/****************************************************************************\
*            
*     FILE:     MDIChild.C
*
*     PURPOSE:  IconPro Project MDI Child Window handling c file
*
*     COMMENTS: This file contains the MDI Child Window handling code
*
*     FUNCTIONS:
*      EXPORTS: 
*               IconChildWndProc   - Window Procedure for the MDI children
*      LOCALS:
*               Draw3DRect         - Draws a rectangle using 3D colors
*               EraseBackground    - Draws the MDI child's background
*               CreateChildren     - Creates MDI child's child windows
*               CreateChildListBox - Creates and shows a list box
*               AddFormatDlgProc   - Dialog Proc for AddFormat dialog
*
*     Copyright 1995 Microsoft Corp.
*
*
* History:
*                July '95 - Created
*
\****************************************************************************/
#include <windows.h>
#include <commctrl.h>
#include "Icons.h"
#include "IconPro.h"
#include "Resource.h"
#include "MDIChild.H"


/****************************************************************************/
// External Globals
extern HINSTANCE    hInst;
extern HWND        	hWndMain, hMDIClientWnd;
/****************************************************************************/


/****************************************************************************/
// Prototypes for local functions
BOOL Draw3DRect( HDC hDC, RECT Rect, BOOL bSunken );
void EraseBackground( HWND hWnd, HDC hDC );
BOOL CreateChildren( HWND hWnd );
HWND CreateChildListBox( HWND hWndParent, UINT ID, LPRECT lpRect );
BOOL CALLBACK AddFormatDlgProc( HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam );
/****************************************************************************/



/****************************************************************************
*
*     FUNCTION: IconChildWndProc
*
*     PURPOSE:  Window Procedure for MDI child window
*
*     PARAMS:   HWND hWnd     - This window handle
*               UINT Msg      - Which Message?
*               WPARAM wParam - message parameter
*               LPARAM lParam - message parameter
*
*     RETURNS:  LRESULT - depends on message
*
* History:
*                July '95 - Created
*
\****************************************************************************/
LRESULT CALLBACK IconChildWndProc( HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam )
{
    // Which message is it?
    switch( Msg )
    {
        // User pressed left mouse button
        // Should be re-generate the AND mask?
        case WM_LBUTTONDOWN:
        {
            LPCHILDWINDOWDATA	lpcwd;

            // Get the icon resource data aassociated with this window
            if( (lpcwd = (LPCHILDWINDOWDATA)GetWindowLong( hWnd, GWL_USERDATA )) == NULL )
                break;

            // Do something only if the CNTRL key is pressed too
            if( MK_CONTROL & wParam )
            {
                POINTS	pts = MAKEPOINTS(lParam);
                POINT	pt;
                RECT    ImageRect;
                DWORD	nIndex;

                pt.x = pts.x; pt.y = pts.y;
                // Do we have some icon resource data?
                if( lpcwd->lpIR != NULL )
                {
                    // Which image is selected right now?
                    if( (nIndex = SendMessage( lpcwd->hWndFormatListBox, CB_GETCURSEL, 0, 0 )) != CB_ERR )
                    {
                        // Where is it drawn
                        ImageRect = GetXORImageRect( lpcwd->XORRect, &(lpcwd->lpIR->IconImages[nIndex]) );
                        // Is the mouse click in the image?
                        if( PtInRect( &ImageRect, pt ) )
                        {
                            HCURSOR	hOldCursor;

                            // This might take a while :(
                            hOldCursor = SetCursor( LoadCursor(NULL,IDC_WAIT) );
                            pt.x -= ImageRect.left;
                            pt.y -= ImageRect.top;
                            // generate the new AND mask
                            MakeNewANDMaskBasedOnPoint( &(lpcwd->lpIR->IconImages[nIndex]), pt );
                            // force a redraw
                            InvalidateRect( hWnd, NULL, TRUE );
                            //  Set changed flag
                            lpcwd->lpIR->bHasChanged = TRUE;
                            // finally, its over, put the cursor back
                            SetCursor( hOldCursor );
                        }
                    }
                }
            }
        }
        break; // End WM_LBUTTONDOWN

        // Time to say "Goodbye"
        case WM_CLOSE:
        {
            LPCHILDWINDOWDATA	lpcwd;
            TCHAR	szWindowTitle[MAX_PATH];

            // Get the data associated with this window
            lpcwd = (LPCHILDWINDOWDATA)GetWindowLong( hWnd, GWL_USERDATA );
            // Is there data associated with this window?
            if( lpcwd != NULL )
            {
                // Does the data include an icon resource
                if( lpcwd->lpIR != NULL )
                {
                    // Has the resource changed?
                    if( lpcwd->lpIR->bHasChanged )
                    {
                        // Get the title for the message box
                        GetWindowText( hWnd, szWindowTitle, MAX_PATH );
                        if( lstrlen( szWindowTitle ) < 1 )
                            lstrcpy( szWindowTitle, "UnKnown" );
                        // User want to save changes?
                        switch( MessageBox( hWnd, "Icon has Changed, Save Changes?", szWindowTitle, MB_ICONSTOP | MB_YESNOCANCEL ) )
                        {
                            case IDYES:
                                SendMessage( hWnd, WM_COMMAND, ID_FILE_SAVE, 0 );
                                // Fall through to IDNO and kill window
                            case IDNO:
                                DefMDIChildProc( hWnd, Msg, wParam, lParam );
                                return 0;
                            break;
                            case IDCANCEL:
                                return 1;
                            break;
                        }
                    }
                }
            }
            DefMDIChildProc( hWnd, Msg, wParam, lParam );
            return 0;
        }
        break; // End WM_CLOSE

        // We are being created
        case WM_CREATE:
        {
            LPCHILDWINDOWDATA	lpcwd;

            // Need new data for this new window
            lpcwd = malloc( sizeof( CHILDWINDOWDATA ) );
            SetWindowLong( hWnd, GWL_USERDATA, (LONG)lpcwd );
            lpcwd->lpIR = NULL;
            // If a resource was passed in, use it
            if( (LPVOID)lParam != NULL )
                lpcwd->lpIR = (LPICONRESOURCE)(((MDICREATESTRUCT *)(((CREATESTRUCT *)lParam)->lpCreateParams))->lParam);
            // If no resource was passed in, do minimal initialization
            if( lpcwd->lpIR == NULL )
            {
                lpcwd->lpIR = malloc(sizeof(ICONRESOURCE));
                lstrcpy( lpcwd->lpIR->szOriginalICOFileName, "Untitled" );
                lstrcpy( lpcwd->lpIR->szOriginalDLLFileName, "" );
                lpcwd->lpIR->nNumImages = 0;
            }
            // Nothing has changed
            lpcwd->lpIR->bHasChanged = FALSE;
            // Create the list box, etc
            CreateChildren( hWnd );
            return DefMDIChildProc( hWnd, Msg, wParam, lParam );
        }
        break; // End WM_CREATE

        // Won't let window get too small to show our main area
        case WM_GETMINMAXINFO:
        {
            LPMINMAXINFO    lpmmi = (LPMINMAXINFO)lParam;

            lpmmi->ptMinTrackSize.x = WINDOW_WIDTH;
            lpmmi->ptMinTrackSize.y = WINDOW_HEIGHT;
            return 0;
        }
        break; // End WM_GETMINMAXINFO

        // Yikes! We're being destroyed!
        case WM_DESTROY:
        {
            LPCHILDWINDOWDATA	lpcwd;

            // Get the data associated with this window 
            lpcwd = (LPCHILDWINDOWDATA)GetWindowLong( hWnd, GWL_USERDATA );
            // Is there some?
            if( lpcwd != NULL )
            {
                // Is there a resource?
                if( lpcwd->lpIR != NULL )
                {
                    UINT i;

                    // Free all the bits
                    for( i=0; i< lpcwd->lpIR->nNumImages; i++ )
                    {
                        if( lpcwd->lpIR->IconImages[i].lpBits != NULL )
                            free( lpcwd->lpIR->IconImages[i].lpBits );
                    }
                    free( lpcwd->lpIR );
                }
                free( lpcwd );
            }
            SetWindowLong( hWnd, GWL_USERDATA, 0 );
        }
        break; // End WM_DESTROY

        // Draw our background (white and black squares, etc)
        case WM_ERASEBKGND:
            EraseBackground( hWnd, (HDC)wParam );
            return 1;
        break; // End WM_ERASEBKGND

        // Ok, time to paint
        case WM_PAINT:
        {
            LPCHILDWINDOWDATA	lpcwd;
            HDC                	hDC;
            PAINTSTRUCT        	ps;
            DWORD            	nIndex;
            HICON            	hIcon = NULL;

            // Obligatory BeginPaint()
            hDC = BeginPaint( hWnd, &ps );
            // Get the data associated with this window
            lpcwd = (LPCHILDWINDOWDATA)GetWindowLong( hWnd, GWL_USERDATA );
            // Is there some?
            if( lpcwd != NULL )
            {
                // Is there a resource?
                if( lpcwd->lpIR != NULL )
                {
                    // Which image is selected?
                    if( (nIndex = SendMessage( lpcwd->hWndFormatListBox, CB_GETCURSEL, 0, 0 )) != CB_ERR )
                    {
                        int        	Width, Height;

                        // Get an HICON for the currently selected image
                        hIcon = MakeIconFromResource( &(lpcwd->lpIR->IconImages[nIndex]) );
                        // How big is the icon?
                        Width = lpcwd->lpIR->IconImages[nIndex].Width;
                        Height = lpcwd->lpIR->IconImages[nIndex].Height;
                        // Check to see if the icon is NULL
                        // If it is, consider it "unsupported"
                        // In the future, maybe we should look into MakeIconFromResource() and
                        // see why it is null - it may be for another reason than "unsupported"
                        if( hIcon == NULL )
                        {
                            SIZE    Size, Position;

                            // Draw some text in the black rect
                            SetTextColor( hDC, RGB(255,255,255) );