]> git.lyx.org Git - lyx.git/blobdiff - src/frontends/xforms/XWorkArea.C
get rid of broken_header.h and some unneeded tests
[lyx.git] / src / frontends / xforms / XWorkArea.C
index 97aff9cf7aa92148ea9fdddcba731f5ca8304d46..51f9a4e405b439b75818cbdeacb50ee1f926a4f8 100644 (file)
@@ -1,97 +1,72 @@
-/* This file is part of
- * ======================================================
+/**
+ * \file XWorkArea.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
  *
- *           LyX, The Document Processor
+ * \author unknown
+ * \author John Levon
  *
- *           Copyright 1995 Matthias Ettrich
- *           Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
+ * Full author contact details are available in file CREDITS.
+ */
 
 #include <config.h>
 
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
 #include "XWorkArea.h"
-#include "debug.h"
-#include "frontends/LyXView.h"
-#include "lyxrc.h" // lyxrc.show_banner
-#include "version.h" // lyx_version
 
-#if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
-#include "frontends/xforms/lyxlookup.h"
-#endif
+#include "Color.h"
+#include "XFormsView.h"
+#include "XLyXKeySym.h"
 
-#include "support/filetools.h" // LibFileSearch
-#include "support/lstrings.h"
-#include "support/LAssert.h"
+#include "debug.h"
+#include "funcrequest.h"
+#include "LColor.h"
+#include "Timeout.h"
 
-#include <cmath>
-#include <cctype>
+#include <boost/bind.hpp>
 
-// xforms doesn't define this (but it should be in <forms.h>).
-extern "C"
-FL_APPEVENT_CB fl_set_preemptive_callback(Window, FL_APPEVENT_CB, void *);
+using boost::shared_ptr;
 
-using std::endl;
 using std::abs;
+using std::dec;
+using std::endl;
 using std::hex;
+using std::string;
+
+namespace lyx {
+namespace frontend {
 
 namespace {
 
-inline
-void waitForX()
+inline void waitForX(bool discard)
 {
-       XSync(fl_get_display(), 0);
+       XSync(fl_get_display(), discard);
 }
 
-// FIXME !
+
 mouse_button::state x_button_state(unsigned int button)
 {
        mouse_button::state b = mouse_button::none;
        switch (button) {
-               case Button1:
-                       b = mouse_button::button1;
-                       break;
-               case Button2:
-                       b = mouse_button::button2;
-                       break;
-               case Button3:
-                       b = mouse_button::button3;
-                       break;
-               case Button4:
-                       b = mouse_button::button4;
-                       break;
-               case Button5:
-                       b = mouse_button::button5;
-                       break;
-               default: // FIXME
-                       break;
+       case FL_MBUTTON1:
+               b = mouse_button::button1;
+               break;
+       case FL_MBUTTON2:
+               b = mouse_button::button2;
+               break;
+       case FL_MBUTTON3:
+               b = mouse_button::button3;
+               break;
+       case FL_MBUTTON4:
+               b = mouse_button::button4;
+               break;
+       case FL_MBUTTON5:
+               b = mouse_button::button5;
+               break;
        }
        return b;
 }
 
 
-// FIXME
-mouse_button::state x_motion_state(unsigned int state)
-{
-       mouse_button::state b = mouse_button::none;
-       if (state & Button1MotionMask)
-               b |= mouse_button::button1;
-       if (state & Button2MotionMask)
-               b |= mouse_button::button2;
-       if (state & Button3MotionMask)
-               b |= mouse_button::button3;
-       if (state & Button4MotionMask)
-               b |= mouse_button::button4;
-       if (state & Button5MotionMask)
-               b |= mouse_button::button5;
-       return b;
-}
-
-
 key_modifier::state x_key_state(unsigned int state)
 {
        key_modifier::state k = key_modifier::none;
@@ -105,200 +80,117 @@ key_modifier::state x_key_state(unsigned int state)
 }
 
 
-} // anon namespace
+extern "C" {
 
+void C_scroll_cb(FL_OBJECT * ob, long)
+{
+       XWorkArea * area = static_cast<XWorkArea *>(ob->u_vdata);
+       area->scroll_cb();
+}
 
-extern "C" {
-       // Just a bunch of C wrappers around static members of WorkArea
-       static
-       void C_WorkArea_scroll_cb(FL_OBJECT * ob, long buf)
-       {
-               WorkArea::scroll_cb(ob, buf);
-       }
 
+int C_work_area_handler(FL_OBJECT * ob, int event, FL_Coord, FL_Coord,
+                       int key, void * xev)
+{
+       return XWorkArea::work_area_handler(ob, event, 0, 0, key, xev);
+}
 
-       static
-       int C_WorkArea_work_area_handler(FL_OBJECT * ob, int event,
-                                        FL_Coord, FL_Coord,
-                                        int key, void * xev)
-       {
-               return WorkArea::work_area_handler(ob, event,
-                                                  0, 0, key, xev);
-       }
 
-       static
-       int C_WorkAreaEventCB(FL_FORM * form, void * xev) {
-               WorkArea * wa = static_cast<WorkArea*>(form->u_vdata);
-               return wa->event_cb(static_cast<XEvent*>(xev));
-       }
+int C_event_cb(FL_FORM * form, void * xev)
+{
+       XWorkArea * area = static_cast<XWorkArea *>(form->u_vdata);
+       return area->event_cb(static_cast<XEvent *>(xev));
 }
 
+} // extern "C"
+} // namespace anon
+
 
-WorkArea::WorkArea(int xpos, int ypos, int width, int height)
-       : splash_(0), splash_text_(0), workareapixmap(0), painter_(*this)
+XWorkArea::XWorkArea(LyXView & owner, int w, int h)
+       : workareapixmap(0), painter_(*this)
 {
        fl_freeze_all_forms();
 
-       if (lyxerr.debugging(Debug::WORKAREA))
-               lyxerr << "Creating work area: +"
-                      << xpos << '+' << ypos << ' '
-                      << width << 'x' << height << endl;
-       //
        FL_OBJECT * obj;
-       int const bw = int(abs(fl_get_border_width()));
+       FL_OBJECT * frame;
 
-       // a box
-       if (lyxerr.debugging(Debug::WORKAREA))
-               lyxerr << "\tbackground box: +"
-                      << xpos << '+' << ypos << ' '
-                      << width - 15 << 'x' << height << endl;
-       backgroundbox = obj = fl_add_box(FL_BORDER_BOX,
-                                        xpos, ypos,
-                                        width - 15,
-                                        height,"");
+       // A frame around the work area.
+       frame = obj = fl_add_box(FL_BORDER_BOX, 0, 0, w, h, "");
        fl_set_object_resize(obj, FL_RESIZE_ALL);
        fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 
-       // Add a splash screen to the centre of the work area
-       string const splash_file = (lyxrc.show_banner) ?
-               LibFileSearch("images", "banner", "xpm") : string();
-
-       if (!splash_file.empty()) {
-               int const splash_w = 425;
-               int const splash_h = 290;
-               int const splash_x = xpos + (width - 15 - splash_w) / 2;
-               int const splash_y = ypos + (height - splash_h) / 2;
-               splash_ = obj =
-                       fl_add_pixmapbutton(FL_NORMAL_BUTTON,
-                                           splash_x, splash_y,
-                                           splash_w, splash_h, "");
-               fl_set_pixmapbutton_file(obj, splash_file.c_str());
-               fl_set_pixmapbutton_focus_outline(obj, 3);
-               fl_set_object_boxtype(obj, FL_NO_BOX);
-
-               int const text_x = splash_x + 260;
-               int const text_y = splash_y + 255;
-               splash_text_ = obj =
-                       fl_add_text(FL_NORMAL_TEXT, text_x, text_y, 160, 16,
-                                   lyx_version);
-               fl_set_object_lsize(obj, FL_NORMAL_SIZE);
-               fl_mapcolor(FL_FREE_COL2, 0x2b, 0x47, 0x82);
-               fl_mapcolor(FL_FREE_COL3, 0xe1, 0xd2, 0x9b);
-               fl_set_object_color(obj, FL_FREE_COL2, FL_FREE_COL2);
-               fl_set_object_lcol(obj, FL_FREE_COL3);
-               fl_set_object_lalign(obj, FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
-               fl_set_object_lstyle(obj, FL_BOLD_STYLE);
+       unsigned int r, g, b;
+       if (getRGBColor(LColor::background, r, g, b)) {
+               fl_mapcolor(FL_FREE_COL12, r, g, b);
+               fl_set_object_color(obj, FL_FREE_COL12, FL_MCOL);
        }
 
-       //
-       // THE SCROLLBAR
-       //
-
-       scrollbar = obj = fl_add_scrollbar(FL_VERT_SCROLLBAR,
-                                          xpos + width - 15,
-                                          ypos, 17, height, "");
+       // The scrollbar.
+       scrollbar = obj = fl_add_scrollbar(FL_VERT_SCROLLBAR, 0, 0, w, h, "");
        fl_set_object_boxtype(obj, FL_UP_BOX);
        fl_set_object_resize(obj, FL_RESIZE_ALL);
        fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
        obj->u_vdata = this;
-       fl_set_object_callback(obj, C_WorkArea_scroll_cb, 0);
-       setScrollbarBounds(0.0, 0.0);
-
-       ///
-       /// The free object
-
-       // Create the workarea pixmap
-       createPixmap(width - 15 - 2 * bw, height - 2 * bw);
-
-       // We add this object as late as possible to avoit problems
-       // with drawing.
-       if (lyxerr.debugging(Debug::WORKAREA))
-               lyxerr << "\tfree object: +"
-                      << xpos + bw << '+' << ypos + bw << ' '
-                      << width - 15 - 2 * bw << 'x'
-                      << height - 2 * bw << endl;
-
-       work_area = obj = fl_add_free(FL_ALL_FREE,
-                                     xpos + bw, ypos + bw,
-                                     width - 15 - 2 * bw, // scrollbarwidth
-                                     height - 2 * bw, "",
-                                     C_WorkArea_work_area_handler);
+       fl_set_object_callback(obj, C_scroll_cb, 0);
+       fl_set_scrollbar_bounds(scrollbar, 0.0, 0.0);
+       fl_set_scrollbar_value(scrollbar, 0.0);
+       fl_set_scrollbar_size(scrollbar, scrollbar->h);
+
+       // The work area itself
+       work_area = obj = fl_add_free(FL_ALL_FREE, 0, 0, w, h, "",
+                                     C_work_area_handler);
        obj->wantkey = FL_KEY_ALL;
-       obj->u_vdata = this; /* This is how we pass the WorkArea
-                               to the work_area_handler. */
+       obj->u_vdata = this;
+
        fl_set_object_boxtype(obj,FL_DOWN_BOX);
        fl_set_object_resize(obj, FL_RESIZE_ALL);
        fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 
-       /// X selection hook - xforms gets it wrong
-       fl_current_form->u_vdata = this;
-       fl_register_raw_callback(fl_current_form, FL_ALL_EVENT, C_WorkAreaEventCB);
-
-       fl_unfreeze_all_forms();
-}
-
-
-WorkArea::~WorkArea()
-{
-       if (workareapixmap)
-               XFreePixmap(fl_get_display(), workareapixmap);
-}
+       // Hand control of the layout of these widgets to the
+       // Layout Engine.
+       XFormsView & xview = dynamic_cast<XFormsView &>(owner);
+       BoxList & boxlist = xview.getBox(XFormsView::Center)->children();
 
+       wa_box_ = boxlist.push_back(Box(0,0));
+       wa_box_->set(Box::Horizontal);
 
-void WorkArea::resize(int xpos, int ypos, int width, int height)
-{
-       fl_freeze_all_forms();
+       shared_ptr<Box> frame_box = widgets_.add(frame, wa_box_->children(), 0, 0);
+       frame_box->set(Box::Expand);
 
        int const bw = int(abs(fl_get_border_width()));
+       shared_ptr<Box> wa_box = embed(work_area, frame_box->children(), widgets_, bw);
+       wa_box->set(Box::Expand);
 
-       // a box
-       fl_set_object_geometry(backgroundbox, xpos, ypos, width - 15, height);
-
-       //
-       // THE SCROLLBAR
-       //
-       fl_set_object_geometry(scrollbar, xpos + width - 15,
-                              ypos, 17, height);
+       widgets_.add(scrollbar, wa_box_->children(), 17, 0);
 
-       // Create the workarea pixmap
-       createPixmap(width - 15 - 2 * bw, height - 2 * bw);
+       xview.metricsUpdated.connect(boost::bind(&WidgetMap::updateMetrics,
+                                                &widgets_));
 
-       // the free object
-       fl_set_object_geometry(work_area, xpos + bw, ypos + bw,
-                              width - 15 - 2 * bw,
-                              height - 2 * bw);
+       /// X selection hook - xforms gets it wrong
+       fl_current_form->u_vdata = this;
+       fl_register_raw_callback(fl_current_form, FL_ALL_EVENT, C_event_cb);
 
        fl_unfreeze_all_forms();
+
+       XGCValues val;
+
+       val.function = GXcopy;
+       val.graphics_exposures = false;
+       copy_gc = XCreateGC(fl_get_display(), RootWindow(fl_get_display(), 0),
+                           GCFunction | GCGraphicsExposures, &val);
 }
 
 
-namespace {
-void destroy_object(FL_OBJECT * obj)
+XWorkArea::~XWorkArea()
 {
-       if (!obj)
-               return;
-
-       if (obj->visible) {
-               fl_hide_object(obj);
-       }
-       fl_delete_object(obj);
-       fl_free_object(obj);
+       XFreeGC(fl_get_display(), copy_gc);
+       if (workareapixmap)
+               XFreePixmap(fl_get_display(), workareapixmap);
 }
-} // namespace anon
 
 
-void WorkArea::createPixmap(int width, int height)
+void XWorkArea::updateGeometry(int width, int height)
 {
-       // Three calls to createPixmap are needed to draw the initial view
-       // of LyX. Any more and the splash is destroyed.
-       static int counter = 0;
-       if (++counter == 4) {
-               destroy_object(splash_);
-               splash_ = 0;
-               destroy_object(splash_text_);
-               splash_text_ = 0;
-       }
-
        static int cur_width = -1;
        static int cur_height = -1;
 
@@ -308,173 +200,289 @@ void WorkArea::createPixmap(int width, int height)
        cur_width = width;
        cur_height = height;
 
-       if (workareapixmap)
-               XFreePixmap(fl_get_display(), workareapixmap);
+       if (lyxerr.debugging(Debug::WORKAREA)) {
+               lyxerr << "(Re)creating pixmap ("
+                      << width << 'x' << height << ')' << endl;
+       }
 
-       if (lyxerr.debugging(Debug::WORKAREA))
-               lyxerr << "Creating pixmap ("
-                      << width << 'x' << height << ")" << endl;
+       if (workareapixmap) {
+               XFreePixmap(fl_get_display(), workareapixmap);
+       }
 
        workareapixmap = XCreatePixmap(fl_get_display(),
                                       RootWindow(fl_get_display(), 0),
                                       width,
                                       height,
                                       fl_get_visual_depth());
-       if (lyxerr.debugging(Debug::WORKAREA))
-               lyxerr << "\tpixmap=" << workareapixmap << endl;
+
+       workAreaResize();
 }
 
 
-void WorkArea::greyOut() const
+void XWorkArea::paint(int x, int y, int w, int h)
 {
-       if (!splash_) {
-               fl_winset(FL_ObjWin(work_area));
-               fl_rectangle(1, work_area->x, work_area->y,
-                            work_area->w, work_area->h, FL_GRAY63);
-       }
+       lyxerr[Debug::WORKAREA]
+               << "XWorkarea::paint " << w << 'x' << h
+               << '+' << x << '+' << y << endl;
+
+       updateGeometry(workWidth(), workHeight());
+       XCopyArea(fl_get_display(),
+                 getPixmap(), getWin(),
+                 copy_gc, x, y, w, h,
+                 work_area->x + x, work_area->y + y);
 }
 
 
-void WorkArea::setFocus() const
+void XWorkArea::setScrollbarParams(int height, int pos, int line_height)
 {
-       fl_set_focus_object(work_area->form, work_area);
-}
+       // we need to cache this for scroll_cb
+       doc_height_ = height;
 
+       if (height == 0) {
+               fl_set_scrollbar_value(scrollbar, 0.0);
+               fl_set_scrollbar_size(scrollbar, scrollbar->h);
+               return;
+       }
+
+       long const work_height = workHeight();
+
+       if (lyxerr.debugging(Debug::GUI)) {
+               lyxerr << "scroll: height now " << height << '\n'
+                      << "scroll: work_height " << work_height << endl;
+       }
+
+       /* If the text is smaller than the working area, the scrollbar
+        * maximum must be the working area height. No scrolling will
+        * be possible */
+       if (height <= work_height) {
+               lyxerr[Debug::GUI] << "scroll: doc smaller than workarea !"
+                                  << endl;
+               fl_set_scrollbar_bounds(scrollbar, 0.0, 0.0);
+               fl_set_scrollbar_value(scrollbar, pos);
+               fl_set_scrollbar_size(scrollbar, scrollbar->h);
+               return;
+       }
+
+       fl_set_scrollbar_bounds(scrollbar, 0.0, height - work_height);
+       fl_set_scrollbar_increment(scrollbar, work_area->h - line_height, line_height);
 
-void WorkArea::setScrollbar(double pos, double length_fraction) const
-{
        fl_set_scrollbar_value(scrollbar, pos);
-       fl_set_scrollbar_size(scrollbar, scrollbar->h * length_fraction);
-}
 
+       double const slider_size =
+               (height == 0) ? 1.0 : 1.0 / double(height);
 
-void WorkArea::setScrollbarBounds(double l1, double l2) const
-{
-       fl_set_scrollbar_bounds(scrollbar, l1, l2);
+       fl_set_scrollbar_size(scrollbar, scrollbar->h * slider_size);
 }
 
 
-void WorkArea::setScrollbarIncrements(double inc) const
+// callback for scrollbar slider
+void XWorkArea::scroll_cb()
 {
-       fl_set_scrollbar_increment(scrollbar, work_area->h - inc, inc);
-}
+       double const val = fl_get_scrollbar_value(scrollbar);
 
+       if (lyxerr.debugging(Debug::GUI)) {
+               lyxerr << "scroll: val: " << val << '\n'
+                      << "scroll: height: " << scrollbar->h << '\n'
+                      << "scroll: docheight: " << doc_height_ << endl;
+       }
 
-// Callback for scrollbar slider
-void WorkArea::scroll_cb(FL_OBJECT * ob, long)
-{
-       WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
-       // If we really want the accellerating scroll we can do that
-       // from here. IMHO that is a waste of effort since we already
-       // have other ways to move fast around in the document. (Lgb)
-       area->scrollCB(fl_get_scrollbar_value(ob));
-       waitForX();
+       scrollDocView(int(val));
+       waitForX(false);
 }
 
 
-int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
-                               FL_Coord, FL_Coord ,
-                               int key, void * xev)
+int XWorkArea::work_area_handler(FL_OBJECT * ob, int event,
+                                FL_Coord, FL_Coord,
+                                int key, void * xev)
 {
-       static int x_old = -1;
-       static int y_old = -1;
-       static long scrollbar_value_old = -1;
+       if (event != 11)
+               lyxerr[Debug::WORKAREA] << "Workarea event: EVENT: " << event << endl;
 
        XEvent * ev = static_cast<XEvent*>(xev);
-       WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
+       XWorkArea * area = static_cast<XWorkArea*>(ob->u_vdata);
 
-       if (!area) return 1;
+       if (!area)
+               return 1;
 
        switch (event) {
-       case FL_DRAW:
-               if (!area->work_area ||
-                   !area->work_area->form->visible)
+
+       case FL_DRAW: {
+               if (!area->work_area || !area->work_area->form->visible)
                        return 1;
-               lyxerr[Debug::WORKAREA] << "Workarea event: DRAW" << endl;
-               area->createPixmap(area->workWidth(), area->height());
-               area->workAreaExpose();
+
+               if (ev) {
+                       lyxerr[Debug::WORKAREA]
+                               << "work_area_handler, handling X11 "
+                               "expose event "
+                               << ev->xexpose.width << 'x'
+                               << ev->xexpose.height << '+'
+                               << ev->xexpose.x << '+'
+                               << ev->xexpose.y << endl;
+
+                       // X11 generates XEvents with x, y relative to the
+                       // top left corner of the window.
+                       // XScreen::expose emulates this behaviour.
+                       // We therefore need to remove this offset before
+                       // generating the pixmap.
+                        int const x = ev->xexpose.x - ob->x;
+                        int const y = ev->xexpose.y - ob->y;
+
+                       area->paint(x, y,
+                                   ev->xexpose.width, ev->xexpose.height);
+               } else
+                       area->paint(0, 0,
+                                   area->workWidth(), area->workHeight());
+
                break;
+       }
+
        case FL_PUSH:
                if (!ev || ev->xbutton.button == 0) break;
+
+               if (ev->xbutton.button == 4 || ev->xbutton.button == 5) {
+                       static long last_wheel;
+
+                       long cur_wheel = ev->xbutton.time;
+                       if (last_wheel == cur_wheel)
+                               break;
+
+                       last_wheel = cur_wheel;
+
+                       float l, r;
+                       fl_get_scrollbar_increment(area->scrollbar, &l, &r);
+
+                       if (ev->xbutton.button == 4)
+                               l *= -1.0;
+
+                       fl_set_scrollbar_value(
+                               area->scrollbar,
+                               fl_get_scrollbar_value(area->scrollbar) + l);
+
+                       area->scroll_cb();
+                       break;
+               }
+
                // Should really have used xbutton.state
                lyxerr[Debug::WORKAREA] << "Workarea event: PUSH" << endl;
-               area->workAreaButtonPress(ev->xbutton.x - ob->x,
-                                         ev->xbutton.y - ob->y,
-                                         x_button_state(ev->xbutton.button));
+               area->dispatch(
+                       FuncRequest(LFUN_MOUSE_PRESS,
+                                   ev->xbutton.x - ob->x,
+                                   ev->xbutton.y - ob->y,
+                                   x_button_state(key)));
                break;
+
        case FL_RELEASE:
                if (!ev || ev->xbutton.button == 0) break;
                // Should really have used xbutton.state
+
+               if (ev->xbutton.button == 4 || ev->xbutton.button == 5) {
+                       // We ingnore wheel event here
+                       break;
+               }
+
                lyxerr[Debug::WORKAREA] << "Workarea event: RELEASE" << endl;
-               area->workAreaButtonRelease(ev->xbutton.x - ob->x,
-                                     ev->xbutton.y - ob->y,
-                                     x_button_state(ev->xbutton.button));
+
+               area->dispatch(
+                       FuncRequest(LFUN_MOUSE_RELEASE,
+                                   ev->xbutton.x - ob->x,
+                                   ev->xbutton.y - ob->y,
+                                   x_button_state(key)));
                break;
-#if FL_VERSION < 1 && FL_REVISION < 89
-       case FL_MOUSE:
-#else
-       case FL_DRAG:
-#endif
-               if (!ev || ! area->scrollbar) break;
-               if (ev->xmotion.x != x_old ||
-                   ev->xmotion.y != y_old ||
-                   fl_get_scrollbar_value(area->scrollbar) != scrollbar_value_old
-                       ) {
-                       lyxerr[Debug::WORKAREA] << "Workarea event: MOUSE" << endl;
-                       area->workAreaMotionNotify(ev->xmotion.x - ob->x,
-                                            ev->xmotion.y - ob->y,
-                                            x_motion_state(ev->xbutton.state));
+
+       case FL_DRAG: {
+               lyxerr[Debug::WORKAREA] << "Workarea event: DRAG 0" << endl;
+
+               if (!ev || !area->scrollbar)
+                       break;
+
+               int const drag_x = ev->xmotion.x;
+               int const drag_y = ev->xmotion.y;
+               int const area_y = ob->y;
+               int const area_h = ob->h;
+
+               // Check if the mouse is above or below the workarea
+               if (drag_y <= area_y || drag_y >= area_y + area_h) {
+                       // The mouse button is depressed and we are outside the
+                       // workarea. That means we are simultaneously selecting
+                       // text and scrolling the view.
+                       // Use a Timeout to react to a drag events only every
+                       // 200ms. All intervening events are discarded,
+                       // allowing the user to control position easily.
+                       static int const discard_interval = 200;
+                       static Timeout timeout(discard_interval);
+
+                       if (timeout.running())
+                               break;
+                       // The timeout is not running, so process the
+                       // event, first starting the timeout to discard future
+                       // events.
+                       timeout.start();
+               }
+
+               static int x_old = -1;
+               static int y_old = -1;
+               static double scrollbar_value_old = -1.0;
+
+               double const scrollbar_value =
+                       fl_get_scrollbar_value(area->scrollbar);
+
+               if (drag_x != x_old || drag_y != y_old ||
+                   scrollbar_value != scrollbar_value_old) {
+                       x_old = drag_x;
+                       y_old = drag_y;
+                       scrollbar_value_old = scrollbar_value;
+
+                       lyxerr[Debug::WORKAREA] << "Workarea event: DRAG"
+                                               << endl;
+
+                       // It transpires that ev->xbutton.button == 0 when
+                       // the mouse is dragged, so it cannot be used to
+                       // initialise x_button_state and hence FuncRequest.
+
+                       // The 'key' that is passed into the function does
+                       // contain the necessary info, however.
+
+                       // It is for this reason that x_button_state has
+                       // been modified to work with key
+                       // rather than ev->xbutton.button.
+
+                       // Angus 15 Oct 2002.
+                       FuncRequest cmd(LFUN_MOUSE_MOTION,
+                                       ev->xbutton.x - ob->x,
+                                       ev->xbutton.y - ob->y,
+                                       x_button_state(key));
+                       area->dispatch(cmd);
                }
                break;
-#if FL_VERSION < 1 && FL_REVISION < 89
-       case FL_KEYBOARD:
-#else
-       case FL_KEYPRESS:
-#endif
-       {
-               lyxerr[Debug::WORKAREA] << "Workarea event: KEYBOARD" << endl;
+       }
+
+       case FL_KEYPRESS: {
+               lyxerr[Debug::WORKAREA] << "Workarea event: KEYPRESS" << endl;
 
                KeySym keysym = 0;
                char dummy[1];
                XKeyEvent * xke = reinterpret_cast<XKeyEvent *>(ev);
-#if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
-               // XForms < 0.89.5 does not have compose support
-               // so we are using our own compose support
-               LyXLookupString(ev, dummy, 1, &keysym);
-#else
                XLookupString(xke, dummy, 1, &keysym, 0);
-//             int num_keys = XLookupString(xke, dummy, 10, &keysym, &xcs);
-//             lyxerr << "We have " << num_keys << " keys in the returned buffer" << endl;
-//             lyxerr << "Our dummy string is " << dummy << endl;
-#endif
+
                if (lyxerr.debugging(Debug::KEY)) {
-                       char const * tmp = XKeysymToString(key);
-                       char const * tmp2 = XKeysymToString(keysym);
-                       string const stm = (tmp ? tmp : "");
-                       string const stm2 = (tmp2 ? tmp2 : "");
-
-                       lyxerr[Debug::KEY] << "WorkArea: Key is `" << stm << "' ["
-                              << key << "]" << endl;
-                       lyxerr[Debug::KEY] << "WorkArea: Keysym is `" << stm2 << "' ["
-                              << keysym << "]" << endl;
+                       char const * const tmp  = XKeysymToString(key);
+                       char const * const tmp2 = XKeysymToString(keysym);
+                       string const stm  = (tmp ? tmp : string());
+                       string const stm2 = (tmp2 ? tmp2 : string());
+
+                       lyxerr << "XWorkArea: Key is `" << stm
+                              << "' [" << key << "]\n"
+                              << "XWorkArea: Keysym is `" << stm2
+                              << "' [" << keysym << ']' << endl;
                }
 
-#if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
-               if (keysym == NoSymbol) {
-                       lyxerr[Debug::KEY]
-                               << "Empty kdb action (probably composing)"
-                               << endl;
-                       break;
-               }
-               KeySym ret_key = keysym;
-#else
                // Note that we need this handling because of a bug
                // in XForms 0.89, if this bug is resolved in the way I hope
-               // we can just use the keysym directly with out looking
+               // we can just use the keysym directly without looking
                // at key at all. (Lgb)
                KeySym ret_key = 0;
                if (!key) {
-                       // We migth have to add more keysyms here also,
+                       // We might have to add more keysyms here also,
                        // we will do that as the issues arise. (Lgb)
                        if (keysym == XK_space) {
                                ret_key = keysym;
@@ -493,13 +501,12 @@ int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
                        //              << static_cast<unsigned char>(key)
                        //              << endl;
                        //} else {
-                               ret_key = (keysym ? keysym : key);
-                               lyxerr[Debug::KEY] << "Using keysym [B]"
-                                                  << endl;
+                       ret_key = (keysym ? keysym : key);
+                       lyxerr[Debug::KEY] << "Using keysym [B]"
+                                          << endl;
                                //}
                }
 
-#endif
                unsigned int const ret_state = xke->state;
 
                // If you have a better way to handle "wild-output" of
@@ -520,8 +527,8 @@ int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
                        //       << XEventsQueued(fl_get_display(), QueuedAlready)
                        //       << endl;
                        if (XEventsQueued(fl_get_display(), QueuedAlready) > 0)
-                               XSync(fl_get_display(), 1);
-                       // This purge make f.ex. scrolling stop immidiatly when
+                               waitForX(true);
+                       // This purge make f.ex. scrolling stop immediately when
                        // releasing the PageDown button. The question is if
                        // this purging of XEvents can cause any harm...
                        // after some testing I can see no problems, but
@@ -532,49 +539,65 @@ int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
                last_key_pressed = xke->keycode;
                last_state_pressed = ret_state;
 
-               area->workAreaKeyPress(ret_key, x_key_state(ret_state));
+               XLyXKeySym * xlk = new XLyXKeySym;
+               xlk->initFromKeySym(ret_key);
+
+               area->workAreaKeyPress(LyXKeySymPtr(xlk),
+                                      x_key_state(ret_state));
+               break;
        }
-       break;
 
-#if FL_VERSION > 0 || FL_REVISION >= 89
        case FL_KEYRELEASE:
                lyxerr[Debug::WORKAREA] << "Workarea event: KEYRELEASE" << endl;
                break;
-#endif
 
-       case FL_FOCUS:
-               lyxerr[Debug::WORKAREA] << "Workarea event: FOCUS" << endl;
-               area->workAreaFocus();
-               break;
-       case FL_UNFOCUS:
-               lyxerr[Debug::WORKAREA] << "Workarea event: UNFOCUS" << endl;
-               area->workAreaUnfocus();
-               break;
        case FL_ENTER:
                lyxerr[Debug::WORKAREA] << "Workarea event: ENTER" << endl;
-               area->workAreaEnter();
+               fl_set_cursor(FL_ObjWin(area->work_area), XC_xterm);
                break;
+
        case FL_LEAVE:
                lyxerr[Debug::WORKAREA] << "Workarea event: LEAVE" << endl;
-               area->workAreaLeave();
+               // There should be no need for this. But there is.
+               fl_set_cursor(FL_ObjWin(area->work_area), FL_DEFAULT_CURSOR);
                break;
+
        case FL_DBLCLICK:
-               if (!ev) break;
-               lyxerr[Debug::WORKAREA] << "Workarea event: DBLCLICK" << endl;
-               area->workAreaDoubleClick(ev->xbutton.x - ob->x,
-                                         ev->xbutton.y - ob->y,
-                                         x_button_state(ev->xbutton.button));
+               if (ev) {
+                       if (ev->xbutton.button == 4 || ev->xbutton.button == 5) {
+                               // Ignore wheel events
+                               break;
+                       }
+
+
+                       lyxerr[Debug::WORKAREA] << "Workarea event: DBLCLICK" << endl;
+                       FuncRequest cmd(LFUN_MOUSE_DOUBLE,
+                                       ev->xbutton.x - ob->x,
+                                       ev->xbutton.y - ob->y,
+                                       x_button_state(key));
+                       area->dispatch(cmd);
+               }
                break;
+
        case FL_TRPLCLICK:
-               if (!ev) break;
-               lyxerr[Debug::WORKAREA] << "Workarea event: TRPLCLICK" << endl;
-               area->workAreaTripleClick(ev->xbutton.x - ob->x,
-                                         ev->xbutton.y - ob->y,
-                                         x_button_state(ev->xbutton.button));
+               if (ev) {
+                       if (ev->xbutton.button == 4 || ev->xbutton.button == 5) {
+                               // Ignore wheel events
+                               break;
+                       }
+
+                       lyxerr[Debug::WORKAREA] << "Workarea event: TRPLCLICK" << endl;
+                       FuncRequest cmd(LFUN_MOUSE_TRIPLE,
+                                       ev->xbutton.x - ob->x,
+                                       ev->xbutton.y - ob->y,
+                                       x_button_state(key));
+                       area->dispatch(cmd);
+               }
                break;
+
        case FL_OTHER:
-               if (!ev) break;
-               lyxerr[Debug::WORKAREA] << "Workarea event: OTHER" << endl;
+               if (ev)
+                       lyxerr[Debug::WORKAREA] << "Workarea event: OTHER" << endl;
                break;
        }
 
@@ -589,55 +612,47 @@ bool clipboard_read = false;
 
 extern "C" {
 
-       static
-       int request_clipboard_cb(FL_OBJECT * /*ob*/, long /*type*/,
-                                void const * data, long size)
-       {
-               clipboard_selection.erase();
-
-               if (size > 0)
-                       clipboard_selection.reserve(size);
-               for (int i = 0; i < size; ++i)
-                       clipboard_selection +=
-                               static_cast<char const *>(data)[i];
-               clipboard_read = true;
-               return 0;
-       }
-
+int request_clipboard_cb(FL_OBJECT * /*ob*/, long /*type*/,
+                        void const * data, long size)
+{
+       clipboard_selection.erase();
+
+       if (size > 0)
+               clipboard_selection.reserve(size);
+       for (int i = 0; i < size; ++i)
+               clipboard_selection += static_cast<char const *>(data)[i];
+       clipboard_read = true;
+       return 0;
 }
 
+} // extern "C"
 } // namespace anon
 
 
-int WorkArea::event_cb(XEvent * xev)
+int XWorkArea::event_cb(XEvent * xev)
 {
-       int ret = 0;
        switch (xev->type) {
-               case SelectionRequest:
-                       lyxerr[Debug::GUI] << "X requested selection." << endl;
-                       selectionRequested();
-                       break;
-               case SelectionClear:
-                       lyxerr[Debug::GUI] << "Lost selection." << endl;
-                       selectionLost();
-                       break;
+       case SelectionRequest:
+               lyxerr[Debug::GUI] << "X requested selection." << endl;
+               selectionRequested();
+               break;
+       case SelectionClear:
+               lyxerr[Debug::GUI] << "Lost selection." << endl;
+               selectionLost();
+               break;
        }
-       return ret;
+       return 0;
 }
 
 
-void WorkArea::haveSelection(bool yes) const
+void XWorkArea::haveSelection(bool yes) const
 {
-       if (!yes) {
-               XSetSelectionOwner(fl_get_display(), XA_PRIMARY, None, CurrentTime);
-               return;
-       }
-
-       XSetSelectionOwner(fl_get_display(), XA_PRIMARY, FL_ObjWin(work_area), CurrentTime);
+       Window const owner = yes ? FL_ObjWin(work_area) : None;
+       XSetSelectionOwner(fl_get_display(), XA_PRIMARY, owner, CurrentTime);
 }
 
 
-string const WorkArea::getClipboard() const
+string const XWorkArea::getClipboard() const
 {
        clipboard_read = false;
 
@@ -649,19 +664,23 @@ string const WorkArea::getClipboard() const
        while (!clipboard_read) {
                if (fl_check_forms() == FL_EVENT) {
                        fl_XNextEvent(&ev);
-                       lyxerr << "Received unhandled X11 event" << endl;
-                       lyxerr << "Type: 0x" << hex << ev.xany.type <<
-                               " Target: 0x" << hex << ev.xany.window << endl;
+                       lyxerr << "Received unhandled X11 event\n"
+                              << "Type: 0x" << hex << ev.xany.type
+                              << " Target: 0x" << hex << ev.xany.window
+                              << dec << endl;
                }
        }
        return clipboard_selection;
 }
 
 
-void WorkArea::putClipboard(string const & s) const
+void XWorkArea::putClipboard(string const & s) const
 {
        static string hold;
        hold = s;
 
        fl_stuff_clipboard(work_area, 0, hold.data(), hold.size(), 0);
 }
+
+} // namespace frontend
+} // namespace lyx