src/WorkArea.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2000 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12 #include <cmath>
  13
  14 #ifdef __GNUG__
  15 #pragma implementation
  16 #endif
  17
  18 #include "WorkArea.h"
  19 #include "up.xpm"
  20 #include "down.xpm"
  21 #include "debug.h"
  22 #include "support/lstrings.h"
  23 #include "BufferView.h"
  24
  25 FL_OBJECT * figinset_canvas;
  26
  27 static inline
  28 void waitForX()
  29 {
  30         XSync(fl_get_display(), 0);
  31 }
  32
  33 extern "C" {
  34 // Just a bunch of C wrappers around static members of WorkArea
  35         void C_WorkArea_up_cb(FL_OBJECT * ob, long buf)
  36         {
  37                 WorkArea::up_cb(ob, buf);
  38         }
  39
  40         void C_WorkArea_down_cb(FL_OBJECT * ob, long buf)
  41         {
  42                 WorkArea::down_cb(ob, buf);
  43         }
  44
  45         void C_WorkArea_scroll_cb(FL_OBJECT * ob, long buf)
  46         {
  47                 WorkArea::scroll_cb(ob, buf);
  48         }
  49
  50         int C_WorkArea_work_area_handler(FL_OBJECT * ob, int event,
  51                                            FL_Coord, FL_Coord,
  52                                            int key, void * xev)
  53         {
  54                 return WorkArea::work_area_handler(ob, event,
  55                                                    0, 0, key, xev);
  56         }
  57 }
  58
  59
  60
  61 WorkArea::WorkArea(BufferView * o, int xpos, int ypos, int width, int height)
  62         : owner(o), workareapixmap(0), painter_(*this)
  63 {
  64         fl_freeze_all_forms();
  65
  66         figinset_canvas = 0;
  67
  68         lyxerr << "Creating work area: +"
  69                << xpos << '+' << ypos << ' '
  70                << width << 'x' << height << endl;
  71         //
  72         FL_OBJECT * obj;
  73         const int bw = int(abs(float(fl_get_border_width())));
  74
  75         // We really want to get rid of figinset_canvas.
  76         ::figinset_canvas = figinset_canvas = obj =
  77                   fl_add_canvas(FL_NORMAL_CANVAS,
  78                                 xpos + 1, ypos + 1, 1, 1, "");
  79         fl_set_object_boxtype(obj, FL_NO_BOX);
  80         fl_set_object_resize(obj, FL_RESIZE_ALL);
  81         fl_set_object_gravity(obj, NorthWestGravity, NorthWestGravity);
  82
  83         // a box
  84         lyxerr << "\tbackground box: +"
  85                << xpos << '+' << ypos << ' '
  86                << width - 15 << 'x' << height << endl;
  87         backgroundbox = obj = fl_add_box(FL_BORDER_BOX,
  88                                          xpos, ypos,
  89                                          width - 15,
  90                                          height,"");
  91         fl_set_object_resize(obj, FL_RESIZE_ALL);
  92         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
  93
  94         //
  95         // THE SCROLLBAR
  96         //
  97
  98         // up - scrollbar button
  99         fl_set_border_width(-1);
 100
 101         lyxerr << "\tup button: +"
 102                << xpos + width - 15 << '+' << ypos << ' '
 103                << 15 << 'x' << 15 << endl;
 104         button_up = obj = fl_add_pixmapbutton(FL_TOUCH_BUTTON,
 105                                               xpos + width - 15,
 106                                               ypos,
 107                                               15, 15, "");
 108         fl_set_object_boxtype(obj,FL_UP_BOX);
 109         fl_set_object_color(obj,FL_MCOL,FL_BLUE);
 110         fl_set_object_resize(obj, FL_RESIZE_ALL);
 111         fl_set_object_gravity(obj,NorthEastGravity, NorthEastGravity);
 112         obj->u_vdata = this;
 113         fl_set_object_callback(obj,C_WorkArea_up_cb, 0);
 114         fl_set_pixmapbutton_data(obj, const_cast<char**>(up_xpm));
 115
 116         // Remove the blue feedback rectangle
 117         fl_set_pixmapbutton_focus_outline(obj,0);
 118
 119         // the scrollbar slider
 120         fl_set_border_width(-bw);
 121         lyxerr << "\tscrollbar slider: +"
 122                << xpos + width - 15 << '+' << ypos + 15 << ' '
 123                << 15 << 'x' << height - 30 << endl;
 124         scrollbar = obj = fl_add_slider(FL_VERT_SLIDER,
 125                                         xpos + width - 15,
 126                                         ypos + 15,
 127                                         15, height - 30, "");
 128         fl_set_object_color(obj,FL_COL1,FL_MCOL);
 129         fl_set_object_boxtype(obj, FL_UP_BOX);
 130         fl_set_object_resize(obj, FL_RESIZE_ALL);
 131         fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
 132         obj->u_vdata = this;
 133         fl_set_object_callback(obj, C_WorkArea_scroll_cb, 0);
 134         fl_set_slider_precision(obj, 0);
 135
 136         // down - scrollbar button
 137         fl_set_border_width(-1);
 138
 139         lyxerr << "\tdown button: +"
 140                << xpos + width - 15 << '+' << ypos + height - 15 << ' '
 141                << 15 << 'x' << 15 << endl;
 142         button_down = obj = fl_add_pixmapbutton(FL_TOUCH_BUTTON,
 143                                                 xpos + width - 15,
 144                                                 ypos + height - 15,
 145                                                 15, 15, "");
 146         fl_set_object_boxtype(obj,FL_UP_BOX);
 147         fl_set_object_color(obj,FL_MCOL,FL_BLUE);
 148         fl_set_object_resize(obj, FL_RESIZE_ALL);
 149         fl_set_object_gravity(obj, SouthEastGravity, SouthEastGravity);
 150         obj->u_vdata = this;
 151         fl_set_object_callback(obj, C_WorkArea_down_cb, 0);
 152         fl_set_pixmapbutton_data(obj, const_cast<char**>(down_xpm));
 153
 154         fl_set_border_width(-bw);
 155
 156         // Remove the blue feedback rectangle
 157         fl_set_pixmapbutton_focus_outline(obj,0);
 158
 159         ///
 160         /// The free object
 161
 162         // Create the workarea pixmap
 163         createPixmap(width - 15 - 2 * bw, height - 2 * bw);
 164
 165         // setup the painter
 166         painter_.setDisplay(fl_display);
 167         painter_.setDrawable(workareapixmap);
 168
 169         // We add this object as late as possible to avoit problems
 170         // with drawing.
 171         lyxerr << "\tfree object: +"
 172                << xpos + bw << '+' << ypos + bw << ' '
 173                << width - 15 - 2 * bw << 'x' << height - 2 * bw << endl;
 174         work_area = obj = fl_add_free(FL_INPUT_FREE,
 175                                       xpos + bw, ypos + bw,
 176                                       width - 15 - 2 * bw, // scrollbarwidth
 177                                       height - 2 * bw, "",
 178                                       C_WorkArea_work_area_handler);
 179         obj->wantkey = FL_KEY_TAB;
 180         obj->u_vdata = this; /* This is how we pass the WorkArea
 181                                        to the work_area_handler. */
 182         fl_set_object_boxtype(obj,FL_DOWN_BOX);
 183         fl_set_object_resize(obj, FL_RESIZE_ALL);
 184         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 185
 186         fl_unfreeze_all_forms();
 187 }
 188
 189
 190 WorkArea::~WorkArea()
 191 {
 192         if (workareapixmap)
 193                 XFreePixmap(fl_display, workareapixmap);
 194 }
 195
 196
 197 void WorkArea::resize(int xpos, int ypos, int width, int height)
 198 {
 199         fl_freeze_all_forms();
 200
 201         const int bw = int(abs(float(fl_get_border_width())));
 202
 203         // a box
 204         fl_set_object_geometry(backgroundbox, xpos, ypos, width - 15, height);
 205
 206         //
 207         // THE SCROLLBAR
 208         //
 209
 210         // up - scrollbar button
 211         fl_set_object_geometry(button_up, xpos + width - 15,
 212                                ypos,
 213                                15, 15);
 214         // the scrollbar slider
 215         fl_set_object_geometry(scrollbar, xpos + width - 15,
 216                                ypos + 15,
 217                                15, height - 30);
 218         // down - scrollbar button
 219         fl_set_object_geometry(button_down, xpos + width - 15,
 220                                ypos + height - 15,
 221                                15, 15);
 222
 223         // Create the workarea pixmap
 224         createPixmap(width - 15 - 2 * bw, height - 2 * bw);
 225
 226         // reset the painter
 227         painter_.setDrawable(workareapixmap);
 228
 229         // the free object
 230         fl_set_object_geometry(work_area, xpos + bw, ypos + bw,
 231                                width - 15 - 2 * bw,
 232                                height - 2 * bw);
 233
 234         fl_unfreeze_all_forms();
 235
 236 }
 237
 238
 239 void WorkArea::createPixmap(int width, int height)
 240 {
 241         static int cur_width = -1;
 242         static int cur_height = -1;
 243
 244         if (cur_width == width && cur_height == height && workareapixmap)
 245                 return;
 246
 247         cur_width = width;
 248         cur_height = height;
 249
 250         if (workareapixmap)
 251                 XFreePixmap(fl_display, workareapixmap);
 252
 253         lyxerr << "Creating pixmap (" << width << 'x' << height << ")" << endl;
 254
 255         workareapixmap = XCreatePixmap(fl_display,
 256                                        RootWindow(fl_display, 0),
 257                                        width,
 258                                        height,
 259                                        fl_get_visual_depth());
 260         lyxerr << "\tpixmap=" << workareapixmap << endl;
 261 }
 262
 263
 264 void WorkArea::greyOut() const
 265 {
 266         fl_winset(FL_ObjWin(work_area));
 267         fl_rectangle(1, work_area->x, work_area->y,
 268                      work_area->w, work_area->h, FL_GRAY63);
 269 }
 270
 271
 272 void WorkArea::setFocus() const
 273 {
 274         fl_set_focus_object(work_area->form, work_area);
 275 }
 276
 277
 278 void WorkArea::setScrollbar(double pos, double length_fraction) const
 279 {
 280         fl_set_slider_value(scrollbar, pos);
 281         fl_set_slider_size(scrollbar, scrollbar->h * length_fraction);
 282 }
 283
 284
 285 void WorkArea::setScrollbarBounds(double l1, double l2) const
 286 {
 287         fl_set_slider_bounds(scrollbar, l1, l2);
 288 }
 289
 290
 291 void WorkArea::setScrollbarIncrements(float inc) const
 292 {
 293         fl_set_slider_increment(scrollbar, work_area->h - inc, inc);
 294 }
 295
 296
 297 void WorkArea::up_cb(FL_OBJECT * ob, long)
 298 {
 299         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 300         XEvent const * ev2 = fl_last_event();
 301         static long time = 0;
 302         ev2 = fl_last_event();
 303         if (ev2->type == ButtonPress || ev2->type == ButtonRelease)
 304                 time = 0;
 305         //area->up(time++, fl_get_button_numb(ob));
 306         area->owner->upCB(time++, fl_get_button_numb(ob));
 307 }
 308
 309
 310 void WorkArea::down_cb(FL_OBJECT * ob, long)
 311 {
 312         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 313         XEvent const * ev2 = fl_last_event();
 314         static long time = 0;
 315         if (ev2->type == ButtonPress || ev2->type == ButtonRelease)
 316                 time = 0;
 317         //area->down(time++, fl_get_button_numb(ob));
 318         area->owner->downCB(time++, fl_get_button_numb(ob));
 319 }
 320
 321
 322 // Callback for scrollbar slider
 323 void WorkArea::scroll_cb(FL_OBJECT * ob, long)
 324 {
 325         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 326
 327         //area->scroll(fl_get_slider_value(ob));
 328         area->owner->scrollCB(fl_get_slider_value(ob));
 329         waitForX();
 330 }
 331
 332 bool Lgb_bug_find_hack = false;
 333
 334 int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
 335                                   FL_Coord, FL_Coord ,
 336                                   int /*key*/, void * xev)
 337 {
 338         static int x_old = -1;
 339         static int y_old = -1;
 340         static long scrollbar_value_old = -1;
 341
 342         XEvent * ev = static_cast<XEvent*>(xev);
 343         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 344
 345         if (!area) return 1;
 346
 347         switch (event){
 348         case FL_DRAW:
 349                 if (!area->work_area ||
 350                     !area->work_area->form->visible)
 351                         return 1;
 352                 lyxerr.debug() << "Workarea event: DRAW" << endl;
 353                 area->createPixmap(area->workWidth(), area->height());
 354                 Lgb_bug_find_hack = true;
 355                 area->owner->workAreaExpose();
 356                 Lgb_bug_find_hack = false;
 357                 break;
 358         case FL_PUSH:
 359                 if (!ev) break;
 360                 // Should really have used xbutton.state
 361                 lyxerr.debug() << "Workarea event: PUSH" << endl;
 362                 area->owner->workAreaButtonPress(ev->xbutton.x - ob->x,
 363                                            ev->xbutton.y - ob->y,
 364                                            ev->xbutton.button);
 365                 break;
 366         case FL_RELEASE:
 367                 if (!ev) break;
 368                 // Should really have used xbutton.state
 369                 lyxerr.debug() << "Workarea event: RELEASE" << endl;
 370                 area->owner->workAreaButtonRelease(ev->xbutton.x - ob->x,
 371                                              ev->xbutton.y - ob->y,
 372                                              ev->xbutton.button);
 373                 break;
 374         case FL_MOUSE:
 375                 if (!ev || ! area->scrollbar) break;
 376                 if (ev->xmotion.x != x_old ||
 377                     ev->xmotion.y != y_old ||
 378                     fl_get_slider_value(area->scrollbar) != scrollbar_value_old) {
 379                         lyxerr.debug() << "Workarea event: MOUSE" << endl;
 380                         area->owner->workAreaMotionNotify(ev->xmotion.x - ob->x,
 381                                                     ev->xmotion.y - ob->y,
 382                                                     ev->xbutton.state);
 383                 }
 384                 break;
 385         // Done by the raw callback:
 386         //  case FL_KEYBOARD: WorkAreaKeyPress(ob, 0,0,0,ev,0); break;
 387         case FL_FOCUS:
 388                 lyxerr.debug() << "Workarea event: FOCUS" << endl;
 389                 break;
 390         case FL_UNFOCUS:
 391                 lyxerr.debug() << "Workarea event: UNFOCUS" << endl;
 392                 break;
 393         case FL_ENTER:
 394                 lyxerr.debug() << "Workarea event: ENTER" << endl;
 395                 break;
 396         case FL_LEAVE:
 397                 lyxerr.debug() << "Workarea event: LEAVE" << endl;
 398                 break;
 399         case FL_DBLCLICK:
 400                 if (!ev) break;
 401                 lyxerr.debug() << "Workarea event: DBLCLICK" << endl;;
 402                 break;
 403         case FL_TRPLCLICK:
 404                 if (!ev) break;
 405                 lyxerr.debug() << "Workarea event: TRPLCLICK" << endl;
 406                 break;
 407         case FL_OTHER:
 408                 if (!ev) break;
 409                 if (ev->type == SelectionNotify) {
 410                         lyxerr.debug() << "Workarea event: SELECTION" << endl;
 411                         area->owner->workAreaSelectionNotify(area->work_area->form->window, ev);
 412                 } else
 413                         lyxerr.debug() << "Workarea event: OTHER" << endl;
 414
 415                 break;
 416         }
 417
 418         return 1;
 419 }