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Diffstat (limited to 'src/desktop-events.cpp')
| -rw-r--r-- | src/desktop-events.cpp | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/src/desktop-events.cpp b/src/desktop-events.cpp new file mode 100644 index 0000000..7ab2750 --- /dev/null +++ b/src/desktop-events.cpp @@ -0,0 +1,551 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** + * @file + * Event handlers for SPDesktop. + */ +/* Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * Abhishek Sharma + * + * Copyright (C) 1999-2002 Lauris Kaplinski + * Copyright (C) 1999-2010 Others + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <map> +#include <string> + +#include "desktop-events.h" + +#include <gdkmm/display.h> +#include <gdkmm/seat.h> + +#include <gtk/gtk.h> + +#include <glibmm/i18n.h> + +#include <2geom/line.h> +#include <2geom/angle.h> + +#include "desktop.h" +#include "document-undo.h" +#include "document.h" +#include "message-context.h" +#include "preferences.h" +#include "snap.h" + +#include "actions/actions-tools.h" + +#include "display/control/snap-indicator.h" +#include "display/control/canvas-item-guideline.h" + +#include "object/sp-guide.h" +#include "object/sp-namedview.h" +#include "object/sp-root.h" + +#include "ui/cursor-utils.h" +#include "ui/dialog-events.h" +#include "ui/dialog/guides.h" +#include "ui/event-debug.h" +#include "ui/tools/tool-base.h" +#include "ui/tools/node-tool.h" +#include "ui/tools/select-tool.h" +#include "ui/widget/canvas.h" + +#include "widgets/desktop-widget.h" + +#include "xml/repr.h" + +using Inkscape::DocumentUndo; + +static void snoop_extended(GdkEvent* event, SPDesktop *desktop); +static void init_extended(); + +/* Root canvas item handler */ + +bool sp_desktop_root_handler(GdkEvent *event, SPDesktop *desktop) +{ +#ifdef EVENT_DEBUG + ui_dump_event(reinterpret_cast<GdkEvent *>(event), "sp_desktop_root_handler"); +#endif + static bool watch = false; + static bool first = true; + + if ( first ) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if ( prefs->getBool("/options/useextinput/value", true) + && prefs->getBool("/options/switchonextinput/value") ) { + watch = true; + init_extended(); + } + first = false; + } + if ( watch ) { + snoop_extended(event, desktop); + } + + if (auto ec = desktop->event_context) { + return (bool)ec->start_root_handler(event); + } + return false; +} + + + +static Geom::Point drag_origin; +static SPGuideDragType drag_type = SP_DRAG_NONE; +//static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the +// // drag origin to that location so that constrained movement is more intuitive + +// Min distance from anchor to initiate rotation, measured in screenpixels +#define tol 40.0 + +bool sp_dt_guide_event(GdkEvent *event, Inkscape::CanvasItemGuideLine *guide_item, SPGuide *guide) +{ +#ifdef EVENT_DEBUG + ui_dump_event(reinterpret_cast<GdkEvent *>(event), "sp_dt_guide_event"); +#endif + + static bool moved = false; + bool ret = false; + + SPDesktop *desktop = guide_item->get_canvas()->get_desktop(); + if (!desktop) { + std::cerr << "sp_dt_guide_event: No desktop!" << std::endl; + return false; + } + // Limit to select tool only. + if (!dynamic_cast<Inkscape::UI::Tools::SelectTool *>(desktop->event_context) && + !dynamic_cast<Inkscape::UI::Tools::NodeTool *>(desktop->event_context)) { + return false; + } + + switch (event->type) { + case GDK_2BUTTON_PRESS: + if (event->button.button == 1) { + drag_type = SP_DRAG_NONE; + desktop->event_context->discard_delayed_snap_event(); + guide_item->ungrab(); + Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop); + ret = true; + } + break; + + case GDK_BUTTON_PRESS: + if (event->button.button == 1 && !guide->getLocked()) { + Geom::Point const event_w(event->button.x, event->button.y); + Geom::Point const event_dt(desktop->w2d(event_w)); + + // Due to the tolerance allowed when grabbing a guide, event_dt will generally + // be close to the guide but not just exactly on it. The drag origin calculated + // here must be exactly on the guide line though, otherwise + // small errors will occur once we snap, see + // https://bugs.launchpad.net/inkscape/+bug/333762 + drag_origin = Geom::projection(event_dt, Geom::Line(guide->getPoint(), guide->angle())); + + if (event->button.state & GDK_SHIFT_MASK) { + // with shift we rotate the guide + drag_type = SP_DRAG_ROTATE; + } else { + if (event->button.state & GDK_CONTROL_MASK) { + drag_type = SP_DRAG_MOVE_ORIGIN; + } else { + drag_type = SP_DRAG_TRANSLATE; + } + } + + if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) { + guide_item->grab((Gdk::BUTTON_RELEASE_MASK | + Gdk::BUTTON_PRESS_MASK | + Gdk::POINTER_MOTION_MASK ), + nullptr); + } + ret = true; + } + break; + + case GDK_MOTION_NOTIFY: + if (drag_type != SP_DRAG_NONE) { + Geom::Point const motion_w(event->motion.x, + event->motion.y); + Geom::Point motion_dt(desktop->w2d(motion_w)); + + sp_event_context_snap_delay_handler( + desktop->event_context, (void *) guide_item, (void *) guide, (GdkEventMotion *)event, + Inkscape::UI::Tools::DelayedSnapEvent::GUIDE_HANDLER); + + // This is for snapping while dragging existing guidelines. New guidelines, + // which are dragged off the ruler, are being snapped in sp_dt_ruler_event + SnapManager &m = desktop->namedview->snap_manager; + m.setup(desktop, true, guide, nullptr); + if (drag_type == SP_DRAG_MOVE_ORIGIN) { + // If we snap in guideConstrainedSnap() below, then motion_dt will + // be forced to be on the guide. If we don't snap however, then + // the origin should still be constrained to the guide. So let's do + // that explicitly first: + Geom::Line line(guide->getPoint(), guide->angle()); + Geom::Coord t = line.nearestTime(motion_dt); + motion_dt = line.pointAt(t); + if (!(event->motion.state & GDK_SHIFT_MASK)) { + m.guideConstrainedSnap(motion_dt, *guide); + } + } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) { + // cannot use shift here to disable snapping, because we already use it for rotating the guide + Geom::Point temp; + if (drag_type == SP_DRAG_ROTATE) { + temp = guide->getPoint(); + m.guideFreeSnap(motion_dt, temp, true, false); + guide->moveto(temp, false); + } else { + temp = guide->getNormal(); + m.guideFreeSnap(motion_dt, temp, false, true); + guide->set_normal(temp, false); + } + } + m.unSetup(); + + switch (drag_type) { + case SP_DRAG_TRANSLATE: + { + guide->moveto(motion_dt, false); + break; + } + case SP_DRAG_ROTATE: + { + Geom::Point pt = motion_dt - guide->getPoint(); + Geom::Angle angle(pt); + if (event->motion.state & GDK_CONTROL_MASK) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12)); + bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false); + if (snaps) { + if (relative_snaps) { + Geom::Angle orig_angle(guide->getNormal()); + Geom::Angle snap_angle = angle - orig_angle; + double sections = floor(snap_angle.radians0() * snaps / M_PI + .5); + angle = (M_PI / snaps) * sections + orig_angle.radians0(); + } else { + double sections = floor(angle.radians0() * snaps / M_PI + .5); + angle = (M_PI / snaps) * sections; + } + } + } + guide->set_normal(Geom::Point::polar(angle).cw(), false); + break; + } + case SP_DRAG_MOVE_ORIGIN: + { + guide->moveto(motion_dt, false); + break; + } + case SP_DRAG_NONE: + assert(false); + break; + } + moved = true; + desktop->set_coordinate_status(motion_dt); + desktop->getCanvas()->grab_focus(); + + ret = true; + } + break; + + case GDK_BUTTON_RELEASE: + if (drag_type != SP_DRAG_NONE && event->button.button == 1) { + desktop->event_context->discard_delayed_snap_event(); + + if (moved) { + Geom::Point const event_w(event->button.x, + event->button.y); + Geom::Point event_dt(desktop->w2d(event_w)); + SnapManager &m = desktop->namedview->snap_manager; + m.setup(desktop, true, guide, nullptr); + if (drag_type == SP_DRAG_MOVE_ORIGIN) { + // If we snap in guideConstrainedSnap() below, then motion_dt will + // be forced to be on the guide. If we don't snap however, then + // the origin should still be constrained to the guide. So let's + // do that explicitly first: + Geom::Line line(guide->getPoint(), guide->angle()); + Geom::Coord t = line.nearestTime(event_dt); + event_dt = line.pointAt(t); + if (!(event->button.state & GDK_SHIFT_MASK)) { + m.guideConstrainedSnap(event_dt, *guide); + } + } else if (!((drag_type == SP_DRAG_ROTATE) && (event->motion.state & GDK_CONTROL_MASK))) { + // cannot use shift here to disable snapping, because we already use it for rotating the guide + Geom::Point temp; + if (drag_type == SP_DRAG_ROTATE) { + temp = guide->getPoint(); + m.guideFreeSnap(event_dt, temp, true, false); + guide->moveto(temp, false); + } else { + temp = guide->getNormal(); + m.guideFreeSnap(event_dt, temp, false, true); + guide->set_normal(temp, false); + } + } + m.unSetup(); + + if (guide_item->get_canvas()->world_point_inside_canvas(event_w)) { + switch (drag_type) { + case SP_DRAG_TRANSLATE: + { + guide->moveto(event_dt, true); + break; + } + case SP_DRAG_ROTATE: + { + Geom::Point pt = event_dt - guide->getPoint(); + Geom::Angle angle(pt); + if (event->motion.state & GDK_CONTROL_MASK) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12)); + bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false); + if (snaps) { + if (relative_snaps) { + Geom::Angle orig_angle(guide->getNormal()); + Geom::Angle snap_angle = angle - orig_angle; + double sections = floor(snap_angle.radians0() * snaps / M_PI + .5); + angle = (M_PI / snaps) * sections + orig_angle.radians0(); + } else { + double sections = floor(angle.radians0() * snaps / M_PI + .5); + angle = (M_PI / snaps) * sections; + } + } + } + guide->set_normal(Geom::Point::polar(angle).cw(), true); + break; + } + case SP_DRAG_MOVE_ORIGIN: + { + guide->moveto(event_dt, true); + break; + } + case SP_DRAG_NONE: + assert(false); + break; + } + DocumentUndo::done(desktop->getDocument(), _("Move guide"), ""); + } else { + /* Undo movement of any attached shapes. */ + guide->moveto(guide->getPoint(), false); + guide->set_normal(guide->getNormal(), false); + guide->remove(); + guide_item = nullptr; + desktop->event_context->use_tool_cursor(); + + DocumentUndo::done(desktop->getDocument(), _("Delete guide"), ""); + } + moved = false; + desktop->set_coordinate_status(event_dt); + } + drag_type = SP_DRAG_NONE; + if (guide_item) { + guide_item->ungrab(); + } + ret = true; + } + break; + + case GDK_ENTER_NOTIFY: + { + // This is a UX thing. Check if the canvas has focus, so the user knows they can + // use hotkeys. See issue: https://gitlab.com/inkscape/inkscape/-/issues/2439 + if (!guide->getLocked() && desktop->getCanvas()->has_focus()) { + guide_item->set_stroke(guide->getHiColor()); + } + + // set move or rotate cursor + Geom::Point const event_w(event->crossing.x, event->crossing.y); + + auto display = desktop->getCanvas()->get_display(); + auto window = desktop->getCanvas()->get_window(); + + Glib::RefPtr<Gdk::Cursor> cursor; + if (guide->getLocked()) { + cursor = Inkscape::load_svg_cursor(display, window, "select.svg"); + } else if ((event->crossing.state & GDK_SHIFT_MASK) && (drag_type != SP_DRAG_MOVE_ORIGIN)) { + cursor = Inkscape::load_svg_cursor(display, window, "rotate.svg"); + } else { + cursor = Gdk::Cursor::create(display, "grab"); + } + window->set_cursor(cursor); + + char *guide_description = guide->description(); + desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description); + g_free(guide_description); + break; + } + + case GDK_LEAVE_NOTIFY: + + guide_item->set_stroke(guide->getColor()); + + // restore event context's cursor + desktop->event_context->use_tool_cursor(); + + desktop->guidesMessageContext()->clear(); + break; + + case GDK_KEY_PRESS: + switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) { + case GDK_KEY_Delete: + case GDK_KEY_KP_Delete: + case GDK_KEY_BackSpace: + { + SPDocument *doc = guide->document; + if (!guide->getLocked()) { + guide->remove(); + guide_item = nullptr; + DocumentUndo::done(doc, _("Delete guide"), ""); + ret = true; + desktop->event_context->discard_delayed_snap_event(); + desktop->event_context->use_tool_cursor(); + } + break; + } + case GDK_KEY_Shift_L: + case GDK_KEY_Shift_R: + if (drag_type != SP_DRAG_MOVE_ORIGIN) { + + auto display = desktop->getCanvas()->get_display(); + auto window = desktop->getCanvas()->get_window(); + + auto cursor = Inkscape::load_svg_cursor(display, window, "rotate.svg"); + window->set_cursor(cursor); + ret = true; + break; + } + + default: + // do nothing; + break; + } + break; + + case GDK_KEY_RELEASE: + switch (Inkscape::UI::Tools::get_latin_keyval (&event->key)) { + case GDK_KEY_Shift_L: + case GDK_KEY_Shift_R: + { + auto display = Gdk::Display::get_default(); + auto guide_cursor = Gdk::Cursor::create(display, "grab"); + desktop->getCanvas()->get_window()->set_cursor(guide_cursor); + break; + } + default: + // do nothing; + break; + } + break; + + default: + break; + } + + return ret; +} + +static std::map<std::string, Glib::ustring> toolToUse; +static std::string lastName; +static GdkInputSource lastType = GDK_SOURCE_MOUSE; + +static void init_extended() +{ + Glib::ustring avoidName("pad"); + auto display = Gdk::Display::get_default(); + auto seat = display->get_default_seat(); + auto const devices = seat->get_slaves(Gdk::SEAT_CAPABILITY_ALL); + + if ( !devices.empty() ) { + for (auto const &dev : devices) { + auto const devName = dev->get_name(); + auto devSrc = dev->get_source(); + + if ( !devName.empty() + && (avoidName != devName) + && (devSrc != Gdk::SOURCE_MOUSE) ) { +// g_message("Adding '%s' as [%d]", devName, devSrc); + + // Set the initial tool for the device + switch ( devSrc ) { + case Gdk::SOURCE_PEN: + toolToUse[devName] = "Calligraphic"; + break; + case Gdk::SOURCE_ERASER: + toolToUse[devName] = "Eraser"; + break; + case Gdk::SOURCE_CURSOR: + toolToUse[devName] = "Select"; + break; + default: + ; // do not add + } +// } else if (devName) { +// g_message("Skippn '%s' as [%d]", devName, devSrc); + } + } + } +} + + +void snoop_extended(GdkEvent* event, SPDesktop *desktop) +{ + GdkDevice *source_device = gdk_event_get_source_device (event); + GdkInputSource source = GDK_SOURCE_MOUSE; + std::string name; + + if (! source_device) return; + switch ( event->type ) { + case GDK_MOTION_NOTIFY: + case GDK_BUTTON_PRESS: + case GDK_2BUTTON_PRESS: + case GDK_3BUTTON_PRESS: + case GDK_BUTTON_RELEASE: + case GDK_SCROLL: + case GDK_PROXIMITY_IN: + case GDK_PROXIMITY_OUT: + // fix to previous code using event->device that did not point to original device that generated the event. + source = gdk_device_get_source(source_device); + name = gdk_device_get_name(source_device); + + break; + + default: + ; + } + + + if (!name.empty()) { + if ( lastType != source || lastName != name ) { + // The device switched. See if it is one we 'count' + //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str()); + auto it = toolToUse.find(lastName); + if (it != toolToUse.end()) { + // Save the tool currently selected for next time the input + // device shows up. + it->second = get_active_tool(desktop); + } + + it = toolToUse.find(name); + if (it != toolToUse.end() ) { + set_active_tool(desktop, it->second); + } + + lastName = name; + lastType = source; + } + } +} +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : + |