workspace/plasma/shells/desktop/panelview_win.cpp

   1 /*
   2 *   This program is free software; you can redistribute it and/or modify
   3 *   it under the terms of the GNU Library General Public License version 2,
   4 *   or (at your option) any later version.
   5 *
   6 *   This program is distributed in the hope that it will be useful,
   7 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 *   GNU General Public License for more details
  10 *
  11 *   You should have received a copy of the GNU Library General Public
  12 *   License along with this program; if not, write to the
  13 *   Free Software Foundation, Inc.,
  14 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  15 */
  16
  17 #include "panelview.h"
  18
  19 #include <KDebug>
  20
  21 #include "panelcontroller.h"
  22
  23 #include <windows.h>
  24
  25 #define WM_APPBAR_CALLBACK ( WM_USER + 1010 )
  26
  27
  28 bool PanelView::registerAccessBar(bool fRegister)
  29 {
  30     if(fRegister) {
  31         setWindowFlags(Qt::Tool | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
  32         abd.cbSize = sizeof(APPBARDATA);
  33         abd.hWnd = (HWND)winId();
  34         abd.uCallbackMessage = WM_APPBAR_CALLBACK;
  35
  36         if(!SHAppBarMessage(ABM_NEW, &abd)) {
  37             kWarning() << "SHAppBarMessage( ABM_NEW ) failed";
  38             return false;
  39         }
  40
  41         switch (location()) {
  42             case Plasma::TopEdge:
  43                 abd.uEdge = ABE_TOP;
  44                 break;
  45
  46             case Plasma::BottomEdge:
  47                 abd.uEdge = ABE_BOTTOM;
  48                 break;
  49
  50             case Plasma::LeftEdge:
  51                 abd.uEdge = ABE_LEFT;
  52                 break;
  53
  54             case Plasma::RightEdge:
  55                 abd.uEdge = ABE_RIGHT;
  56                 break;
  57         }
  58
  59         //appBarPosChanged();
  60
  61     } else {
  62         SHAppBarMessage(ABM_REMOVE, &abd);
  63     }
  64     return true;
  65 }
  66
  67 bool PanelView::winEvent( MSG* msg, long* result )
  68 {
  69         *result = 0;
  70
  71         switch( msg->message )
  72         {
  73         case WM_APPBAR_CALLBACK:
  74                 appBarCallback( msg->wParam, msg->lParam );
  75             return true;
  76
  77         case WM_ACTIVATE:
  78                 SHAppBarMessage( ABM_ACTIVATE, &abd );
  79                 break;
  80
  81         case WM_WINDOWPOSCHANGED:
  82             SHAppBarMessage( ABM_WINDOWPOSCHANGED, &abd );
  83                 break;
  84
  85         default:
  86                 return false;
  87         }
  88
  89         return false;
  90 }
  91
  92 void PanelView::appBarCallback( WPARAM msg, LPARAM lParam )
  93 {
  94     uint uState;
  95     switch (msg) {
  96         case ABN_STATECHANGE:
  97             break;
  98
  99         case ABN_FULLSCREENAPP:
 100             uState = SHAppBarMessage(ABM_GETSTATE, &abd);
 101             if (lParam) {
 102                 SetWindowPos(winId(), (ABS_ALWAYSONTOP & uState) ? HWND_TOPMOST : HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
 103             } else if (uState & ABS_ALWAYSONTOP) {
 104                 SetWindowPos(winId(), HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
 105             }
 106             break;
 107
 108         case ABN_POSCHANGED:
 109             appBarPosChanged();
 110             break;
 111     }
 112 }
 113
 114 void PanelView::appBarPosChanged()
 115 {
 116     RECT rc;
 117
 118         // Get the area of the entire desktop
 119         rc.left = rc.top = 0;
 120         rc.right = GetSystemMetrics( SM_CXSCREEN );
 121         rc.bottom = GetSystemMetrics( SM_CYSCREEN );
 122
 123     switch (location()) {
 124         case Plasma::TopEdge:
 125             abd.uEdge = ABE_TOP;
 126             rc.bottom = rc.top + height();
 127             break;
 128
 129         case Plasma::BottomEdge:
 130             abd.uEdge = ABE_BOTTOM;
 131             rc.top = rc.bottom - height();
 132             break;
 133
 134         case Plasma::LeftEdge:
 135             abd.uEdge = ABE_LEFT;
 136             rc.right = rc.left + width();
 137             break;
 138
 139         case Plasma::RightEdge:
 140             abd.uEdge = ABE_RIGHT;
 141             rc.left = rc.right - width();
 142             break;
 143     }
 144
 145     appBarQuerySetPos(&rc);
 146 }
 147
 148 void PanelView::appBarQuerySetPos(LPRECT lprc)
 149 {
 150     int iHeight = 0;
 151     int iWidth = 0;
 152
 153     abd.rc = *lprc;
 154
 155     if ((abd.uEdge == ABE_LEFT) || (abd.uEdge == ABE_RIGHT)) {
 156         iWidth = abd.rc.right - abd.rc.left;
 157         abd.rc.top = y();
 158         abd.rc.bottom = y()+height();
 159     } else {
 160         iHeight = abd.rc.bottom - abd.rc.top;
 161         abd.rc.left = x();
 162         abd.rc.right = x()+width();
 163     }
 164
 165     // Query the system for an approved size and position.
 166     SHAppBarMessage(ABM_QUERYPOS, &abd);
 167
 168     // Adjust the rectangle, depending on the edge to which the
 169     // appbar is anchored.
 170     switch (abd.uEdge) {
 171         case ABE_LEFT:
 172             abd.rc.right = abd.rc.left + iWidth;
 173             break;
 174
 175         case ABE_RIGHT:
 176             abd.rc.left = abd.rc.right - iWidth;
 177             break;
 178
 179         case ABE_TOP:
 180             abd.rc.bottom = abd.rc.top + iHeight;
 181             break;
 182
 183         case ABE_BOTTOM:
 184             abd.rc.top = abd.rc.bottom - iHeight;
 185             break;
 186     }
 187
 188     // Pass the final bounding rectangle to the system.
 189     SHAppBarMessage(ABM_SETPOS, &abd);
 190
 191     // Move and size the appbar so that it conforms to the
 192     // bounding rectangle passed to the system.
 193     //MoveWindow(winId(), abd.rc.left, abd.rc.top, abd.rc.right - abd.rc.left, abd.rc.bottom - abd.rc.top, true);
 194 }