diff options
Diffstat (limited to 'src/star-context.cpp')
| -rw-r--r-- | src/star-context.cpp | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/src/star-context.cpp b/src/star-context.cpp new file mode 100644 index 000000000..bee392863 --- /dev/null +++ b/src/star-context.cpp @@ -0,0 +1,484 @@ +#define __SP_STAR_CONTEXT_C__ + +/* + * Star drawing context + * + * Authors: + * Mitsuru Oka <oka326@parkcity.ne.jp> + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * + * Copyright (C) 1999-2002 Lauris Kaplinski + * Copyright (C) 2001-2002 Mitsuru Oka + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#include "config.h" + +#include <gdk/gdkkeysyms.h> + +#include "macros.h" +#include "display/sp-canvas.h" +#include "sp-star.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-star.xpm" +#include "sp-metrics.h" +#include <glibmm/i18n.h> +#include "prefs-utils.h" +#include "xml/repr.h" +#include "xml/node-event-vector.h" +#include "object-edit.h" +#include "context-fns.h" + +#include "star-context.h" + +static void sp_star_context_class_init (SPStarContextClass * klass); +static void sp_star_context_init (SPStarContext * star_context); +static void sp_star_context_dispose (GObject *object); + +static void sp_star_context_setup (SPEventContext *ec); +static void sp_star_context_set (SPEventContext *ec, const gchar *key, const gchar *val); +static gint sp_star_context_root_handler (SPEventContext *ec, GdkEvent *event); + +static void sp_star_drag (SPStarContext * sc, NR::Point p, guint state); +static void sp_star_finish (SPStarContext * sc); + +static SPEventContextClass * parent_class; + +GtkType +sp_star_context_get_type (void) +{ + static GType type = 0; + if (!type) { + GTypeInfo info = { + sizeof (SPStarContextClass), + NULL, NULL, + (GClassInitFunc) sp_star_context_class_init, + NULL, NULL, + sizeof (SPStarContext), + 4, + (GInstanceInitFunc) sp_star_context_init, + NULL, /* value_table */ + }; + type = g_type_register_static (SP_TYPE_EVENT_CONTEXT, "SPStarContext", &info, (GTypeFlags)0); + } + return type; +} + +static void +sp_star_context_class_init (SPStarContextClass * 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_star_context_dispose; + + event_context_class->setup = sp_star_context_setup; + event_context_class->set = sp_star_context_set; + event_context_class->root_handler = sp_star_context_root_handler; +} + +static void +sp_star_context_init (SPStarContext * star_context) +{ + SPEventContext *event_context = SP_EVENT_CONTEXT (star_context); + + event_context->cursor_shape = cursor_star_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; + + star_context->item = NULL; + + star_context->magnitude = 5; + star_context->proportion = 0.5; + star_context->isflatsided = false; + + new (&star_context->sel_changed_connection) sigc::connection(); +} + +static void +sp_star_context_dispose (GObject *object) +{ + SPEventContext *ec = SP_EVENT_CONTEXT (object); + SPStarContext *sc = SP_STAR_CONTEXT (object); + + ec->enableGrDrag(false); + + sc->sel_changed_connection.disconnect(); + sc->sel_changed_connection.~connection(); + + 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); + Inkscape::GC::release(ec->shape_repr); + ec->shape_repr = 0; + } + + /* fixme: This is necessary because we do not grab */ + if (sc->item) sp_star_finish (sc); + + if (sc->_message_context) { + delete sc->_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 +\param selection Should not be NULL. +*/ +void +sp_star_context_selection_changed (Inkscape::Selection * selection, gpointer data) +{ + g_assert (selection != NULL); + + SPStarContext *sc = SP_STAR_CONTEXT (data); + SPEventContext *ec = SP_EVENT_CONTEXT (sc); + + if (ec->shape_knot_holder) { // desktroy 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); + Inkscape::GC::release(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; + Inkscape::GC::anchor(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_star_context_setup (SPEventContext *ec) +{ + SPStarContext *sc = SP_STAR_CONTEXT (ec); + + if (((SPEventContextClass *) parent_class)->setup) + ((SPEventContextClass *) parent_class)->setup (ec); + + sp_event_context_read (ec, "magnitude"); + sp_event_context_read (ec, "proportion"); + sp_event_context_read (ec, "isflatsided"); + sp_event_context_read (ec, "rounded"); + sp_event_context_read (ec, "randomized"); + + Inkscape::Selection *selection = SP_DT_SELECTION(ec->desktop); + + 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; + Inkscape::GC::anchor(shape_repr); + sp_repr_add_listener (shape_repr, &ec_shape_repr_events, ec); + sp_repr_synthesize_events (shape_repr, &ec_shape_repr_events, ec); + } + } + + sc->sel_changed_connection.disconnect(); + sc->sel_changed_connection = selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_star_context_selection_changed), (gpointer)sc)); + + if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) { + ec->enableSelectionCue(); + } + + if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) { + ec->enableGrDrag(); + } + + sc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack()); +} + +static void +sp_star_context_set (SPEventContext *ec, const gchar *key, const gchar *val) +{ + SPStarContext *sc = SP_STAR_CONTEXT (ec); + if (!strcmp (key, "magnitude")) { + sc->magnitude = (val) ? atoi (val) : 5; + sc->magnitude = CLAMP (sc->magnitude, 3, 1024); + } else if (!strcmp (key, "proportion")) { + sc->proportion = (val) ? g_ascii_strtod (val, NULL) : 0.5; + sc->proportion = CLAMP (sc->proportion, 0.01, 2.0); + } else if (!strcmp (key, "isflatsided")) { + if (val && !strcmp(val, "true")) + sc->isflatsided = true; + else + sc->isflatsided = false; + } else if (!strcmp (key, "rounded")) { + sc->rounded = (val) ? g_ascii_strtod (val, NULL) : 0.0; + } else if (!strcmp (key, "randomized")) { + sc->randomized = (val) ? g_ascii_strtod (val, NULL) : 0.0; + } +} + +static gint sp_star_context_root_handler(SPEventContext *event_context, GdkEvent *event) +{ + static gboolean dragging; + + SPDesktop *desktop = event_context->desktop; + Inkscape::Selection *selection = SP_DT_SELECTION (desktop); + + SPStarContext *sc = SP_STAR_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) { + + dragging = TRUE; + + sc->center = Inkscape::setup_for_drag_start(desktop, event_context, event); + + SnapManager const m(desktop->namedview); + sc->center = m.freeSnap(Inkscape::Snapper::SNAP_POINT, sc->center, sc->item).getPoint(); + + sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), + GDK_KEY_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | + GDK_POINTER_MOTION_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(event_context->desktop->w2d(motion_w)); + sp_star_drag (sc, 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 star + sp_star_finish (sc); + } 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_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>: snap angle; keep rays radial"), + NULL, + 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-star"); + 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_star_drag(SPStarContext *sc, NR::Point p, guint state) +{ + SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; + + int const snaps = prefs_get_int_attribute ("options.rotationsnapsperpi", "value", 12); + + if (!sc->item) { + + if (Inkscape::have_viable_layer(desktop, sc->_message_context) == false) { + return; + } + + /* Create object */ + Inkscape::XML::Node *repr = sp_repr_new("svg:path"); + repr->setAttribute("sodipodi:type", "star"); + + /* Set style */ + sp_desktop_apply_style_tool(desktop, repr, "tools.shapes.star", false); + + sc->item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr)); + Inkscape::GC::release(repr); + sc->item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); + sc->item->updateRepr(); + } + + NR::Point const p0 = sp_desktop_dt2root_xy_point(desktop, sc->center); + NR::Point p1 = sp_desktop_dt2root_xy_point(desktop, p); + + /* Snap corner point with no constraints */ + SnapManager const m(desktop->namedview);; + p1 = m.freeSnap(Inkscape::Snapper::SNAP_POINT, p1, sc->item).getPoint(); + + SPStar *star = SP_STAR(sc->item); + + double const sides = (gdouble) sc->magnitude; + NR::Point const d = p1 - p0; + NR::Coord const r1 = NR::L2(d); + double arg1 = atan2(d); + + if (state & GDK_CONTROL_MASK) { + /* Snap angle */ + arg1 = sp_round(arg1, M_PI / snaps); + } + + sp_star_position_set(star, sc->magnitude, p0, r1, r1 * sc->proportion, + arg1, arg1 + M_PI / sides, sc->isflatsided, sc->rounded, sc->randomized); + + /* status text */ + GString *rads = SP_PX_TO_METRIC_STRING(r1, desktop->namedview->getDefaultMetric()); + sc->_message_context->setF(Inkscape::NORMAL_MESSAGE, + ( sc->isflatsided? + _("<b>Polygon</b>: radius %s, angle %5g°; with <b>Ctrl</b> to snap angle") + : _("<b>Star</b>: radius %s, angle %5g°; with <b>Ctrl</b> to snap angle") ), + rads->str, sp_round((arg1) * 180 / M_PI, 0.0001)); + + g_string_free(rads, FALSE); +} + +static void +sp_star_finish (SPStarContext * sc) +{ + sc->_message_context->clear(); + + if (sc->item != NULL) { + SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop; + SPObject *object = SP_OBJECT(sc->item); + + sp_shape_set_shape(SP_SHAPE(sc->item)); + + object->updateRepr(NULL, SP_OBJECT_WRITE_EXT); + + SP_DT_SELECTION(desktop)->set(sc->item); + sp_document_done(SP_DT_DOCUMENT(desktop)); + + sc->item = NULL; + } +} + +/* + 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 : |