= szHot.cx;
			}
			if (ctl->arrow)
				DrawState(hdcMem, NULL, NULL, (LPARAM)ctl->arrow, 0, rcClient.right - rcClient.left - 5 - PluginConfig.m_smcxicon + (!ctl->hThemeButton && ctl->stateId == PBS_PRESSED ? 1 : 0), (rcClient.bottom - rcClient.top) / 2 - PluginConfig.m_smcyicon / 2 + (!ctl->hThemeButton && ctl->stateId == PBS_PRESSED ? 1 : 0), PluginConfig.m_smcxicon, PluginConfig.m_smcyicon, IsWindowEnabled(ctl->hwnd) ? DST_ICON : DST_ICON | DSS_DISABLED);
			SelectObject(hdcMem, ctl->hFont);
			DrawState(hdcMem, NULL, NULL, (LPARAM)szText, lstrlen(szText), (rcText.right - rcText.left - sz.cx) / 2 + (!ctl->hThemeButton && ctl->stateId == PBS_PRESSED ? 1 : 0), ctl->hThemeButton ? (rcText.bottom - rcText.top - sz.cy) / 2 : (rcText.bottom - rcText.top - sz.cy) / 2 - (ctl->stateId == PBS_PRESSED ? 0 : 1), sz.cx, sz.cy, IsWindowEnabled(ctl->hwnd) || ctl->hThemeButton ? DST_PREFIXTEXT | DSS_NORMAL : DST_PREFIXTEXT | DSS_DISABLED);
			SelectObject(hdcMem, hOldFont);
		}
		if (hbp)
			CMimAPI::m_pfnEndBufferedPaint(hbp, TRUE);
		else {
			BitBlt(hdcPaint, 0, 0, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top, hdcMem, 0, 0, SRCCOPY);
			SelectObject(hdcMem, hOld);
			DeleteObject(hbmMem);
			DeleteDC(hdcMem);
		}

	}
}

static LRESULT CALLBACK TSButtonWndProc(HWND hwndDlg, UINT msg,  WPARAM wParam, LPARAM lParam)
{
	MButtonCtrl* bct = (MButtonCtrl *)GetWindowLongPtr(hwndDlg, 0);
	switch (msg) {
		case WM_NCCREATE: {
			SetWindowLongPtr(hwndDlg, GWL_STYLE, GetWindowLongPtr(hwndDlg, GWL_STYLE) | BS_OWNERDRAW);
			bct = (MButtonCtrl *)malloc(sizeof(MButtonCtrl));
			if (bct == NULL)
				return FALSE;
			ZeroMemory(bct, sizeof(MButtonCtrl));
			bct->hwnd = hwndDlg;
			bct->stateId = PBS_NORMAL;
			bct->hFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
			LoadTheme(bct);
			SetWindowLongPtr(hwndDlg, 0, (LONG_PTR)bct);
			if (((CREATESTRUCT *)lParam)->lpszName)
				SetWindowText(hwndDlg, ((CREATESTRUCT *)lParam)->lpszName);
			return TRUE;
		}
		case WM_DESTROY: {
			if (bct) {
				EnterCriticalSection(&csTips);
				if (hwndToolTips) {
					TOOLINFO ti;

					ZeroMemory(&ti, sizeof(ti));
					ti.cbSize = sizeof(ti);
					ti.uFlags = TTF_IDISHWND;
					ti.hwnd = bct->hwnd;
					ti.uId = (UINT_PTR)bct->hwnd;
					if (SendMessage(hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti)) {
						SendMessage(hwndToolTips, TTM_DELTOOL, 0, (LPARAM)&ti);
					}
					if (SendMessage(hwndToolTips, TTM_GETTOOLCOUNT, 0, (LPARAM)&ti) == 0) {
						DestroyWindow(hwndToolTips);
						hwndToolTips = NULL;
					}
				}
				if (bct->hIconPrivate)
					DestroyIcon(bct->hIconPrivate);
				LeaveCriticalSection(&csTips);
				DestroyTheme(bct);
			}
			break;	// DONT! fall thru
		}

		case WM_NCDESTROY:
			free(bct);
			SetWindowLongPtr(hwndDlg, 0, (LONG_PTR)NULL);
			break;

		case WM_SETTEXT: {
			bct->cHot = 0;
			if ((TCHAR *)lParam) {
				TCHAR *tmp = (TCHAR *)lParam;
				while (*tmp) {
					if (*tmp == (TCHAR)'&' && *(tmp + 1)) {
						bct->cHot = _totlower(*(tmp + 1));
						break;
					}
					tmp++;
				}
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}
		case WM_KEYUP:
			if (bct->stateId != PBS_DISABLED && wParam == VK_SPACE && !(GetKeyState(VK_CONTROL) & 0x8000) && !(GetKeyState(VK_SHIFT) & 0x8000)) {
				if (bct->pushBtn) {
					if (bct->pbState) bct->pbState = 0;
					else bct->pbState = 1;
					InvalidateRect(bct->hwnd, NULL, TRUE);
				}
				SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(GetDlgCtrlID(hwndDlg), BN_CLICKED), (LPARAM)hwndDlg);
				return 0;
			}
			break;
		case WM_SYSKEYUP:
			if (bct->stateId != PBS_DISABLED && bct->cHot && bct->cHot == tolower((int)wParam)) {
				if (bct->pushBtn) {
					if (bct->pbState) bct->pbState = 0;
					else bct->pbState = 1;
					InvalidateRect(bct->hwnd, NULL, TRUE);
				}
				SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(GetDlgCtrlID(hwndDlg), BN_CLICKED), (LPARAM)hwndDlg);
				return 0;
			}
			break;
		case WM_THEMECHANGED: {
			// themed changed, reload theme object
			if (bct->bThemed)
				LoadTheme(bct);
			InvalidateRect(bct->hwnd, NULL, TRUE); // repaint it
			break;
		}
		case WM_SETFONT: { // remember the font so we can use it later
			bct->hFont = (HFONT)wParam; // maybe we should redraw?
			break;
		}
		case WM_NCPAINT:
			return 0;

		case WM_PAINT: {
			PAINTSTRUCT ps;
			HDC hdcPaint;

			hdcPaint = BeginPaint(hwndDlg, &ps);
			if (hdcPaint) {
				if (bct->sitem)
					bct->sitem->RenderThis(hdcPaint);
				else
					PaintWorker(bct, hdcPaint);
				EndPaint(hwndDlg, &ps);
			}
			return 0;
		}
		case BM_SETIMAGE:
			if (wParam == IMAGE_ICON) {
				ICONINFO ii;
				BITMAP bm;

				if (bct->hIconPrivate)
					DestroyIcon(bct->hIconPrivate);

				GetIconInfo((HICON)lParam, &ii);
				GetObject(ii.hbmColor, sizeof(bm), &bm);
				if (bm.bmWidth != PluginConfig.m_smcxicon || bm.bmHeight != PluginConfig.m_smcyicon) {
					HIMAGELIST hImageList;
					hImageList = ImageList_Create(PluginConfig.m_smcxicon, PluginConfig.m_smcyicon, PluginConfig.m_bIsXP ? ILC_COLOR32 | ILC_MASK : ILC_COLOR16 | ILC_MASK, 1, 0);
					ImageList_AddIcon(hImageList, (HICON)lParam);
					bct->hIconPrivate = ImageList_GetIcon(hImageList, 0, ILD_NORMAL);
					ImageList_RemoveAll(hImageList);
					ImageList_Destroy(hImageList);
					bct->hIcon = 0;
				} else {
					bct->hIcon = (HICON)lParam;
					bct->hIconPrivate = 0;
				}

				DeleteObject(ii.hbmMask);
				DeleteObject(ii.hbmColor);
				bct->hBitmap = NULL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			} else if (wParam == IMAGE_BITMAP) {
				bct->hBitmap = (HBITMAP)lParam;
				if (bct->hIconPrivate)
					DestroyIcon(bct->hIconPrivate);
				bct->hIcon = bct->hIconPrivate = NULL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		case BM_SETCHECK:
			if (!bct->pushBtn) break;
			if (wParam == BST_CHECKED) {
				bct->pbState = 1;
				bct->stateId = PBS_PRESSED;
			} else if (wParam == BST_UNCHECKED) {
				bct->pbState = 0;
				bct->stateId = PBS_NORMAL;
			}
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BM_GETCHECK:
			if (bct->pushBtn) {
				return bct->pbState ? BST_CHECKED : BST_UNCHECKED;
			}
			return 0;
		case BUTTONSETARROW: // turn arrow on/off
			bct->arrow = (HICON)wParam;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETDEFAULT:
			bct->defbutton = (wParam != 0);
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETASPUSHBTN:
			bct->pushBtn = (wParam != 0);
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETASFLATBTN:
			bct->flatBtn = (wParam != 0);
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case BUTTONSETASTHEMEDBTN:
			bct->bThemed = (wParam != 0);
			break;
		case BUTTONSETASDIMMED:
			bct->dimmed = (wParam != 0);
			break;
		case BUTTONSETCONTAINER:
			bct->pContainer = (TContainerData *)wParam;
			break;
		case BUTTONSETASTITLE:
			bct->bTitleButton = TRUE;
			break;
		case BUTTONSETASNORMAL:
			bct->stateId = (wParam) ? PBS_NORMAL : PBS_DISABLED;
			InvalidateRect(bct->hwnd, NULL, FALSE);
			break;
		case BUTTONGETSTATEID:
			return bct->stateId;
		case BUTTONSETASTOOLBARBUTTON:
			bct->bToolbarButton = wParam;
			break;
		case BUTTONSETASSIDEBARBUTTON:
			bct->sitem = reinterpret_cast<CSideBarButton *>(wParam);
			break;
		case BUTTONSETOVERLAYICON:
			bct->overlay = (HICON)wParam;
			break;
		case BUTTONADDTOOLTIP: {
			TOOLINFO ti;

			if (!(char*)wParam)
				break;
			EnterCriticalSection(&csTips);
			if (!hwndToolTips) {
				hwndToolTips = CreateWindowEx(WS_EX_TOPMOST, TOOLTIPS_CLASS, _T(""), WS_POPUP, 0, 0, 0, 0, NULL, NULL, GetModuleHandle(NULL), NULL);
			}
			ZeroMemory(&ti, sizeof(ti));
			ti.cbSize = sizeof(ti);
			ti.uFlags = TTF_IDISHWND;
			ti.hwnd = bct->hwnd;
			ti.uId = (UINT_PTR)bct->hwnd;
			if (SendMessage(hwndToolTips, TTM_GETTOOLINFO, 0, (LPARAM)&ti)) {
				SendMessage(hwndToolTips, TTM_DELTOOL, 0, (LPARAM)&ti);
			}
			ti.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
			ti.uId = (UINT_PTR)bct->hwnd;
			ti.lpszText = (TCHAR *)wParam;
			SendMessage(hwndToolTips, TTM_ADDTOOL, 0, (LPARAM)&ti);
			SendMessage(hwndToolTips, TTM_SETMAXTIPWIDTH, 0, 300);
			LeaveCriticalSection(&csTips);
			break;
		}
		case WM_SETFOCUS: // set keybord focus and redraw
			bct->focus = 1;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case WM_KILLFOCUS: // kill focus and redraw
			bct->focus = 0;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		case WM_ENABLE: { // windows tells us to enable/disable
			bct->stateId = wParam ? PBS_NORMAL : PBS_DISABLED;
			InvalidateRect(bct->hwnd, NULL, TRUE);
			break;
		}
		case WM_MOUSELEAVE: { // faked by the WM_TIMER
			if (bct->stateId != PBS_DISABLED) { // don't change states if disabled
				bct->stateId = PBS_NORMAL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}

		case WM_CONTEXTMENU:
			if (bct->sitem)
				bct->sitem->invokeContextMenu();
			break;

		case WM_MBUTTONUP:
			if (bct->sitem) {
				if (bct->sitem->getDat())
					SendMessage(bct->sitem->getDat()->hwnd, WM_CLOSE, 1, 0);
			}
			break;

		case WM_LBUTTONDOWN: {
			RECT rc;

			if (bct->sitem) {
				if (bct->sitem->testCloseButton() != -1)
					return TRUE;
				bct->stateId = PBS_PRESSED;
				InvalidateRect(bct->hwnd, NULL, TRUE);
				bct->sitem->activateSession();
			}

			if (bct->arrow) {
				GetClientRect(bct->hwnd, &rc);
				if (LOWORD(lParam) < rc.right - 12 && bct->stateId != PBS_DISABLED)
					bct->stateId = PBS_PRESSED;
				else if (LOWORD(lParam) > rc.right - 12) {
					if (GetDlgCtrlID(hwndDlg) == IDOK || bct->stateId != PBS_DISABLED) {
						WORD w = (WORD)((int)bct->arrow & 0x0000ffff);
						SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(w, BN_CLICKED), (LPARAM)hwndDlg);
					}
				}
				InvalidateRect(bct->hwnd, NULL, TRUE);
			} else if (bct->stateId != PBS_DISABLED) {
				bct->stateId = PBS_PRESSED;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			break;
		}
		case WM_LBUTTONUP: {
			int  showClick = 0;

			if (bct->sitem) {
				if (bct->sitem->testCloseButton() != -1) {
					SendMessage(bct->sitem->getDat()->hwnd, WM_CLOSE, 1, 0);
					return TRUE;
				}
			}
			if (bct->pushBtn) {
				if (bct->pbState) bct->pbState = 0;
				else bct->pbState = 1;
			}
			if (bct->stateId != PBS_DISABLED) { // don't change states if disabled
				if (bct->stateId == PBS_PRESSED)
					showClick = 1;
				if (msg == WM_LBUTTONUP)
					bct->stateId = PBS_HOT;
				else
					bct->stateId = PBS_NORMAL;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			if (showClick)
		          SendMessage(GetParent(hwndDlg), WM_COMMAND, MAKELONG(GetDlgCtrlID(hwndDlg), BN_CLICKED), (LPARAM)hwndDlg);
			break;
		}
		case WM_MOUSEMOVE:
			if (bct->stateId == PBS_NORMAL) {
				bct->stateId = PBS_HOT;
				InvalidateRect(bct->hwnd, NULL, TRUE);
			} else if (bct->arrow && bct->stateId == PBS_HOT) {
				InvalidateRect(bct->hwnd, NULL, TRUE);
			}
			// Call timer, used to start cheesy TrackMouseEvent faker
			SetTimer(hwndDlg, BUTTON_POLLID, BUTTON_POLLDELAY, NULL);
			if (bct->sitem) {
				if (bct->sitem->testCloseButton() != -1) {
					if (bct->sitem->m_sideBar->getHoveredClose() != bct->sitem) {
						bct->sitem->m_sideBar->setHoveredClose(bct->sitem);
						InvalidateRect(hwndDlg, 0, FALSE);
					}
				}
				else {
					bct->sitem->m_sideBar->setHoveredClose(0);
					InvalidateRect(hwndDlg, 0, FALSE);
				}
			}
			break;
		case WM_TIMER: { // use a timer to check if they have did a mouseout
			if (wParam == BUTTON_POLLID) {
				RECT rc;
				POINT pt;
				GetWindowRect(hwndDlg, &rc);
				GetCursorPos(&pt);
				if (!PtInRect(&rc, pt)) { // mouse must be gone, trigger mouse leave
					PostMessage(hwndDlg, WM_MOUSELEAVE, 0, 0L);
					KillTimer(hwndDlg, BUTTON_POLLID);
					if (bct->sitem) {
						bct->sitem->m_sideBar->setHoveredClose(0);
						InvalidateRect(hwndDlg, 0, FALSE);
					}
				}
			}
			break;
		}
		case WM_ERASEBKGND:
			return 1;
	}
	return DefWindowProc(hwndDlg, msg, wParam, lParam);
}