/*
Chat module plugin for Miranda IM

Copyright (C) 2003 Jörgen Persson
Copyright 2003-2009 Miranda ICQ/IM project,

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.
*/

// this color chooser window is inspired by PeaCow's smiley chooser window for the Smileyadd plugin

#include "../commonheaders.h"
#include "chat.h"
#include <math.h>

//globals, defined int main.cpp
extern HINSTANCE g_hInst;

static int CalculateCoordinatesToButton(COLORCHOOSER * pCC, POINT pt)
{
	int iSquareRoot = (int)sqrt(pCC->pModule->nColorCount);
	int nCols = iSquareRoot * iSquareRoot < pCC->pModule->nColorCount?iSquareRoot+1:iSquareRoot;

	int col = pt.x / 25;
	int row = (pt.y-20) / 20;
	int pos = nCols * row + col;

	if (pt.y < 20 && pos >= pCC->pModule->nColorCount)
		pos = -1;

	return pos;
}

static RECT CalculateButtonToCoordinates(COLORCHOOSER * pCC, int buttonPosition)
{
	RECT pt;
	int iSquareRoot = (int)sqrt(pCC->pModule->nColorCount);
	int nCols = iSquareRoot * iSquareRoot < pCC->pModule->nColorCount?iSquareRoot+1:iSquareRoot;

	int row = buttonPosition / nCols;
	int col = buttonPosition % nCols;

	pt.left = col * 25+1;
	pt.top = row * 20 + 20;
	pt.right = pt.left + 25-1;
	pt.bottom = pt.top + 20;

	return pt;
}

INT_PTR CALLBACK DlgProcColorToolWindow(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	static COLORCHOOSER* pCC = NULL;
	static int iCurrentHotTrack;
	static BOOL bChoosing;
	static int iRows;
	static int iColumns;
	static HWND hPreviousActiveWindow;

	switch(msg) {
	case WM_INITDIALOG:
	{
		RECT rc;
		int iSquareRoot;
		int width ;
		int height;

		TranslateDialogDefault(hwndDlg);
		pCC = (COLORCHOOSER*) lParam;

		iCurrentHotTrack = -2;
		bChoosing = FALSE;

		iSquareRoot = (int)sqrt(pCC->pModule->nColorCount);

		iColumns = iSquareRoot * iSquareRoot == pCC->pModule->nColorCount?iSquareRoot:iSquareRoot+1;
		iRows = iSquareRoot;

		rc.top = rc.left = 100;
		rc.right =  100 +  iColumns * 25 + 1;
		rc.bottom = iRows * 20 + 100 + 20;

		AdjustWindowRectEx(&rc, GetWindowLong(hwndDlg, GWL_STYLE), FALSE, GetWindowLong(hwndDlg, GWL_EXSTYLE));

		width = rc.right - rc.left;
		height = rc.bottom - rc.top;

		pCC->yPosition -= height;


		SetDlgItemText(hwndDlg, IDC_CHAT_COLORTEXT, pCC->bForeground?TranslateT("Text colour"):TranslateT("Background colour"));
		SetWindowPos(GetDlgItem(hwndDlg, IDC_CHAT_COLORTEXT), NULL,  0, 0, width, 20, 0);
		SetWindowPos(hwndDlg, NULL, pCC->xPosition, pCC->yPosition, width, height, SWP_SHOWWINDOW);
		}
		break;

	case WM_CTLCOLOREDIT:
	case WM_CTLCOLORSTATIC:
		if((HWND)lParam==GetDlgItem(hwndDlg,IDC_CHAT_COLORTEXT)) {
			SetTextColor((HDC)wParam,RGB(60,60,150));
			SetBkColor((HDC)wParam,GetSysColor(COLOR_WINDOW));
			return (INT_PTR)GetSysColorBrush(COLOR_WINDOW);
		}
		break;

	case WM_COMMAND:
		switch ( LOWORD( wParam )) {
 		case IDOK:
			if (iCurrentHotTrack >= 0)
			PostMessage(hwndDlg, WM_LBUTTONUP, 0, 0);
			break;
		case IDCANCEL:
			DestroyWindow(hwndDlg);
			break;
		}
		break;

	case WM_LBUTTONUP:
		if (iCurrentHotTrack >= 0 && iCurrentHotTrack < pCC->pModule->nColorCount && pCC->hWndTarget != NULL) {
			HWND hWindow;
			CHARFORMAT2 cf;
			cf.cbSize = sizeof(CHARFORMAT2);
			cf.dwMask = 0;
			cf.dwEffects = 0;
			hWindow = GetParent(pCC->hWndTarget);

			if ( pCC->bForeground ) {
				pCC->si->bFGSet = TRUE;
				pCC->si->iFG = iCurrentHotTrack;
				if ( IsDlgButtonChecked( hWindow, IDC_CHAT_COLOR )) {
					cf.dwMask = CFM_COLOR;
					cf.crTextColor = pCC->pModule->crColors[iCurrentHotTrack];
					if (pCC->pModule->bSingleFormat) {
						SendMessage(pCC->hWndTarget, EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
					} else {
						SendMessage(pCC->hWndTarget, EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf);
					}
				}
			}
			else {
				pCC->si->bBGSet = TRUE;
				pCC->si->iBG = iCurrentHotTrack;
				if(IsDlgButtonChecked(hWindow, IDC_CHAT_BKGCOLOR)) {
					cf.dwMask = CFM_BACKCOLOR;
					cf.crBackColor = pCC->pModule->crColors[iCurrentHotTrack];
					if (pCC->pModule->bSingleFormat) {
						SendMessage(pCC->hWndTarget, EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
					} else {
						SendMessage(pCC->hWndTarget, EM_SETCHARFORMAT, SCF_SELECTION, (LPARAM)&cf);
					}
				}
			}
		}
		PostMessage(hwndDlg, WM_CLOSE, 0, 0);
		break;

	case WM_ACTIVATE:
		if (wParam == WA_INACTIVE)
			PostMessage(hwndDlg, WM_CLOSE, 0, 0);
		else if ((wParam == WA_ACTIVE) || (wParam == WA_CLICKACTIVE))
			hPreviousActiveWindow = (HWND)lParam;
		break;

	case WM_MOUSEMOVE:
		{
			HDC hdc = GetDC(hwndDlg);
			POINT pt;
			RECT rect;
			int but;

			pt.x = LOWORD(lParam);
			pt.y = HIWORD(lParam);

			if (iCurrentHotTrack == -2)
				return 0; // prevent focussing when not drawn yet!

			but = CalculateCoordinatesToButton(pCC, pt);

			// weird stuff
			if (but != iCurrentHotTrack) {
				if (iCurrentHotTrack >= 0) {
					rect = CalculateButtonToCoordinates(pCC, iCurrentHotTrack);
					DrawFocusRect(hdc, &rect);
					iCurrentHotTrack = -1;
				}
				iCurrentHotTrack = but;

				if (iCurrentHotTrack >= 0) {
					rect = CalculateButtonToCoordinates(pCC, iCurrentHotTrack);
					DrawFocusRect(hdc, &rect);
				}
			}
			ReleaseDC(hwndDlg, hdc);
		}
		break;

	case WM_PAINT:
		{
		PAINTSTRUCT ps;
		HDC hdc;
		RECT rc;
		int i;
		int iThisRow = 1;
		int iThisColumn = 0;

		GetClientRect(hwndDlg, &rc);

		rc.top += 20;

		hdc = BeginPaint(hwndDlg, &ps);

		// fill background
		FillRect(hdc, &rc, GetSysColorBrush(COLOR_WINDOW));

		for (i=0; i < pCC->pModule->nColorCount; i++)
		{
			HBRUSH hbr;

			// decide place to draw the color block in the window
			iThisColumn ++;
				if (iThisColumn > iColumns) {
				iThisColumn = 1;
				iThisRow++;
			}

				if ( (pCC->bForeground && pCC->si->bFGSet && pCC->si->iFG == i) ||
					 (!pCC->bForeground && pCC->si->bBGSet && pCC->si->iBG == i) ) {
					rc.top = (iThisRow-1) * 20+ 1 +20 ;
					rc.left = (iThisColumn-1) * 25 + 1 + 1 ;
					rc.bottom = iThisRow * 20- 1 + 20 ;
					rc.right = iThisColumn * 25-1 ;

					DrawEdge(hdc, &rc, EDGE_RAISED, BF_TOP|BF_LEFT|BF_RIGHT|BF_BOTTOM);
				}

				rc.top = (iThisRow-1) * 20+ 3 +20 ;
				rc.left = (iThisColumn-1) * 25 + 3 + 1 ;
				rc.bottom = iThisRow * 20- 3 + 20 ;
				rc.right = iThisColumn * 25-3 ;

				FillRect(hdc, &rc, GetStockObject(BLACK_BRUSH));

				hbr = CreateSolidBrush(pCC->pModule->crColors[i]);

				rc.top = (iThisRow-1) * 20+4 +20;
				rc.left = (iThisColumn-1) * 25+ 4 + 1;
				rc.bottom = iThisRow * 20-4 + 20;
				rc.right = iThisColumn * 25-4;

				FillRect(hdc, &rc, hbr);
				DeleteObject(hbr);
			}

			EndPaint(hwndDlg, &ps);
			iCurrentHotTrack = -1;
		}
		break;

	case WM_CLOSE:
			SetFocus(pCC->hWndTarget);
			DestroyWindow(hwndDlg);
		break;

	case WM_DESTROY:
		mir_free( pCC );
		return TRUE;
	}

	return FALSE;
}
