desktopbar.cpp

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/*
 * Copyright 2003, 2004 Martin Fuchs
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */


 //
 // Explorer clone
 //
 // desktopbar.cpp
 //
 // Martin Fuchs, 22.08.2003
 //


#include <precomp.h>

#include "../resource.h"

#include "desktopbar.h"
#include "taskbar.h"
#include "startmenu.h"
#include "traynotify.h"
#include "quicklaunch.h"

#include "../dialogs/settings.h"


DesktopBar::DesktopBar(HWND hwnd)
 :  super(hwnd),
#ifdef __REACTOS__
    _trayIcon(hwnd, ID_TRAY_VOLUME)
#else
    WM_TASKBARCREATED(RegisterWindowMessage(WINMSG_TASKBARCREATED))
#endif
{
    SetWindowIcon(hwnd, IDI_REACTOS);

    SystemParametersInfo(SPI_GETWORKAREA, 0, &_work_area_org, 0);
}

DesktopBar::~DesktopBar()
{
     // restore work area to the previous size
    SystemParametersInfo(SPI_SETWORKAREA, 0, &_work_area_org, 0);
    PostMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETWORKAREA, 0);

     // exit application after destroying desktop window
    PostQuitMessage(0);
}


HWND DesktopBar::Create()
{
    static BtnWindowClass wcDesktopBar(CLASSNAME_EXPLORERBAR);

    RECT rect;

    rect.left = -2; // hide left border
#ifdef TASKBAR_AT_TOP
    rect.top = -2;  // hide top border
#else
    rect.top = GetSystemMetrics(SM_CYSCREEN) - DESKTOPBARBAR_HEIGHT;
#endif
    rect.right = GetSystemMetrics(SM_CXSCREEN) + 2;
    rect.bottom = rect.top + DESKTOPBARBAR_HEIGHT + 2;

    return Window::Create(WINDOW_CREATOR(DesktopBar), WS_EX_PALETTEWINDOW,
                            wcDesktopBar, TITLE_EXPLORERBAR,
                            WS_POPUP|WS_THICKFRAME|WS_CLIPCHILDREN|WS_VISIBLE,
                            rect.left, rect.top, rect.right-rect.left, rect.bottom-rect.top, 0);
}


LRESULT DesktopBar::Init(LPCREATESTRUCT pcs)
{
    if (super::Init(pcs))
        return 1;

     // create start button
    ResString start_str(IDS_START);
    WindowCanvas canvas(_hwnd);
    FontSelection font(canvas, GetStockFont(ANSI_VAR_FONT));
    RECT rect = {0, 0};
    DrawText(canvas, start_str, -1, &rect, DT_SINGLELINE|DT_CALCRECT);
    int start_btn_width = rect.right+16+8;

    _taskbar_pos = start_btn_width + 6;

     // create "Start" button
    HWND hwndStart = Button(_hwnd, start_str, 1, 1, start_btn_width, REBARBAND_HEIGHT, IDC_START, WS_VISIBLE|WS_CHILD|BS_OWNERDRAW);
    SetWindowFont(hwndStart, GetStockFont(ANSI_VAR_FONT), FALSE);
    new StartButton(hwndStart);

    /* Save the handle to the window, needed for push-state handling */
    _hwndStartButton = hwndStart;

     // disable double clicks
    SetClassLongPtr(hwndStart, GCL_STYLE, GetClassLongPtr(hwndStart, GCL_STYLE) & ~CS_DBLCLKS);

     // create task bar
    _hwndTaskBar = TaskBar::Create(_hwnd);

#ifndef __MINGW32__ // SHRestricted() missing in MinGW (as of 29.10.2003)
    if (!g_Globals._SHRestricted || !SHRestricted(REST_NOTRAYITEMSDISPLAY))
#endif
         // create tray notification area
        _hwndNotify = NotifyArea::Create(_hwnd);


     // notify all top level windows about the successfully created desktop bar
     //@@ Use SendMessage() instead of PostMessage() to avoid problems with delayed created shell service objects?
    PostMessage(HWND_BROADCAST, WM_TASKBARCREATED, 0, 0);


    _hwndQuickLaunch = QuickLaunchBar::Create(_hwnd);

     // create rebar window to manage task and quick launch bar
#ifndef _NO_REBAR
    _hwndrebar = CreateWindowEx(WS_EX_TOOLWINDOW, REBARCLASSNAME, NULL,
                    WS_CHILD|WS_VISIBLE|WS_CLIPSIBLINGS|WS_CLIPCHILDREN|
                    RBS_VARHEIGHT|RBS_AUTOSIZE|RBS_DBLCLKTOGGLE|    //|RBS_REGISTERDROP
                    CCS_NODIVIDER|CCS_NOPARENTALIGN|CCS_TOP,
                    0, 0, 0, 0, _hwnd, 0, g_Globals._hInstance, 0);

    REBARBANDINFO rbBand;

    rbBand.cbSize = sizeof(REBARBANDINFO);
    rbBand.fMask  = RBBIM_TEXT|RBBIM_STYLE|RBBIM_CHILD|RBBIM_CHILDSIZE|RBBIM_SIZE|RBBIM_ID|RBBIM_IDEALSIZE;
    rbBand.cyChild = REBARBAND_HEIGHT;
    rbBand.cyMaxChild = (ULONG)-1;
    rbBand.cyMinChild = REBARBAND_HEIGHT;
    rbBand.cyIntegral = REBARBAND_HEIGHT + 3;   //@@ OK?
    rbBand.fStyle = RBBS_VARIABLEHEIGHT|RBBS_GRIPPERALWAYS|RBBS_HIDETITLE;

    TCHAR QuickLaunchBand[] = _T("Quicklaunch");
    rbBand.lpText = QuickLaunchBand;
    rbBand.hwndChild = _hwndQuickLaunch;
    rbBand.cx = 100;
    rbBand.cxMinChild = 100;
    rbBand.wID = IDW_QUICKLAUNCHBAR;
    SendMessage(_hwndrebar, RB_INSERTBAND, (WPARAM)-1, (LPARAM)&rbBand);

    TCHAR TaskbarBand[] = _T("Taskbar");
    rbBand.lpText = TaskbarBand;
    rbBand.hwndChild = _hwndTaskBar;
    rbBand.cx = 200;    //pcs->cx-_taskbar_pos-quicklaunch_width-(notifyarea_width+1);
    rbBand.cxMinChild = 50;
    rbBand.wID = IDW_TASKTOOLBAR;
    SendMessage(_hwndrebar, RB_INSERTBAND, (WPARAM)-1, (LPARAM)&rbBand);
#endif


    RegisterHotkeys();

     // prepare Startmenu, but hide it for now
    _startMenuRoot = GET_WINDOW(StartMenuRoot, StartMenuRoot::Create(_hwndStartButton, STARTMENUROOT_ICON_SIZE));
    _startMenuRoot->_hwndStartButton = _hwndStartButton;

    return 0;
}


StartButton::StartButton(HWND hwnd)
 :  PictureButton(hwnd, SmallIcon(IDI_STARTMENU), GetSysColorBrush(COLOR_BTNFACE))
{
}

LRESULT StartButton::WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam)
{
    switch(nmsg) {
       // one click activation: handle button-down message, don't wait for button-up
      case WM_LBUTTONDOWN:
        if (!Button_GetState(_hwnd)) {
            Button_SetState(_hwnd, TRUE);

            SetCapture(_hwnd);

            SendMessage(GetParent(_hwnd), WM_COMMAND, MAKEWPARAM(GetDlgCtrlID(_hwnd),0), 0);
        }

        Button_SetState(_hwnd, FALSE);
        break;

       // re-target mouse move messages while moving the mouse cursor through the start menu
      case WM_MOUSEMOVE:
        if (GetCapture() == _hwnd) {
            POINT pt = {GET_X_LPARAM(lparam), GET_Y_LPARAM(lparam)};

            ClientToScreen(_hwnd, &pt);
            HWND hwnd = WindowFromPoint(pt);

            if (hwnd && hwnd!=_hwnd) {
                ScreenToClient(hwnd, &pt);
                SendMessage(hwnd, WM_MOUSEMOVE, 0, MAKELPARAM(pt.x, pt.y));
            }
        }
        break;

      case WM_LBUTTONUP:
        if (GetCapture() == _hwnd) {
            ReleaseCapture();

            POINT pt = {GET_X_LPARAM(lparam), GET_Y_LPARAM(lparam)};

            ClientToScreen(_hwnd, &pt);
            HWND hwnd = WindowFromPoint(pt);

            if (hwnd && hwnd!=_hwnd) {
                ScreenToClient(hwnd, &pt);
                PostMessage(hwnd, WM_LBUTTONDOWN, 0, MAKELPARAM(pt.x, pt.y));
                PostMessage(hwnd, WM_LBUTTONUP, 0, MAKELPARAM(pt.x, pt.y));
            }
        }
        break;

      case WM_CANCELMODE:
        ReleaseCapture();
        break;

      default:
        return super::WndProc(nmsg, wparam, lparam);
    }

    return 0;
}


void DesktopBar::RegisterHotkeys()
{
     // register hotkey WIN+E opening explorer
    RegisterHotKey(_hwnd, IDHK_EXPLORER, MOD_WIN, 'E');
    RegisterHotKey(_hwnd, IDHK_RUN, MOD_WIN, 'R');
    RegisterHotKey(_hwnd, IDHK_DESKTOP, MOD_WIN, 'D');
    RegisterHotKey(_hwnd, IDHK_LOGOFF, MOD_WIN, 'L');
    RegisterHotKey(_hwnd, IDHK_STARTMENU, MOD_CONTROL, VK_ESCAPE);

}

void DesktopBar::ProcessHotKey(int id_hotkey)
{
    switch(id_hotkey) {
        case IDHK_EXPLORER:
            explorer_show_frame(SW_SHOWNORMAL);
            break;

        case IDHK_RUN:
            _startMenuRoot->Command(IDC_LAUNCH, 0);
            break;

        case IDHK_LOGOFF:
            _startMenuRoot->Command(IDC_LOGOFF, 0);
            break;

        case IDHK_DESKTOP:
            g_Globals._desktops.ToggleMinimize();
            break;

        case IDHK_STARTMENU:
            ShowOrHideStartMenu();
            break;
    }
}


LRESULT DesktopBar::WndProc(UINT nmsg, WPARAM wparam, LPARAM lparam)
{
    switch(nmsg) {
      case WM_NCHITTEST: {
        LRESULT res = super::WndProc(nmsg, wparam, lparam);

        if (res>=HTSIZEFIRST && res<=HTSIZELAST) {
#ifdef TASKBAR_AT_TOP
            if (res == HTBOTTOM)    // enable vertical resizing at the lower border
#else
            if (res == HTTOP)       // enable vertical resizing at the upper border
#endif
                return res;
            else
                return HTCLIENT;    // disable any other resizing
        }
        return res;}

      case WM_SYSCOMMAND:
        if ((wparam&0xFFF0) == SC_SIZE) {
#ifdef TASKBAR_AT_TOP
            if (wparam == SC_SIZE+6)// enable vertical resizing at the lower border
#else
            if (wparam == SC_SIZE+3)// enable vertical resizing at the upper border
#endif
                goto def;
            else
                return 0;           // disable any other resizing
        } else if (wparam == SC_TASKLIST)
            ShowOrHideStartMenu();
        goto def;

      case WM_SIZE:
        Resize(LOWORD(lparam), HIWORD(lparam));
        break;

      case WM_SIZING:
        ControlResize(wparam, lparam);
        break;

      case PM_RESIZE_CHILDREN: {
        ClientRect size(_hwnd);
        Resize(size.right, size.bottom);
        break;}

      case WM_CLOSE:
        ShowExitWindowsDialog(_hwnd);
        break;

      case WM_HOTKEY:
        ProcessHotKey(wparam);
        break;

      case WM_COPYDATA:
        return ProcessCopyData((COPYDATASTRUCT*)lparam);

      case WM_CONTEXTMENU: {
        POINTS p;
        p.x = LOWORD(lparam);
        p.y = HIWORD(lparam);
        PopupMenu menu(IDM_DESKTOPBAR);
        SetMenuDefaultItem(menu, 0, MF_BYPOSITION);
        menu.TrackPopupMenu(_hwnd, p);
        break;}

      case PM_GET_LAST_ACTIVE:
        if (_hwndTaskBar)
            return SendMessage(_hwndTaskBar, nmsg, wparam, lparam);
        break;

      case PM_REFRESH_CONFIG:   
        SendMessage(_hwndNotify, PM_REFRESH_CONFIG, 0, 0);
        break;

      case WM_TIMER:
        if (wparam == ID_TRAY_VOLUME) {
            KillTimer(_hwnd, wparam);
            launch_file(_hwnd, TEXT("sndvol32.exe"), SW_SHOWNORMAL, TEXT("-t"));    // launch volume control in small mode
        }
        break;

      case PM_GET_NOTIFYAREA:
        return (LRESULT)(HWND)_hwndNotify;

      case WM_SYSCOLORCHANGE:
        /* Forward WM_SYSCOLORCHANGE to common controls */
#ifndef _NO_REBAR
        SendMessage(_hwndrebar, WM_SYSCOLORCHANGE, 0, 0);
#endif
        SendMessage(_hwndQuickLaunch, WM_SYSCOLORCHANGE, 0, 0);
        SendMessage(_hwndTaskBar, WM_SYSCOLORCHANGE, 0, 0);
        break;

      default: def:
        return super::WndProc(nmsg, wparam, lparam);
    }

    return 0;
}

int DesktopBar::Notify(int id, NMHDR* pnmh)
{
    if (pnmh->code == RBN_CHILDSIZE) {
        /* align the task bands to the top, so it's in row with the Start button */
        NMREBARCHILDSIZE* childSize = (NMREBARCHILDSIZE*)pnmh;

        if (childSize->wID == IDW_TASKTOOLBAR) {
            int cy = childSize->rcChild.top - childSize->rcBand.top;

            if (cy) {
                childSize->rcChild.bottom -= cy;
                childSize->rcChild.top -= cy;
            }
        }
    }

    return 0;
}

void DesktopBar::Resize(int cx, int cy)
{
    int quicklaunch_width = SendMessage(_hwndQuickLaunch, PM_GET_WIDTH, 0, 0);
    int notifyarea_width = SendMessage(_hwndNotify, PM_GET_WIDTH, 0, 0);

    HDWP hdwp = BeginDeferWindowPos(3);

    if (_hwndrebar)
        DeferWindowPos(hdwp, _hwndrebar, 0, _taskbar_pos, 1, cx-_taskbar_pos-(notifyarea_width+1), cy-2, SWP_NOZORDER|SWP_NOACTIVATE);
    else {
        if (_hwndQuickLaunch)
            DeferWindowPos(hdwp, _hwndQuickLaunch, 0, _taskbar_pos, 1, quicklaunch_width, cy-2, SWP_NOZORDER|SWP_NOACTIVATE);

        if (_hwndTaskBar)
            DeferWindowPos(hdwp, _hwndTaskBar, 0, _taskbar_pos+quicklaunch_width, 0, cx-_taskbar_pos-quicklaunch_width-(notifyarea_width+1), cy, SWP_NOZORDER|SWP_NOACTIVATE);
    }

    if (_hwndNotify)
        DeferWindowPos(hdwp, _hwndNotify, 0, cx-(notifyarea_width+1), 1, notifyarea_width, cy-2, SWP_NOZORDER|SWP_NOACTIVATE);

    EndDeferWindowPos(hdwp);

    WindowRect rect(_hwnd);
    RECT work_area = {0, 0, GetSystemMetrics(SM_CXSCREEN), rect.top};
    SystemParametersInfo(SPI_SETWORKAREA, 0, &work_area, 0);    // don't use SPIF_SENDCHANGE because then we have to wait for any message being delivered
    PostMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETWORKAREA, 0);
}


int DesktopBar::Command(int id, int code)
{
    switch(id) {
      case IDC_START:
        ShowOrHideStartMenu();
        break;

      case ID_ABOUT_EXPLORER:
        explorer_about(g_Globals._hwndDesktop);
        break;

      case ID_DESKTOPBAR_SETTINGS:
        ExplorerPropertySheet(g_Globals._hwndDesktop);
        break;

      case ID_MINIMIZE_ALL:
        g_Globals._desktops.ToggleMinimize();
        break;

      case ID_EXPLORE:
        explorer_show_frame(SW_SHOWNORMAL);
        break;

      case ID_TASKMGR:
        launch_file(_hwnd, TEXT("taskmgr.exe"), SW_SHOWNORMAL);
        break;

      case ID_SWITCH_DESKTOP_1:
      case ID_SWITCH_DESKTOP_1+1: {
        int desktop_idx = id - ID_SWITCH_DESKTOP_1;

        g_Globals._desktops.SwitchToDesktop(desktop_idx);

        if (_hwndQuickLaunch)
            PostMessage(_hwndQuickLaunch, PM_UPDATE_DESKTOP, desktop_idx, 0);
        break;}

#ifdef __REACTOS__
      case ID_TRAY_VOLUME:
        launch_file(_hwnd, TEXT("sndvol32.exe"), SW_SHOWNORMAL);    // launch volume control application
        break;

      case ID_VOLUME_PROPERTIES:
        launch_cpanel(_hwnd, TEXT("mmsys.cpl"));
        break;
#endif

      default:
        if (_hwndQuickLaunch)
            return SendMessage(_hwndQuickLaunch, WM_COMMAND, MAKEWPARAM(id,code), 0);
        else
            return 1;
    }

    return 0;
}


void DesktopBar::ShowOrHideStartMenu()
{
    if (_startMenuRoot)
    {
        // set the Button, if not set
        if (!Button_GetState(_hwndStartButton))
            Button_SetState(_hwndStartButton, TRUE);

        if (_startMenuRoot->IsStartMenuVisible())
            _startMenuRoot->CloseStartMenu();
        else
            _startMenuRoot->TrackStartmenu();

        // StartMenu was closed, release button state
        Button_SetState(_hwndStartButton, false);
    }
}


struct TrayNotifyCDS {
    DWORD   cookie;
    DWORD   notify_code;
    NOTIFYICONDATA nicon_data;
};

LRESULT DesktopBar::ProcessCopyData(COPYDATASTRUCT* pcd)
{
     // Is this a tray notification message?
    if (pcd->dwData == 1) {
        TrayNotifyCDS* ptr = (TrayNotifyCDS*) pcd->lpData;

        NotifyArea* notify_area = GET_WINDOW(NotifyArea, _hwndNotify);

        if (notify_area)
            return notify_area->ProcessTrayNotification(ptr->notify_code, &ptr->nicon_data);
    }

    return FALSE;
}


void DesktopBar::ControlResize(WPARAM wparam, LPARAM lparam)
{
    PRECT dragRect = (PRECT) lparam;
    //int screenWidth = GetSystemMetrics(SM_CXSCREEN);
    int screenHeight = GetSystemMetrics(SM_CYSCREEN);


    switch(wparam) {
      case WMSZ_BOTTOM: 
        break;

      case WMSZ_TOP:    // Taskbar is at the bottom of the screen
        dragRect->top = screenHeight - (((screenHeight - dragRect->top) + DESKTOPBARBAR_HEIGHT/2) / DESKTOPBARBAR_HEIGHT) * DESKTOPBARBAR_HEIGHT;
        if (dragRect->top < screenHeight / 2)
            dragRect->top = screenHeight - (screenHeight/2 / DESKTOPBARBAR_HEIGHT * DESKTOPBARBAR_HEIGHT);
        else if (dragRect->top > screenHeight - 5)
            dragRect->top = screenHeight - 5;
        break;

      case WMSZ_RIGHT:  
        break;

      case WMSZ_LEFT:   
        break;
    }
}


#ifdef __REACTOS__

void DesktopBar::AddTrayIcons()
{
    _trayIcon.Add(SmallIcon(IDI_SPEAKER), ResString(IDS_VOLUME));
}

void DesktopBar::TrayClick(UINT id, int btn)
{
    switch(id) {
      case ID_TRAY_VOLUME:
        if (btn == TRAYBUTTON_LEFT)
            SetTimer(_hwnd, ID_TRAY_VOLUME, 500, NULL); // wait a bit to correctly handle double clicks
        else {
            PopupMenu menu(IDM_VOLUME);
            SetMenuDefaultItem(menu, 0, MF_BYPOSITION);
            menu.TrackPopupMenuAtPos(_hwnd, GetMessagePos());
        }
        break;
    }
}

void DesktopBar::TrayDblClick(UINT id, int btn)
{
    switch(id) {
      case ID_TRAY_VOLUME:
        KillTimer(_hwnd, ID_TRAY_VOLUME);   // finish one-click timer
        launch_file(_hwnd, TEXT("sndvol32.exe"), SW_SHOWNORMAL);    // launch volume control application
        break;
    }
}

#endif