X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=libs%2Fcanvas%2Fcanvas.cc;h=0fcac6a317c63d727703c8221d77a1836f06ee45;hb=5bdc869e498d13cfa7dbd004ae41e6524fc94029;hp=86d7e7d6fc91817383ac272d65960539b81dbba1;hpb=cf075743e445ac38c2d0226c8a12bd9178990484;p=ardour.git diff --git a/libs/canvas/canvas.cc b/libs/canvas/canvas.cc index 86d7e7d6fc..0fcac6a317 100644 --- a/libs/canvas/canvas.cc +++ b/libs/canvas/canvas.cc @@ -18,6 +18,10 @@ */ +#if !defined USE_CAIRO_IMAGE_SURFACE && !defined NDEBUG +#define OPTIONAL_CAIRO_IMAGE_SURFACE +#endif + /** @file canvas/canvas.cc * @brief Implementation of the main canvas classes. */ @@ -26,21 +30,27 @@ #include #include #include +#include #include "pbd/compose.h" #include "pbd/stacktrace.h" #include "canvas/canvas.h" +#include "canvas/colors.h" #include "canvas/debug.h" #include "canvas/line.h" #include "canvas/scroll_group.h" +#include "canvas/utils.h" using namespace std; using namespace ArdourCanvas; +uint32_t Canvas::tooltip_timeout_msecs = 750; + /** Construct a new Canvas */ Canvas::Canvas () : _root (this) + , _bg_color (rgba_to_color (0, 1.0, 0.0, 1.0)) { set_epoch (); } @@ -62,7 +72,7 @@ Canvas::scroll_to (Coord x, Coord y) (*i)->scroll_to (Duple (x, y)); } - pick_current_item (0); // no current mouse position + pick_current_item (0); // no current mouse position } void @@ -94,7 +104,7 @@ Canvas::render (Rect const & area, Cairo::RefPtr const & context #endif render_count = 0; - + boost::optional root_bbox = _root.bounding_box(); if (!root_bbox) { /* the root has no bounding box, so there's nothing to render */ @@ -103,14 +113,14 @@ Canvas::render (Rect const & area, Cairo::RefPtr const & context boost::optional draw = root_bbox->intersection (area); if (draw) { - + /* there's a common area between the root and the requested area, so render it. */ _root.render (*draw, context); -#ifdef CANVAS_DEBUG +#if defined CANVAS_DEBUG && !PLATFORM_WINDOWS if (getenv ("CANVAS_HARLEQUIN_DEBUGGING")) { // This transparently colors the rect being rendered, after it has been drawn. double r = (random() % 65536) /65536.0; @@ -134,7 +144,7 @@ operator<< (ostream& o, Canvas& c) std::string Canvas::indent() const -{ +{ string s; for (int n = 0; n < ArdourCanvas::dump_depth; ++n) { @@ -146,7 +156,7 @@ Canvas::indent() const std::string Canvas::render_indent() const -{ +{ string s; for (int n = 0; n < ArdourCanvas::render_depth; ++n) { @@ -161,7 +171,7 @@ Canvas::dump (ostream& o) const { dump_depth = 0; _root.dump (o); -} +} /** Called when an item has been shown or hidden. * @param item Item that has been shown or hidden. @@ -200,7 +210,7 @@ Canvas::item_visual_property_changed (Item* item) void Canvas::item_changed (Item* item, boost::optional pre_change_bounding_box) { - + Rect window_bbox = visible_area (); if (pre_change_bounding_box) { @@ -213,7 +223,7 @@ Canvas::item_changed (Item* item, boost::optional pre_change_bounding_box) boost::optional post_change_bounding_box = item->bounding_box (); if (post_change_bounding_box) { - + if (item->item_to_window (*post_change_bounding_box).intersection (window_bbox)) { /* request a redraw of the item's new bounding box */ queue_draw_item_area (item, post_change_bounding_box.get ()); @@ -224,12 +234,7 @@ Canvas::item_changed (Item* item, boost::optional pre_change_bounding_box) Duple Canvas::window_to_canvas (Duple const & d) const { - /* Find the scroll group that covers d (a window coordinate). Scroll groups are only allowed - * as children of the root group, so we just scan its first level - * children and see what we can find. - */ - - std::list const& root_children (_root.items()); + ScrollGroup* best_group = 0; ScrollGroup* sg = 0; /* if the coordinates are negative, clamp to zero and find the item @@ -245,14 +250,33 @@ Canvas::window_to_canvas (Duple const & d) const in_window.y = 0; } - for (std::list::const_iterator i = root_children.begin(); i != root_children.end(); ++i) { - if (((sg = dynamic_cast(*i)) != 0) && sg->covers_window (in_window)) { - break; + for (list::const_iterator s = scrollers.begin(); s != scrollers.end(); ++s) { + + if ((*s)->covers_window (in_window)) { + sg = *s; + + /* XXX January 22nd 2015: leaving this in place for now + * but I think it fixes a bug that really should be + * fixed in a different way (and will be) by my next + * commit. But it may still be relevant. + */ + + /* If scroll groups overlap, choose the one with the highest sensitivity, + that is, choose an HV scroll group over an H or V + only group. + */ + if (!best_group || sg->sensitivity() > best_group->sensitivity()) { + best_group = sg; + if (sg->sensitivity() == (ScrollGroup::ScrollsVertically | ScrollGroup::ScrollsHorizontally)) { + /* Can't do any better than this. */ + break; + } + } } } - if (sg) { - return d.translate (sg->scroll_offset()); + if (best_group) { + return d.translate (best_group->scroll_offset()); } return d; @@ -275,7 +299,6 @@ Canvas::canvas_to_window (Duple const & d, bool rounded) const break; } } - if (sg) { wd = d.translate (-sg->scroll_offset()); @@ -331,16 +354,46 @@ Canvas::queue_draw_item_area (Item* item, Rect area) request_redraw (item->item_to_window (area)); } +void +Canvas::set_tooltip_timeout (uint32_t msecs) +{ + tooltip_timeout_msecs = msecs; +} + +void +Canvas::set_background_color (Color c) +{ + _bg_color = c; + + boost::optional r = _root.bounding_box(); + + if (r) { + request_redraw (_root.item_to_window (r.get())); + } +} + +void +GtkCanvas::re_enter () +{ + DEBUG_TRACE (PBD::DEBUG::CanvasEnterLeave, "re-enter canvas by request\n"); + _current_item = 0; + pick_current_item (0); +} + /** Construct a GtkCanvas */ GtkCanvas::GtkCanvas () : _current_item (0) , _new_current_item (0) , _grabbed_item (0) , _focused_item (0) + , _single_exposure (1) + , current_tooltip_item (0) + , tooltip_window (0) { /* these are the events we want to know about */ add_events (Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK | Gdk::POINTER_MOTION_MASK | - Gdk::SCROLL_MASK | Gdk::ENTER_NOTIFY_MASK | Gdk::LEAVE_NOTIFY_MASK); + Gdk::SCROLL_MASK | Gdk::ENTER_NOTIFY_MASK | Gdk::LEAVE_NOTIFY_MASK | + Gdk::KEY_PRESS_MASK | Gdk::KEY_RELEASE_MASK); } void @@ -353,7 +406,7 @@ GtkCanvas::pick_current_item (int state) * added or removed, so we have no coordinates to work from as is the * case with a motion event. Find out where the mouse is and use that. */ - + Glib::RefPtr pointer_window = Gdk::Display::get_default()->get_window_at_pointer (x, y); if (pointer_window != get_window()) { @@ -387,9 +440,9 @@ GtkCanvas::pick_current_item (Duple const & point, int state) if (DEBUG_ENABLED(PBD::DEBUG::CanvasEnterLeave)) { for (vector::const_iterator it = items.begin(); it != items.end(); ++it) { #ifdef CANVAS_DEBUG - std::cerr << "\tItem " << (*it)->whatami() << '/' << (*it)->name << std::endl; + std::cerr << "\tItem " << (*it)->whatami() << '/' << (*it)->name << " ignore events ? " << (*it)->ignore_events() << " vis ? " << (*it)->visible() << std::endl; #else - std::cerr << "\tItem " << (*it)->whatami() << std::endl; + std::cerr << "\tItem " << (*it)->whatami() << '/' << " ignore events ? " << (*it)->ignore_events() << " vis ? " << (*it)->visible() << std::endl; #endif } } @@ -400,7 +453,7 @@ GtkCanvas::pick_current_item (Duple const & point, int state) top, but we're going to reverse that for within_items so that its first item is the upper-most item that can be chosen as _current_item. */ - + vector::const_iterator i; list within_items; @@ -427,15 +480,23 @@ GtkCanvas::pick_current_item (Duple const & point, int state) if (within_items.front() == _current_item) { /* uppermost item at point is already _current_item */ + DEBUG_TRACE (PBD::DEBUG::CanvasEnterLeave, string_compose ("CURRENT ITEM %1/%2\n", _new_current_item->whatami(), _current_item->name)); return; } - + _new_current_item = const_cast (within_items.front()); } if (_new_current_item != _current_item) { deliver_enter_leave (point, state); } + + if (_current_item) { + DEBUG_TRACE (PBD::DEBUG::CanvasEnterLeave, string_compose ("CURRENT ITEM %1/%2\n", _new_current_item->whatami(), _current_item->name)); + } else { + DEBUG_TRACE (PBD::DEBUG::CanvasEnterLeave, "--- no current item\n"); + } + } /** Deliver a series of enter & leave events based on the pointer position being at window @@ -446,9 +507,15 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) { /* setup enter & leave event structures */ + Glib::RefPtr win = get_window(); + + if (!win) { + return; + } + GdkEventCrossing enter_event; enter_event.type = GDK_ENTER_NOTIFY; - enter_event.window = get_window()->gobj(); + enter_event.window = win->gobj(); enter_event.send_event = 0; enter_event.subwindow = 0; enter_event.mode = GDK_CROSSING_NORMAL; @@ -458,7 +525,7 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) /* Events delivered to canvas items are expected to be in canvas * coordinates but @param point is in window coordinates. */ - + Duple c = window_to_canvas (point); enter_event.x = c.x; enter_event.y = c.y; @@ -467,8 +534,8 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) leave_event.type = GDK_LEAVE_NOTIFY; Item* i; - GdkNotifyType enter_detail; - GdkNotifyType leave_detail; + GdkNotifyType enter_detail = GDK_NOTIFY_UNKNOWN; + GdkNotifyType leave_detail = GDK_NOTIFY_UNKNOWN; vector items_to_leave_virtual; vector items_to_enter_virtual; @@ -492,7 +559,7 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) enter_detail = GDK_NOTIFY_UNKNOWN; /* no current item, so also send virtual enter events to the - * entire heirarchy for the new item + * entire heirarchy for the new item */ for (i = _new_current_item->parent(); i ; i = i->parent()) { @@ -502,12 +569,12 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) } else if (_current_item->is_descendant_of (*_new_current_item)) { /* move from descendant to ancestor (X: "_current_item is an - * inferior ("child") of _new_current_item") + * inferior ("child") of _new_current_item") * * Deliver "virtual" leave notifications to all items in the * heirarchy between current and new_current. */ - + for (i = _current_item->parent(); i && i != _new_current_item; i = i->parent()) { items_to_leave_virtual.push_back (i); } @@ -553,7 +620,7 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) enter_detail = GDK_NOTIFY_NONLINEAR; leave_detail = GDK_NOTIFY_NONLINEAR; } - + if (_current_item && !_current_item->ignore_events ()) { leave_event.detail = leave_detail; @@ -582,6 +649,7 @@ GtkCanvas::deliver_enter_leave (Duple const & point, int state) if (_new_current_item && !_new_current_item->ignore_events()) { enter_event.detail = enter_detail; DEBUG_TRACE (PBD::DEBUG::CanvasEnterLeave, string_compose ("ENTER %1/%2\n", _new_current_item->whatami(), _new_current_item->name)); + start_tooltip_timeout (_new_current_item); _new_current_item->Event ((GdkEvent*)&enter_event); } @@ -617,22 +685,22 @@ GtkCanvas::deliver_event (GdkEvent* event) /* run through the items from child to parent, until one claims the event */ Item* item = const_cast (event_item); - + while (item) { Item* parent = item->parent (); - if (!item->ignore_events () && + if (!item->ignore_events () && item->Event (event)) { /* this item has just handled the event */ DEBUG_TRACE ( PBD::DEBUG::CanvasEvents, string_compose ("canvas event handled by %1 %2\n", item->whatami(), item->name.empty() ? "[unknown]" : item->name) ); - + return true; } - + DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas event %3 left unhandled by %1 %2\n", item->whatami(), item->name.empty() ? "[unknown]" : item->name, event_type_string (event->type))); if ((item = parent) == 0) { @@ -654,7 +722,7 @@ GtkCanvas::item_going_away (Item* item, boost::optional bounding_box) if (bounding_box) { queue_draw_item_area (item, bounding_box.get ()); } - + if (_new_current_item == item) { _new_current_item = 0; } @@ -667,18 +735,41 @@ GtkCanvas::item_going_away (Item* item, boost::optional bounding_box) _focused_item = 0; } + if (current_tooltip_item) { + current_tooltip_item = 0; + stop_tooltip_timeout (); + } + ScrollGroup* sg = dynamic_cast(item); if (sg) { scrollers.remove (sg); } if (_current_item == item) { - /* no need to send a leave event to this item, since it is going away + /* no need to send a leave event to this item, since it is going away */ _current_item = 0; pick_current_item (0); // no mouse state } - + +} + +void +GtkCanvas::on_size_allocate (Gtk::Allocation& a) +{ + EventBox::on_size_allocate (a); +#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE + if (getenv("ARDOUR_IMAGE_SURFACE")) { +#endif +#if defined USE_CAIRO_IMAGE_SURFACE || defined OPTIONAL_CAIRO_IMAGE_SURFACE + /* allocate an image surface as large as the canvas itself */ + + canvas_image.clear (); + canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, a.get_width(), a.get_height()); +#endif +#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE + } +#endif } /** Handler for GDK expose events. @@ -688,21 +779,69 @@ GtkCanvas::item_going_away (Item* item, boost::optional bounding_box) bool GtkCanvas::on_expose_event (GdkEventExpose* ev) { - Cairo::RefPtr cairo_context = get_window()->create_cairo_context (); - render (Rect (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height), cairo_context); - return true; -} +#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE + Cairo::RefPtr draw_context; + Cairo::RefPtr window_context; + if (getenv("ARDOUR_IMAGE_SURFACE")) { + if (!canvas_image) { + canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height()); + } + draw_context = Cairo::Context::create (canvas_image); + window_context = get_window()->create_cairo_context (); + } else { + draw_context = get_window()->create_cairo_context (); + } +#elif defined USE_CAIRO_IMAGE_SURFACE + if (!canvas_image) { + canvas_image = Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, get_width(), get_height()); + } + Cairo::RefPtr draw_context = Cairo::Context::create (canvas_image); + Cairo::RefPtr window_context = get_window()->create_cairo_context (); +#else + Cairo::RefPtr draw_context = get_window()->create_cairo_context (); +#endif -/** @return Our Cairo context, or 0 if we don't have one */ -Cairo::RefPtr -GtkCanvas::context () -{ - Glib::RefPtr w = get_window (); - if (!w) { - return Cairo::RefPtr (); + /* draw background color */ + + draw_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height); + draw_context->clip_preserve (); + set_source_rgba (draw_context, _bg_color); + draw_context->fill (); + + /* render canvas */ + if ( _single_exposure ) { + + render (Rect (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height), draw_context); + + } else { + GdkRectangle* rects; + gint nrects; + + gdk_region_get_rectangles (ev->region, &rects, &nrects); + for (gint n = 0; n < nrects; ++n) { + draw_context->set_identity_matrix(); //reset the cairo matrix, just in case someone left it transformed after drawing ( cough ) + render (Rect (rects[n].x, rects[n].y, rects[n].x + rects[n].width, rects[n].y + rects[n].height), draw_context); + } + g_free (rects); + } + +#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE + if (getenv("ARDOUR_IMAGE_SURFACE")) { +#endif +#if defined USE_CAIRO_IMAGE_SURFACE || defined OPTIONAL_CAIRO_IMAGE_SURFACE + /* now blit our private surface back to the GDK one */ + + window_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height); + window_context->clip (); + window_context->set_source (canvas_image, 0, 0); + window_context->set_operator (Cairo::OPERATOR_SOURCE); + window_context->paint (); +#endif +#ifdef OPTIONAL_CAIRO_IMAGE_SURFACE } +#endif - return w->create_cairo_context (); + return true; } /** Handler for GDK scroll events. @@ -717,12 +856,12 @@ GtkCanvas::on_scroll_event (GdkEventScroll* ev) GdkEvent copy = *((GdkEvent*)ev); Duple winpos = Duple (ev->x, ev->y); Duple where = window_to_canvas (winpos); - + pick_current_item (winpos, ev->state); copy.button.x = where.x; copy.button.y = where.y; - + /* Coordinates in the event will be canvas coordinates, correctly adjusted for scroll if this GtkCanvas is in a GtkCanvasViewport. */ @@ -731,6 +870,28 @@ GtkCanvas::on_scroll_event (GdkEventScroll* ev) return deliver_event (reinterpret_cast(©)); } +/** Handler for GDK key press events. + * @param ev Event. + * @return true if the event was handled. + */ +bool +GtkCanvas::on_key_press_event (GdkEventKey* ev) +{ + DEBUG_TRACE (PBD::DEBUG::CanvasEvents, "canvas key press\n"); + return deliver_event (reinterpret_cast(ev)); +} + +/** Handler for GDK key release events. + * @param ev Event. + * @return true if the event was handled. + */ +bool +GtkCanvas::on_key_release_event (GdkEventKey* ev) +{ + DEBUG_TRACE (PBD::DEBUG::CanvasEvents, "canvas key release\n"); + return deliver_event (reinterpret_cast(ev)); +} + /** Handler for GDK button press events. * @param ev Event. * @return true if the event was handled. @@ -743,17 +904,17 @@ GtkCanvas::on_button_press_event (GdkEventButton* ev) GdkEvent copy = *((GdkEvent*)ev); Duple winpos = Duple (ev->x, ev->y); Duple where = window_to_canvas (winpos); - + pick_current_item (winpos, ev->state); copy.button.x = where.x; copy.button.y = where.y; - + /* Coordinates in the event will be canvas coordinates, correctly adjusted for scroll if this GtkCanvas is in a GtkCanvasViewport. */ - DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas button press @ %1, %2 => %3\n", ev->x, ev->y, where)); + DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas button press %1 @ %2, %3 => %4\n", ev->button, ev->x, ev->y, where)); return deliver_event (reinterpret_cast(©)); } @@ -763,13 +924,13 @@ GtkCanvas::on_button_press_event (GdkEventButton* ev) */ bool GtkCanvas::on_button_release_event (GdkEventButton* ev) -{ +{ /* translate event coordinates from window to canvas */ GdkEvent copy = *((GdkEvent*)ev); Duple winpos = Duple (ev->x, ev->y); Duple where = window_to_canvas (winpos); - + pick_current_item (winpos, ev->state); copy.button.x = where.x; @@ -779,7 +940,7 @@ GtkCanvas::on_button_release_event (GdkEventButton* ev) for scroll if this GtkCanvas is in a GtkCanvasViewport. */ - DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas button release @ %1, %2 => %3\n", ev->x, ev->y, where)); + DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas button release %1 @ %2, %3 => %4\n", ev->button, ev->x, ev->y, where)); return deliver_event (reinterpret_cast(©)); } @@ -812,6 +973,8 @@ GtkCanvas::get_mouse_position (Duple& winpos) const bool GtkCanvas::on_motion_notify_event (GdkEventMotion* ev) { + hide_tooltip (); + /* translate event coordinates from window to canvas */ GdkEvent copy = *((GdkEvent*)ev); @@ -821,7 +984,7 @@ GtkCanvas::on_motion_notify_event (GdkEventMotion* ev) copy.motion.x = where.x; copy.motion.y = where.y; - /* Coordinates in "copy" will be canvas coordinates, + /* Coordinates in "copy" will be canvas coordinates, */ DEBUG_TRACE (PBD::DEBUG::CanvasEvents, string_compose ("canvas motion @ %1, %2 canvas @ %3, %4\n", ev->x, ev->y, copy.motion.x, copy.motion.y)); @@ -849,6 +1012,22 @@ GtkCanvas::on_enter_notify_event (GdkEventCrossing* ev) bool GtkCanvas::on_leave_notify_event (GdkEventCrossing* ev) { + switch (ev->detail) { + case GDK_NOTIFY_ANCESTOR: + case GDK_NOTIFY_UNKNOWN: + case GDK_NOTIFY_VIRTUAL: + case GDK_NOTIFY_NONLINEAR: + case GDK_NOTIFY_NONLINEAR_VIRTUAL: + /* leaving window, cancel any tooltips */ + stop_tooltip_timeout (); + hide_tooltip (); + break; + default: + /* we don't care about any other kind + of leave event (notably GDK_NOTIFY_INFERIOR) + */ + break; + } _new_current_item = 0; deliver_enter_leave (Duple (ev->x, ev->y), ev->state); return true; @@ -952,6 +1131,123 @@ GtkCanvas::height() const return get_allocation().get_height(); } +void +GtkCanvas::start_tooltip_timeout (Item* item) +{ + stop_tooltip_timeout (); + + if (item) { + current_tooltip_item = item; + + /* wait for the first idle that happens after this is + called. this means that we've stopped processing events, which + in turn implies that the user has stopped doing stuff for a + little while. + */ + + Glib::signal_idle().connect (sigc::mem_fun (*this, &GtkCanvas::really_start_tooltip_timeout)); + } +} + +bool +GtkCanvas::really_start_tooltip_timeout () +{ + /* an idle has occured since we entered a tooltip-bearing widget. Now + * wait 1 second and if the timeout isn't cancelled, show the tooltip. + */ + + if (current_tooltip_item) { + tooltip_timeout_connection = Glib::signal_timeout().connect (sigc::mem_fun (*this, &GtkCanvas::show_tooltip), tooltip_timeout_msecs); + } + + return false; /* this is called from an idle callback, don't call it again */ +} + +void +GtkCanvas::stop_tooltip_timeout () +{ + current_tooltip_item = 0; + tooltip_timeout_connection.disconnect (); +} + +bool +GtkCanvas::show_tooltip () +{ + Rect tooltip_item_bbox; + + if (!current_tooltip_item || current_tooltip_item->tooltip().empty() || !current_tooltip_item->bounding_box()) { + return false; + } + + if (!tooltip_window) { + tooltip_window = new Gtk::Window (Gtk::WINDOW_POPUP); + tooltip_label = manage (new Gtk::Label); + tooltip_label->show (); + tooltip_window->add (*tooltip_label); + tooltip_window->set_border_width (1); + tooltip_window->set_name ("tooltip"); + } + + tooltip_label->set_text (current_tooltip_item->tooltip()); + + /* figure out where to position the tooltip */ + + Gtk::Widget* toplevel = get_toplevel(); + assert (toplevel); + int pointer_x, pointer_y; + Gdk::ModifierType mask; + + (void) toplevel->get_window()->get_pointer (pointer_x, pointer_y, mask); + + Duple tooltip_window_origin (pointer_x, pointer_y); + + /* convert to root window coordinates */ + + int win_x, win_y; + dynamic_cast(toplevel)->get_position (win_x, win_y); + + tooltip_window_origin = tooltip_window_origin.translate (Duple (win_x, win_y)); + + /* we don't want the pointer to be inside the window when it is + * displayed, because then we generate a leave/enter event pair when + * the window is displayed then hidden - the enter event will + * trigger a new tooltip timeout. + * + * So move the window right of the pointer position by just a enough + * to get it away from the pointer. + */ + + tooltip_window_origin.x += 30; + tooltip_window_origin.y += 45; + + /* move the tooltip window into position */ + + tooltip_window->move (tooltip_window_origin.x, tooltip_window_origin.y); + + /* ready to show */ + + tooltip_window->present (); + + /* called from a timeout handler, don't call it again */ + + return false; +} + +void +GtkCanvas::hide_tooltip () +{ + /* hide it if its there */ + + if (tooltip_window) { + tooltip_window->hide (); + + // Delete the tooltip window so it'll get re-created + // (i.e. properly re-sized) on the next usage. + delete tooltip_window; + tooltip_window = NULL; + } +} + /** Create a GtkCanvaSViewport. * @param hadj Adjustment to use for horizontal scrolling. * @param vadj Adjustment to use for vertica scrolling. @@ -981,7 +1277,7 @@ void GtkCanvasViewport::on_size_request (Gtk::Requisition* req) { /* force the canvas to size itself */ - // _canvas.root()->bounding_box(); + // _canvas.root()->bounding_box(); req->width = 16; req->height = 16;