#define __SP_RECT_CONTEXT_C__ /* * Rectangle drawing context * * Author: * Lauris Kaplinski <lauris@kaplinski.com> * bulia byak <buliabyak@users.sf.net> * * 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 <math.h> #include <string.h> #include <glib.h> #include <gtk/gtk.h> #include <gdk/gdkkeysyms.h> #include "macros.h" #include "display/sp-canvas.h" #include "sp-rect.h" #include "inkscape.h" #include "document.h" #include "sp-namedview.h" #include "selection.h" #include "desktop-handles.h" #include "desktop-affine.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 "widgets/desktop-widget.h" #include "sp-metrics.h" #include <glibmm/i18n.h> #include "object-edit.h" #include "knotholder.h" #include "xml/repr.h" #include "xml/node-event-vector.h" #include "prefs-utils.h" #include "widgets/spw-utilities.h" #include "selcue.h" 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_set(SPEventContext *ec, gchar const *key, gchar const *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, NR::Point const pt, guint state); static void sp_rect_finish(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->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; event_context->shape_repr = NULL; event_context->shape_knot_holder = 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_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(); /* fixme: This is necessary because we do not grab */ if (rc->item) { sp_rect_finish(rc); } if (ec->shape_knot_holder) { sp_knot_holder_destroy(ec->shape_knot_holder); ec->shape_knot_holder = NULL; } if (ec->shape_repr) { // remove old listener sp_repr_remove_listener_by_data(ec->shape_repr, ec); sp_repr_unref(ec->shape_repr); ec->shape_repr = 0; } if (rc->_message_context) { delete rc->_message_context; } G_OBJECT_CLASS(parent_class)->dispose(object); } static Inkscape::XML::NodeEventVector ec_shape_repr_events = { NULL, /* child_added */ NULL, /* child_removed */ ec_shape_event_attr_changed, NULL, /* content_changed */ NULL /* order_changed */ }; /** \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); if (ec->shape_knot_holder) { // destroy knotholder sp_knot_holder_destroy(ec->shape_knot_holder); ec->shape_knot_holder = NULL; } if (ec->shape_repr) { // remove old listener sp_repr_remove_listener_by_data(ec->shape_repr, ec); sp_repr_unref(ec->shape_repr); ec->shape_repr = 0; } SPItem *item = selection->singleItem(); if (item) { ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop); Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item); if (shape_repr) { ec->shape_repr = shape_repr; sp_repr_ref(shape_repr); sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec); sp_repr_synthesize_events(shape_repr, &ec_shape_repr_events, ec); } } } static void sp_rect_context_setup(SPEventContext *ec) { SPRectContext *rc = SP_RECT_CONTEXT(ec); if (((SPEventContextClass *) parent_class)->setup) { ((SPEventContextClass *) parent_class)->setup(ec); } SPItem *item = SP_DT_SELECTION(ec->desktop)->singleItem(); if (item) { ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop); Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item); if (shape_repr) { ec->shape_repr = shape_repr; sp_repr_ref(shape_repr); sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec); sp_repr_synthesize_events(shape_repr, &ec_shape_repr_events, ec); } } rc->sel_changed_connection.disconnect(); rc->sel_changed_connection = SP_DT_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"); if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) { ec->enableSelectionCue(); } if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) { ec->enableGrDrag(); } rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack()); } static void sp_rect_context_set(SPEventContext *ec, gchar const *key, gchar const *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). */ if ( strcmp(key, "rx") == 0 ) { rc->rx = ( val ? g_ascii_strtod (val, NULL) : 0.0 ); } else if ( strcmp(key, "ry") == 0 ) { rc->ry = ( val ? g_ascii_strtod (val, NULL) : 0.0 ); } } 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 ) { // save drag origin event_context->xp = (gint) event->button.x; event_context->yp = (gint) event->button.y; event_context->within_tolerance = true; // remember clicked item, disregarding groups, honoring Alt event_context->item_to_select = sp_event_context_find_item (desktop, NR::Point(event->button.x, event->button.y), event->button.state & GDK_MOD1_MASK, TRUE); 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_DT_SELECTION (desktop); SPRectContext *rc = SP_RECT_CONTEXT(event_context); event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100); gint ret = FALSE; switch (event->type) { case GDK_BUTTON_PRESS: if ( event->button.button == 1 ) { NR::Point const button_w(event->button.x, event->button.y); // save drag origin event_context->xp = (gint) button_w[NR::X]; event_context->yp = (gint) button_w[NR::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 */ NR::Point const button_dt(sp_desktop_w2d_xy_point(event_context->desktop, button_w)); /* Snap center to nearest magnetic point */ rc->center = button_dt; namedview_free_snap_all_types(event_context->desktop->namedview, rc->center); 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 ) ) { 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; NR::Point const motion_w(event->motion.x, event->motion.y); NR::Point const motion_dt(sp_desktop_w2d_xy_point(event_context->desktop, motion_w)); sp_rect_drag(*rc, motion_dt, event->motion.state); ret = TRUE; } break; case GDK_BUTTON_RELEASE: event_context->xp = event_context->yp = 0; if ( event->button.button == 1 ) { dragging = false; 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: 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) { gpointer hb = sp_search_by_data_recursive (desktop->owner->aux_toolbox, (gpointer) "altx-rect"); if (hb && GTK_IS_WIDGET(hb)) { gtk_widget_grab_focus (GTK_WIDGET (hb)); } ret = TRUE; } break; case GDK_Escape: SP_DT_SELECTION(desktop)->clear(); //TODO: make dragging escapable by Esc 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, NR::Point const pt, guint state) { SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop; if (!rc.item) { SPItem *layer=SP_ITEM(desktop->currentLayer()); if ( !layer || desktop->itemIsHidden(layer)) { rc._message_context->set(Inkscape::ERROR_MESSAGE, _("<b>Current layer is hidden</b>. Unhide it to be able to draw on it.")); return; } if ( !layer || layer->isLocked()) { rc._message_context->set(Inkscape::ERROR_MESSAGE, _("<b>Current layer is locked</b>. Unlock it to be able to draw on it.")); return; } /* Create object */ Inkscape::XML::Node *repr = sp_repr_new("svg:rect"); /* Set style */ sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.rect", false); rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr); sp_repr_unref(repr); rc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); rc.item->updateRepr(); } NR::Point p0, p1; if ( state & GDK_CONTROL_MASK ) { NR::Point delta = pt - rc.center; /* fixme: Snapping */ if ( ( fabs(delta[0]) > fabs(delta[1]) ) && ( delta[1] != 0.0) ) { delta[0] = floor( delta[0] / delta[1] + 0.5 ) * delta[1]; } else if ( delta[0] != 0.0 ) { delta[1] = floor( delta[1] / delta[0] + 0.5 ) * delta[0]; } p1 = rc.center + delta; if ( state & GDK_SHIFT_MASK ) { p0 = rc.center - delta; NR::Coord const l0 = namedview_vector_snap_all_types(desktop->namedview, p0, p0 - p1); NR::Coord const l1 = namedview_vector_snap_all_types(desktop->namedview, p1, p1 - p0); if (l0 < l1) { p1 = 2 * rc.center - p0; } else { p0 = 2 * rc.center - p1; } } else { p0 = rc.center; namedview_vector_snap_all_types(desktop->namedview, p1, p1 - p0); } } else if ( state & GDK_SHIFT_MASK ) { /* Corner point movements are bound */ p1 = pt; p0 = 2 * rc.center - p1; for (unsigned d = 0 ; d < 2 ; ++d) { double snap_movement[2]; snap_movement[0] = namedview_dim_snap_all_types(desktop->namedview, p0, NR::Dim2(d)); snap_movement[1] = namedview_dim_snap_all_types(desktop->namedview, p1, NR::Dim2(d)); if ( snap_movement[0] < snap_movement[1] ) { /* Use point 0 position. */ p1[d] = 2 * rc.center[d] - p0[d]; } else { p0[d] = 2 * rc.center[d] - p1[d]; } } } else { /* Free movement for corner point */ p0 = rc.center; p1 = pt; namedview_free_snap_all_types(desktop->namedview, p1); } p0 = sp_desktop_dt2root_xy_point(desktop, p0); p1 = sp_desktop_dt2root_xy_point(desktop, p1); // TODO: use NR::Rect using NR::X; using NR::Y; NR::Coord const x0 = MIN(p0[X], p1[X]); NR::Coord const y0 = MIN(p0[Y], p1[Y]); NR::Coord const x1 = MAX(p0[X], p1[X]); NR::Coord const y1 = MAX(p0[Y], p1[Y]); NR::Coord const w = x1 - x0; NR::Coord const h = y1 - y0; sp_rect_position_set(SP_RECT(rc.item), x0, y0, w, h); 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(w, h)/2)); else sp_rect_set_ry (SP_RECT(rc.item), TRUE, CLAMP(rc.ry, 0, h)); } // status text GString *xs = SP_PX_TO_METRIC_STRING(fabs( x1 - x0 ), desktop->namedview->getDefaultMetric()); GString *ys = SP_PX_TO_METRIC_STRING(fabs( y1 - y0 ), desktop->namedview->getDefaultMetric()); rc._message_context->setF(Inkscape::NORMAL_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 ) { SPDesktop * dt; dt = SP_EVENT_CONTEXT_DESKTOP(rc); SP_OBJECT(rc->item)->updateRepr(); SP_DT_SELECTION(dt)->set(rc->item); sp_document_done(SP_DT_DOCUMENT(dt)); rc->item = NULL; } } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=c++:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :