#define __SP_RECT_CONTEXT_C__ /* * Rectangle drawing context * * Author: * Lauris Kaplinski <lauris@kaplinski.com> * bulia byak <buliabyak@users.sf.net> * * Copyright (C) 2006 Johan Engelen <johan@shouraizou.nl> * Copyright (C) 2000-2005 authors * Copyright (C) 2000-2001 Ximian, Inc. * * Released under GNU GPL, read the file 'COPYING' for more information */ #include "config.h" #include <gdk/gdkkeysyms.h> #include <cstring> #include <string> #include "macros.h" #include "display/sp-canvas.h" #include "sp-rect.h" #include "document.h" #include "sp-namedview.h" #include "selection.h" #include "selection-chemistry.h" #include "desktop-handles.h" #include "snap.h" #include "desktop.h" #include "desktop-style.h" #include "message-context.h" #include "pixmaps/cursor-rect.xpm" #include "rect-context.h" #include "sp-metrics.h" #include <glibmm/i18n.h> #include "object-edit.h" #include "xml/repr.h" #include "xml/node-event-vector.h" #include "preferences.h" #include "context-fns.h" #include "shape-editor.h" //static const double goldenratio = 1.61803398874989484820; // golden ratio static void sp_rect_context_class_init(SPRectContextClass *klass); static void sp_rect_context_init(SPRectContext *rect_context); static void sp_rect_context_dispose(GObject *object); static void sp_rect_context_setup(SPEventContext *ec); static void sp_rect_context_finish(SPEventContext *ec); static void sp_rect_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val); static gint sp_rect_context_root_handler(SPEventContext *event_context, GdkEvent *event); static gint sp_rect_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event); static void sp_rect_drag(SPRectContext &rc, Geom::Point const pt, guint state); static void sp_rect_finish(SPRectContext *rc); static void sp_rect_cancel(SPRectContext *rc); static SPEventContextClass *parent_class; GtkType sp_rect_context_get_type() { static GType type = 0; if (!type) { GTypeInfo info = { sizeof(SPRectContextClass), NULL, NULL, (GClassInitFunc) sp_rect_context_class_init, NULL, NULL, sizeof(SPRectContext), 4, (GInstanceInitFunc) sp_rect_context_init, NULL, /* value_table */ }; type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPRectContext", &info, (GTypeFlags) 0); } return type; } static void sp_rect_context_class_init(SPRectContextClass *klass) { GObjectClass *object_class = (GObjectClass *) klass; SPEventContextClass *event_context_class = (SPEventContextClass *) klass; parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass); object_class->dispose = sp_rect_context_dispose; event_context_class->setup = sp_rect_context_setup; event_context_class->finish = sp_rect_context_finish; event_context_class->set = sp_rect_context_set; event_context_class->root_handler = sp_rect_context_root_handler; event_context_class->item_handler = sp_rect_context_item_handler; } static void sp_rect_context_init(SPRectContext *rect_context) { SPEventContext *event_context = SP_EVENT_CONTEXT(rect_context); event_context->cursor_shape = cursor_rect_xpm; event_context->hot_x = 4; event_context->hot_y = 4; event_context->xp = 0; event_context->yp = 0; event_context->tolerance = 0; event_context->within_tolerance = false; event_context->item_to_select = NULL; rect_context->item = NULL; rect_context->rx = 0.0; rect_context->ry = 0.0; new (&rect_context->sel_changed_connection) sigc::connection(); } static void sp_rect_context_finish(SPEventContext *ec) { SPRectContext *rc = SP_RECT_CONTEXT(ec); SPDesktop *desktop = ec->desktop; sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME); sp_rect_finish(rc); rc->sel_changed_connection.disconnect(); if (((SPEventContextClass *) parent_class)->finish) { ((SPEventContextClass *) parent_class)->finish(ec); } } static void sp_rect_context_dispose(GObject *object) { SPRectContext *rc = SP_RECT_CONTEXT(object); SPEventContext *ec = SP_EVENT_CONTEXT(object); ec->enableGrDrag(false); rc->sel_changed_connection.disconnect(); rc->sel_changed_connection.~connection(); delete ec->shape_editor; ec->shape_editor = NULL; /* fixme: This is necessary because we do not grab */ if (rc->item) { sp_rect_finish(rc); } if (rc->_message_context) { delete rc->_message_context; } G_OBJECT_CLASS(parent_class)->dispose(object); } /** \brief Callback that processes the "changed" signal on the selection; destroys old and creates new knotholder */ void sp_rect_context_selection_changed(Inkscape::Selection *selection, gpointer data) { SPRectContext *rc = SP_RECT_CONTEXT(data); SPEventContext *ec = SP_EVENT_CONTEXT(rc); ec->shape_editor->unset_item(SH_KNOTHOLDER); SPItem *item = selection->singleItem(); ec->shape_editor->set_item(item, SH_KNOTHOLDER); } static void sp_rect_context_setup(SPEventContext *ec) { SPRectContext *rc = SP_RECT_CONTEXT(ec); if (((SPEventContextClass *) parent_class)->setup) { ((SPEventContextClass *) parent_class)->setup(ec); } ec->shape_editor = new ShapeEditor(ec->desktop); SPItem *item = sp_desktop_selection(ec->desktop)->singleItem(); if (item) { ec->shape_editor->set_item(item, SH_KNOTHOLDER); } rc->sel_changed_connection.disconnect(); rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged( sigc::bind(sigc::ptr_fun(&sp_rect_context_selection_changed), (gpointer)rc) ); sp_event_context_read(ec, "rx"); sp_event_context_read(ec, "ry"); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/shapes/selcue")) { ec->enableSelectionCue(); } if (prefs->getBool("/tools/shapes/gradientdrag")) { ec->enableGrDrag(); } rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack()); } static void sp_rect_context_set(SPEventContext *ec, Inkscape::Preferences::Entry *val) { SPRectContext *rc = SP_RECT_CONTEXT(ec); /* fixme: Proper error handling for non-numeric data. Use a locale-independent function like * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */ Glib::ustring name = val->getEntryName(); if ( name == "rx" ) { rc->rx = val->getDoubleLimited(); // prevents NaN and +/-Inf from messing up } else if ( name == "ry" ) { rc->ry = val->getDoubleLimited(); } } static gint sp_rect_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event) { SPDesktop *desktop = event_context->desktop; gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: if ( event->button.button == 1 && !event_context->space_panning) { Inkscape::setup_for_drag_start(desktop, event_context, event); ret = TRUE; } break; // motion and release are always on root (why?) default: break; } if (((SPEventContextClass *) parent_class)->item_handler) { ret = ((SPEventContextClass *) parent_class)->item_handler(event_context, item, event); } return ret; } static gint sp_rect_context_root_handler(SPEventContext *event_context, GdkEvent *event) { static bool dragging; SPDesktop *desktop = event_context->desktop; Inkscape::Selection *selection = sp_desktop_selection (desktop); SPRectContext *rc = SP_RECT_CONTEXT(event_context); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: if (event->button.button == 1 && !event_context->space_panning) { Geom::Point const button_w(event->button.x, event->button.y); // save drag origin event_context->xp = (gint) button_w[Geom::X]; event_context->yp = (gint) button_w[Geom::Y]; event_context->within_tolerance = true; // remember clicked item, disregarding groups, honoring Alt event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE); dragging = true; /* Position center */ Geom::Point button_dt(desktop->w2d(button_w)); rc->center = from_2geom(button_dt); /* Snap center */ SnapManager &m = desktop->namedview->snap_manager; m.setup(desktop); m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, button_dt, Inkscape::SNAPSOURCE_HANDLE); rc->center = from_2geom(button_dt); sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), ( GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK ), NULL, event->button.time); ret = TRUE; } break; case GDK_MOTION_NOTIFY: if ( dragging && (event->motion.state & GDK_BUTTON1_MASK) && !event_context->space_panning) { if ( event_context->within_tolerance && ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance ) && ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) { break; // do not drag if we're within tolerance from origin } // Once the user has moved farther than tolerance from the original location // (indicating they intend to draw, not click), then always process the // motion notify coordinates as given (no snapping back to origin) event_context->within_tolerance = false; Geom::Point const motion_w(event->motion.x, event->motion.y); Geom::Point motion_dt(desktop->w2d(motion_w)); sp_rect_drag(*rc, motion_dt, event->motion.state); // this will also handle the snapping gobble_motion_events(GDK_BUTTON1_MASK); ret = TRUE; } break; case GDK_BUTTON_RELEASE: event_context->xp = event_context->yp = 0; if (event->button.button == 1 && !event_context->space_panning) { dragging = false; sp_event_context_discard_delayed_snap_event(event_context); if (!event_context->within_tolerance) { // we've been dragging, finish the rect sp_rect_finish(rc); } else if (event_context->item_to_select) { // no dragging, select clicked item if any if (event->button.state & GDK_SHIFT_MASK) { selection->toggle(event_context->item_to_select); } else { selection->set(event_context->item_to_select); } } else { // click in an empty space selection->clear(); } event_context->item_to_select = NULL; ret = TRUE; sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time); } break; case GDK_KEY_PRESS: switch (get_group0_keyval (&event->key)) { case GDK_Alt_L: case GDK_Alt_R: case GDK_Control_L: case GDK_Control_R: case GDK_Shift_L: case GDK_Shift_R: case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine) case GDK_Meta_R: if (!dragging){ sp_event_show_modifier_tip (event_context->defaultMessageContext(), event, _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"), _("<b>Shift</b>: draw around the starting point"), NULL); } break; case GDK_Up: case GDK_Down: case GDK_KP_Up: case GDK_KP_Down: // prevent the zoom field from activation if (!MOD__CTRL_ONLY) ret = TRUE; break; case GDK_x: case GDK_X: if (MOD__ALT_ONLY) { desktop->setToolboxFocusTo ("altx-rect"); ret = TRUE; } break; case GDK_g: case GDK_G: if (MOD__SHIFT_ONLY) { sp_selection_to_guides(desktop); ret = true; } break; case GDK_Escape: if (dragging) { dragging = false; sp_event_context_discard_delayed_snap_event(event_context); // if drawing, cancel, otherwise pass it up for deselecting sp_rect_cancel(rc); ret = TRUE; } break; case GDK_space: if (dragging) { sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time); dragging = false; sp_event_context_discard_delayed_snap_event(event_context); if (!event_context->within_tolerance) { // we've been dragging, finish the rect sp_rect_finish(rc); } // do not return true, so that space would work switching to selector } break; default: break; } break; case GDK_KEY_RELEASE: switch (get_group0_keyval (&event->key)) { case GDK_Alt_L: case GDK_Alt_R: case GDK_Control_L: case GDK_Control_R: case GDK_Shift_L: case GDK_Shift_R: case GDK_Meta_L: // Meta is when you press Shift+Alt case GDK_Meta_R: event_context->defaultMessageContext()->clear(); break; default: break; } break; default: break; } if (!ret) { if (((SPEventContextClass *) parent_class)->root_handler) { ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event); } } return ret; } static void sp_rect_drag(SPRectContext &rc, Geom::Point const pt, guint state) { SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop; if (!rc.item) { if (Inkscape::have_viable_layer(desktop, rc._message_context) == false) { return; } /* Create object */ Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&rc)); Inkscape::XML::Node *repr = xml_doc->createElement("svg:rect"); /* Set style */ sp_desktop_apply_style_tool (desktop, repr, "/tools/shapes/rect", false); rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr); Inkscape::GC::release(repr); rc.item->transform = sp_item_i2doc_affine(SP_ITEM(desktop->currentLayer())).inverse(); rc.item->updateRepr(); sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5); } Geom::Rect const r = Inkscape::snap_rectangular_box(desktop, rc.item, pt, rc.center, state); sp_rect_position_set(SP_RECT(rc.item), r.min()[Geom::X], r.min()[Geom::Y], r.dimensions()[Geom::X], r.dimensions()[Geom::Y]); if ( rc.rx != 0.0 ) { sp_rect_set_rx (SP_RECT(rc.item), TRUE, rc.rx); } if ( rc.ry != 0.0 ) { if (rc.rx == 0.0) sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, MIN(r.dimensions()[Geom::X], r.dimensions()[Geom::Y])/2)); else sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, r.dimensions()[Geom::Y])); } // status text double rdimx = r.dimensions()[Geom::X]; double rdimy = r.dimensions()[Geom::Y]; GString *xs = SP_PX_TO_METRIC_STRING(rdimx, desktop->namedview->getDefaultMetric()); GString *ys = SP_PX_TO_METRIC_STRING(rdimy, desktop->namedview->getDefaultMetric()); if (state & GDK_CONTROL_MASK) { int ratio_x, ratio_y; bool is_golden_ratio = false; if (fabs (rdimx) > fabs (rdimy)) { if (fabs(rdimx / rdimy - goldenratio) < 1e-6) { is_golden_ratio = true; } ratio_x = (int) rint (rdimx / rdimy); ratio_y = 1; } else { if (fabs(rdimy / rdimx - goldenratio) < 1e-6) { is_golden_ratio = true; } ratio_x = 1; ratio_y = (int) rint (rdimy / rdimx); } if (!is_golden_ratio) { rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to ratio %d:%d); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str, ratio_x, ratio_y); } else { if (ratio_y == 1) { rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to golden ratio 1.618 : 1); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str); } else { rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s (constrained to golden ratio 1 : 1.618); with <b>Shift</b> to draw around the starting point"), xs->str, ys->str); } } } else { rc._message_context->setF(Inkscape::IMMEDIATE_MESSAGE, _("<b>Rectangle</b>: %s × %s; with <b>Ctrl</b> to make square or integer-ratio rectangle; with <b>Shift</b> to draw around the starting point"), xs->str, ys->str); } g_string_free(xs, FALSE); g_string_free(ys, FALSE); } static void sp_rect_finish(SPRectContext *rc) { rc->_message_context->clear(); if ( rc->item != NULL ) { SPRect *rect = SP_RECT(rc->item); if (rect->width.computed == 0 || rect->height.computed == 0) { sp_rect_cancel(rc); // Don't allow the creating of zero sized rectangle, for example when the start and and point snap to the snap grid point return; } SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(rc); SP_OBJECT(rc->item)->updateRepr(); sp_canvas_end_forced_full_redraws(desktop->canvas); sp_desktop_selection(desktop)->set(rc->item); sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_RECT, _("Create rectangle")); rc->item = NULL; } } static void sp_rect_cancel(SPRectContext *rc) { SPDesktop *desktop = SP_EVENT_CONTEXT(rc)->desktop; sp_desktop_selection(desktop)->clear(); sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), 0); if (rc->item != NULL) { SP_OBJECT(rc->item)->deleteObject(); rc->item = NULL; } rc->within_tolerance = false; rc->xp = 0; rc->yp = 0; rc->item_to_select = NULL; sp_canvas_end_forced_full_redraws(desktop->canvas); sp_document_cancel(sp_desktop_document(desktop)); } /* 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:encoding=utf-8:textwidth=99 :