qtgui/openc2eview.cpp

   1 /*
   2     This program is free software; you can redistribute it and/or modify
   3     it under the terms of the GNU General Public License as published by
   4     the Free Software Foundation; either version 2 of the License, or
   5     (at your option) any later version.
   6
   7     This program is distributed in the hope that it will be useful,
   8     but WITHOUT ANY WARRANTY; without even the implied warranty of
   9     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10     GNU General Public License for more details.
  11
  12     You should have received a copy of the GNU General Public License along
  13     with this program; if not, write to the Free Software Foundation, Inc.,
  14     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  15 */
  16
  17 #include "World.h"
  18 #include "MetaRoom.h"
  19 #include "openc2eview.h"
  20 #include <QtGui>
  21 #include "QtBackend.h"
  22
  23 #ifdef _WIN32
  24 #include <windows.h>
  25 #endif
  26
  27 /*
  28  * TODO:
  29  *
  30  * provide input to the game engine
  31  * non-X11 support
  32  * provide a resize event to the engine as needed
  33  *
  34  */
  35
  36 openc2eView::openc2eView(QWidget *parent, boost::shared_ptr<QtBackend> b) : QAbstractScrollArea(parent) {
  37         backend = b;
  38
  39         viewport()->setAttribute(Qt::WA_PaintOnScreen); // disable double-buffering
  40         viewport()->setAttribute(Qt::WA_OpaquePaintEvent); // no need for Qt to draw a background
  41
  42         // keyboard focus. needed? better way?
  43         setFocusPolicy(Qt::StrongFocus);
  44
  45         // we need the mouse move events
  46         setMouseTracking(true);
  47
  48         // TODO: sane? do we really need relx/rely, anyway?
  49         lastmousex = mapFromGlobal(QCursor::pos()).x();
  50         lastmousey = mapFromGlobal(QCursor::pos()).y();
  51
  52         lastMetaroom = NULL;
  53 }
  54
  55 openc2eView::~openc2eView() {
  56 }
  57
  58 boost::shared_ptr<class Backend> openc2eView::getBackend() {
  59         return boost::dynamic_pointer_cast<class Backend, class QtBackend>(backend);
  60 }
  61
  62 void openc2eView::resizescrollbars() {
  63         if (world.camera.getMetaRoom()) {
  64                 if (world.camera.getMetaRoom()->wraparound()) {
  65                         horizontalScrollBar()->setRange(0,world.camera.getMetaRoom()->width());
  66                 } else {
  67                         horizontalScrollBar()->setRange(0,world.camera.getMetaRoom()->width() - viewport()->width());
  68                 }
  69                 verticalScrollBar()->setRange(0,world.camera.getMetaRoom()->height() - viewport()->height());
  70         }
  71 }
  72
  73 bool firsttime = true;
  74 int currentwidth, currentheight;
  75
  76 void openc2eView::resizeEvent(QResizeEvent *) {
  77         if (firsttime) {
  78                 backend->setup(viewport());
  79                 firsttime = false;
  80         }
  81
  82         backend->resized(viewport()->width(), viewport()->height());
  83         currentwidth = viewport()->width();
  84         currentheight = viewport()->height();
  85
  86         resizescrollbars();
  87
  88         horizontalScrollBar()->setPageStep(width());
  89         verticalScrollBar()->setPageStep(height());
  90 }
  91
  92 void openc2eView::paintEvent(QPaintEvent *) {
  93         ((QApplication *)QApplication::instance())->syncX();
  94
  95         if (!firsttime) {
  96                 // TODO: mad hax
  97                 if (currentwidth == viewport()->width() && currentheight == viewport()->height()) {
  98                         world.drawWorld();
  99                         backend->renderDone();
 100                 }
 101         }
 102 }
 103
 104 void openc2eView::mouseMoveEvent(QMouseEvent *m) {
 105         // add mouse move event to backend queue
 106         SomeEvent e;
 107         e.type = eventmousemove;
 108         e.xrel = m->x() - lastmousex;
 109         e.yrel = m->y() - lastmousey;
 110         lastmousex = e.x = m->x();
 111         lastmousey = e.y = m->y();
 112         e.button = 0;
 113         if (m->buttons() & Qt::LeftButton) e.button |= buttonleft;
 114         if (m->buttons() & Qt::MidButton) e.button |= buttonmiddle;
 115         if (m->buttons() & Qt::RightButton) e.button |= buttonright;
 116         backend->pushEvent(e);
 117 }
 118
 119 // helper function
 120 void openc2eView::mouseEvent(QMouseEvent *m, eventtype t) {
 121         SomeEvent e;
 122         e.type = t;
 123         e.x = m->x();
 124         e.y = m->y();
 125         switch (m->button()) {
 126                 case Qt::LeftButton: e.button = buttonleft; break;
 127                 case Qt::MidButton: e.button = buttonmiddle; break;
 128                 case Qt::RightButton: e.button = buttonright; break;
 129                 default: return;
 130         }
 131         backend->pushEvent(e);
 132 }
 133
 134 void openc2eView::mousePressEvent(QMouseEvent *m) {
 135         mouseEvent(m, eventmousebuttondown);
 136 }
 137
 138 void openc2eView::mouseReleaseEvent(QMouseEvent *m) {
 139         mouseEvent(m, eventmousebuttonup);
 140 }
 141
 142 void openc2eView::wheelEvent(QWheelEvent *w) {
 143         SomeEvent e;
 144         e.type = eventmousebuttondown;
 145         e.x = w->x();
 146         e.y = w->y();
 147         // TODO: qt combines events, we should generate one event for every 120 delta, maybe
 148         if (w->delta() < 0)
 149                 e.button = buttonwheelup;
 150         else
 151                 e.button = buttonwheeldown;
 152         backend->pushEvent(e);
 153 }
 154
 155 void openc2eView::keyPressEvent(QKeyEvent *k) {
 156         backend->keyEvent(k, true);
 157 }
 158
 159 void openc2eView::keyReleaseEvent(QKeyEvent *k) {
 160         backend->keyEvent(k, false);
 161 }
 162
 163 void openc2eView::scrollContentsBy(int dx, int dy) {
 164         (void)dx;
 165         (void)dy;
 166         if (lastMetaroom)
 167                 world.camera.moveTo(horizontalScrollBar()->value() + lastMetaroom->x(), verticalScrollBar()->value() + lastMetaroom->y());
 168 }
 169
 170 void openc2eView::tick() {
 171         if (lastMetaroom != world.camera.getMetaRoom()) {
 172                 lastMetaroom = world.camera.getMetaRoom();
 173                 resizescrollbars();
 174         }
 175 }
 176
 177 bool openc2eView::needsRender() {
 178         return backend->needsRender();
 179 }
 180