diff options
Diffstat (limited to 'src/box3d-context.cpp')
| -rw-r--r-- | src/box3d-context.cpp | 608 |
1 files changed, 608 insertions, 0 deletions
diff --git a/src/box3d-context.cpp b/src/box3d-context.cpp new file mode 100644 index 000000000..ead6486e5 --- /dev/null +++ b/src/box3d-context.cpp @@ -0,0 +1,608 @@ +#define __SP_3DBOX_CONTEXT_C__ + +/* + * 3D box drawing context + * + * Author: + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * + * Copyright (C) 2007 Maximilian Albert <Anhalter42@gmx.de> + * 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 "macros.h" +#include "display/sp-canvas.h" +#include "document.h" +#include "sp-namedview.h" +#include "selection.h" +#include "desktop-handles.h" +#include "snap.h" +#include "display/curve.h" +#include "desktop.h" +#include "message-context.h" +#include "pixmaps/cursor-rect.xpm" +#include "box3d.h" +#include "box3d-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 "prefs-utils.h" +#include "context-fns.h" + +static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass); +static void sp_3dbox_context_init(SP3DBoxContext *box3d_context); +static void sp_3dbox_context_dispose(GObject *object); + +static void sp_3dbox_context_setup(SPEventContext *ec); +static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val); + +static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event); +static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event); + +static void sp_3dbox_drag(SP3DBoxContext &rc, guint state); +static void sp_3dbox_finish(SP3DBoxContext *rc); + +static SPEventContextClass *parent_class; + + +GtkType sp_3dbox_context_get_type() +{ + static GType type = 0; + if (!type) { + GTypeInfo info = { + sizeof(SP3DBoxContextClass), + NULL, NULL, + (GClassInitFunc) sp_3dbox_context_class_init, + NULL, NULL, + sizeof(SP3DBoxContext), + 4, + (GInstanceInitFunc) sp_3dbox_context_init, + NULL, /* value_table */ + }; + type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SP3DBoxContext", &info, (GTypeFlags) 0); + } + return type; +} + +static void sp_3dbox_context_class_init(SP3DBoxContextClass *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_3dbox_context_dispose; + + event_context_class->setup = sp_3dbox_context_setup; + event_context_class->set = sp_3dbox_context_set; + event_context_class->root_handler = sp_3dbox_context_root_handler; + event_context_class->item_handler = sp_3dbox_context_item_handler; +} + +Box3D::Perspective3D * SP3DBoxContext::current_perspective = NULL; + +static void sp_3dbox_context_init(SP3DBoxContext *box3d_context) +{ + SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_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; + + box3d_context->item = NULL; + + box3d_context->rx = 0.0; + box3d_context->ry = 0.0; + + box3d_context->ctrl_dragged = false; + box3d_context->extruded = false; + + /* create an initial perspective */ + if (!SP3DBoxContext::current_perspective) { + SP3DBoxContext::current_perspective = new Box3D::Perspective3D ( + // VP in x-direction + Box3D::VanishingPoint( NR::Point( 50.0, 600.0), + NR::Point( -1.0, 0.0), Box3D::VP_INFINITE), + // VP in y-direction + Box3D::VanishingPoint( NR::Point(700.0, 500.0), + NR::Point(sqrt(3.0),1.0), Box3D::VP_INFINITE), + // VP in z-direction + Box3D::VanishingPoint( NR::Point(500.0,1000.0), + NR::Point( 0.0, 1.0), Box3D::VP_INFINITE)); + } + + new (&box3d_context->sel_changed_connection) sigc::connection(); +} + +static void sp_3dbox_context_dispose(GObject *object) +{ + SP3DBoxContext *rc = SP_3DBOX_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_3dbox_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); + Inkscape::GC::release(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_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data) +{ + SP3DBoxContext *rc = SP_3DBOX_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); + 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); + } + } +} + +static void sp_3dbox_context_setup(SPEventContext *ec) +{ + SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec); + + if (((SPEventContextClass *) parent_class)->setup) { + ((SPEventContextClass *) parent_class)->setup(ec); + } + + SPItem *item = sp_desktop_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; + Inkscape::GC::anchor(shape_repr); + sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec); + } + } + + rc->sel_changed_connection.disconnect(); + rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged( + sigc::bind(sigc::ptr_fun(&sp_3dbox_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_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val) +{ + SP3DBoxContext *rc = SP_3DBOX_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_3dbox_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 ) { + 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_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event) +{ + static bool dragging; + + SPDesktop *desktop = event_context->desktop; + Inkscape::Selection *selection = sp_desktop_selection (desktop); + + SP3DBoxContext *rc = SP_3DBOX_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(desktop->w2d(button_w)); + rc->drag_origin = button_dt; + rc->drag_ptB = button_dt; + rc->drag_ptC = button_dt; + + /* Snap center */ + SnapManager const &m = desktop->namedview->snap_manager; + rc->center = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT, + button_dt, rc->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 motion_dt(desktop->w2d(motion_w)); + + SnapManager const &m = desktop->namedview->snap_manager; + motion_dt = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, motion_dt, rc->item).getPoint(); + + rc->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK; + + if (event->motion.state & GDK_SHIFT_MASK) + rc->extruded = true; // set rc->extruded once shift is pressed + + if (!rc->extruded) { + rc->drag_ptB = motion_dt; + } else { + // Without Ctrl, motion of the extruded corner is constrained to the + // perspective line from drag_ptB to vanishing point Y. + if (!rc->ctrl_dragged) { + rc->drag_ptC = Box3D::perspective_line_snap (rc->drag_ptB, Box3D::Y, motion_dt); + } else { + rc->drag_ptC = motion_dt; + } + rc->drag_ptC = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, rc->drag_ptC, rc->item).getPoint(); + if (rc->ctrl_dragged) { + Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Z); + Box3D::PerspectiveLine pl2 (rc->drag_ptB, Box3D::X); + NR::Point corner1 = pl1.meet(pl2); + + Box3D::PerspectiveLine pl3 (corner1, Box3D::X); + Box3D::PerspectiveLine pl4 (rc->drag_ptC, Box3D::Y); + rc->drag_ptB = pl3.meet(pl4); + } + } + + + sp_3dbox_drag(*rc, event->motion.state); + + ret = TRUE; + } + 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_3dbox_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_Escape: + sp_desktop_selection(desktop)->clear(); + //TODO: make dragging escapable by Esc + break; + + case GDK_space: + if (dragging) { + sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), + event->button.time); + dragging = false; + if (!event_context->within_tolerance) { + // we've been dragging, finish the rect + sp_3dbox_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_3dbox_drag(SP3DBoxContext &rc, 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:g"); + repr->setAttribute("sodipodi:type", "inkscape:3dbox"); + + /* Set style */ + //sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false); + + rc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr); + Inkscape::GC::release(repr); + rc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer()); + + /* The separate faces (created from rear to front) */ + SP3DBox *box3d = SP_3DBOX(rc.item); + box3d->face3.hook_path_to_3dbox(); + box3d->face4.hook_path_to_3dbox(); + box3d->face5.hook_path_to_3dbox(); + box3d->face6.hook_path_to_3dbox(); + box3d->face1.hook_path_to_3dbox(); + box3d->face2.hook_path_to_3dbox(); + + rc.item->updateRepr(); + + sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5); + } + + // FIXME: remove these extra points + NR::Point pt = rc.drag_ptB; + NR::Point shift_pt = rc.drag_ptC; + + NR::Rect r; + if (!(state & GDK_SHIFT_MASK)) { + r = Inkscape::snap_rectangular_box(desktop, rc.item, pt, rc.center, state); + } else { + r = Inkscape::snap_rectangular_box(desktop, rc.item, shift_pt, rc.center, state); + } + + /*** artefacts of rect *** + if ( rc.rx != 0.0 ) { + sp_3dbox_set_rx (SP_3DBOX(rc.item), TRUE, rc.rx); + } + if ( rc.ry != 0.0 ) { + if (rc.rx == 0.0) + sp_3dbox_set_ry (SP_3DBOX(rc.item), TRUE, CLAMP(rc.ry, 0, MIN(r.dimensions()[NR::X], r.dimensions()[NR::Y])/2)); + else + sp_3dbox_set_ry (SP_3DBOX(rc.item), TRUE, CLAMP(rc.ry, 0, r.dimensions()[NR::Y])); + } + ***/ + + SPEventContext *ec = SP_EVENT_CONTEXT(&rc); + NR::Point origin_w(ec->xp, ec->yp); + NR::Point origin(desktop->w2d(origin_w)); + sp_3dbox_position_set(rc); + + // status text + GString *xs = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::X], desktop->namedview->getDefaultMetric()); + GString *ys = SP_PX_TO_METRIC_STRING(r.dimensions()[NR::Y], 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_3dbox_finish(SP3DBoxContext *rc) +{ + rc->_message_context->clear(); + + if ( rc->item != NULL ) { + SPDesktop * desktop; + + 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_3DBOX, + _("Create 3d box")); + + rc->item = NULL; + } + + rc->ctrl_dragged = false; + rc->extruded = false; +} + +/* + 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 : |