/**
Handles all keyboard and mouse input for meshs.
*/
static gint
sp_mesh_context_root_handler(SPEventContext *event_context, GdkEvent *event)
{
// static int count = 0;
// std::cout << "sp_mesh_context_root_handler: " << count++ << std::endl;
static bool dragging;
SPDesktop *desktop = event_context->desktop;
Inkscape::Selection *selection = sp_desktop_selection (desktop);
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
SPMeshContext *rc = SP_MESH_CONTEXT(event_context);
event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
double const nudge = prefs->getDoubleLimited("/options/nudgedistance/value", 2, 0, 1000, "px"); // in px
GrDrag *drag = event_context->_grdrag;
g_assert (drag);
gint ret = FALSE;
switch (event->type) {
case GDK_2BUTTON_PRESS:
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_2BUTTON_PRESS" << std::endl;
#endif
// Double click:
// If over a mesh line, divide mesh row/column
// If not over a line, create new gradients for selected objects.
if ( event->button.button == 1 ) {
// Are we over a mesh line?
bool over_line = false;
SPCtrlCurve *line = NULL;
if (drag->lines) {
for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
line = (SPCtrlCurve*) l->data;
over_line |= sp_mesh_context_is_over_line (rc, (SPItem*) line, Geom::Point(event->motion.x, event->motion.y));
}
}
if (over_line) {
// We take the first item in selection, because with doubleclick, the first click
// always resets selection to the single object under cursor
sp_mesh_context_split_near_point(rc, SP_ITEM(selection->itemList()->data), rc->mousepoint_doc, event->button.time);
} else {
// Create a new gradient with default coordinates.
for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
SPItem *item = SP_ITEM(i->data);
SPGradientType new_type = SP_GRADIENT_TYPE_MESH;
Inkscape::PaintTarget fsmode = (prefs->getInt("/tools/gradient/newfillorstroke", 1) != 0) ? Inkscape::FOR_FILL : Inkscape::FOR_STROKE;
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: creating new mesh on: " << (fsmode == Inkscape::FOR_FILL ? "Fill" : "Stroke") << std::endl;
#endif
SPGradient *vector = sp_gradient_vector_for_object(sp_desktop_document(desktop), desktop, item, fsmode);
SPGradient *priv = sp_item_set_gradient(item, vector, new_type, fsmode);
sp_gradient_reset_to_userspace(priv, item);
}
DocumentUndo::done(sp_desktop_document (desktop), SP_VERB_CONTEXT_MESH,
_("Create default mesh"));
}
ret = TRUE;
}
break;
case GDK_BUTTON_PRESS:
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_BUTTON_PRESS" << std::endl;
#endif
// Button down
// If Shift key down: do rubber band selection
// Else set origin for drag. A drag creates a new gradient if one does not exist
if ( event->button.button == 1 && !event_context->space_panning ) {
Geom::Point 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;
dragging = true;
Geom::Point button_dt = desktop->w2d(button_w);
if (event->button.state & GDK_SHIFT_MASK) {
Inkscape::Rubberband::get(desktop)->start(desktop, button_dt);
} else {
// remember clicked item, disregarding groups, honoring Alt; do nothing with Crtl to
// enable Ctrl+doubleclick of exactly the selected item(s)
if (!(event->button.state & GDK_CONTROL_MASK))
event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
if (!selection->isEmpty()) {
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop);
m.freeSnapReturnByRef(button_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);
m.unSetup();
}
rc->origin = button_dt;
}
ret = TRUE;
}
break;
case GDK_MOTION_NOTIFY:
// Mouse move
if ( dragging
&& ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning )
{
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_MOTION_NOTIFY: Dragging" << std::endl;
#endif
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 const motion_dt = event_context->desktop->w2d(motion_w);
if (Inkscape::Rubberband::get(desktop)->is_started()) {
Inkscape::Rubberband::get(desktop)->move(motion_dt);
event_context->defaultMessageContext()->set(Inkscape::NORMAL_MESSAGE, _("<b>Draw around</b> handles to select them"));
} else {
// Create new gradient with coordinates determined by drag.
sp_mesh_drag(*rc, motion_dt, event->motion.state, event->motion.time);
}
gobble_motion_events(GDK_BUTTON1_MASK);
ret = TRUE;
} else {
// Not dragging
// Do snapping
if (!drag->mouseOver() && !selection->isEmpty()) {
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop);
Geom::Point const motion_w(event->motion.x, event->motion.y);
Geom::Point const motion_dt = event_context->desktop->w2d(motion_w);
m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_OTHER_HANDLE));
m.unSetup();
}
// Highlight corner node corresponding to side or tensor node
if( drag->mouseOver() ) {
// MESH FIXME: Light up corresponding corner node corresponding to node we are over.
// See "pathflash" in ui/tools/node-tool.cpp for ideas.
// Use desktop->add_temporary_canvasitem( SPCanvasItem, milliseconds );
}
// Change cursor shape if over line
bool over_line = false;
if (drag->lines) {
for (GSList *l = drag->lines; l != NULL; l = l->next) {
over_line |= sp_mesh_context_is_over_line (rc, (SPItem*) l->data, Geom::Point(event->motion.x, event->motion.y));
}
}
if (rc->cursor_addnode && !over_line) {
event_context->cursor_shape = cursor_gradient_xpm;
sp_event_context_update_cursor(event_context);
rc->cursor_addnode = false;
} else if (!rc->cursor_addnode && over_line) {
event_context->cursor_shape = cursor_gradient_add_xpm;
sp_event_context_update_cursor(event_context);
rc->cursor_addnode = true;
}
}
break;
case GDK_BUTTON_RELEASE:
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_BUTTON_RELEASE" << std::endl;
#endif
event_context->xp = event_context->yp = 0;
if ( event->button.button == 1 && !event_context->space_panning ) {
// Check if over line
bool over_line = false;
SPCtrlLine *line = NULL;
if (drag->lines) {
for (GSList *l = drag->lines; (l != NULL) && (!over_line); l = l->next) {
line = (SPCtrlLine*) l->data;
over_line = sp_mesh_context_is_over_line (rc, (SPItem*) line, Geom::Point(event->motion.x, event->motion.y));
if (over_line)
break;
}
}
if ( (event->button.state & GDK_CONTROL_MASK) && (event->button.state & GDK_MOD1_MASK ) ) {
if (over_line && line) {
sp_mesh_context_split_near_point(rc, line->item, rc->mousepoint_doc, 0);
ret = TRUE;
}
} else {
dragging = false;
// unless clicked with Ctrl (to enable Ctrl+doubleclick).
if (event->button.state & GDK_CONTROL_MASK) {
ret = TRUE;
break;
}
if (!event_context->within_tolerance) {
// we've been dragging, either do nothing (grdrag handles that),
// or rubberband-select if we have rubberband
Inkscape::Rubberband *r = Inkscape::Rubberband::get(desktop);
if (r->is_started() && !event_context->within_tolerance) {
// this was a rubberband drag
if (r->getMode() == RUBBERBAND_MODE_RECT) {
Geom::OptRect const b = r->getRectangle();
drag->selectRect(*b);
}
}
} else if (event_context->item_to_select) {
if (over_line && line) {
// Clicked on an existing mesh line, don't change selection. This stops
// possible change in selection during a double click with overlapping objects
}
else {
// 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; do the same as Esc
if (drag->selected) {
drag->deselectAll();
} else {
selection->clear();
}
}
event_context->item_to_select = NULL;
ret = TRUE;
}
Inkscape::Rubberband::get(desktop)->stop();
}
break;
case GDK_KEY_PRESS:
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_KEY_PRESS" << std::endl;
#endif
// FIXME: tip
switch (get_group0_keyval (&event->key)) {
case GDK_KEY_Alt_L:
case GDK_KEY_Alt_R:
case GDK_KEY_Control_L:
case GDK_KEY_Control_R:
case GDK_KEY_Shift_L:
case GDK_KEY_Shift_R:
case GDK_KEY_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)
case GDK_KEY_Meta_R:
sp_event_show_modifier_tip (event_context->defaultMessageContext(), event,
_("FIXME<b>Ctrl</b>: snap mesh angle"),
_("FIXME<b>Shift</b>: draw mesh around the starting point"),
NULL);
break;
case GDK_KEY_A:
case GDK_KEY_a:
if (MOD__CTRL_ONLY && drag->isNonEmpty()) {
drag->selectAll();
ret = TRUE;
}
break;
case GDK_KEY_Escape:
if (drag->selected) {
drag->deselectAll();
} else {
selection->clear();
}
ret = TRUE;
//TODO: make dragging escapable by Esc
break;
case GDK_KEY_Left: // move handle left
case GDK_KEY_KP_Left:
case GDK_KEY_KP_4:
if (!MOD__CTRL) { // not ctrl
gint mul = 1 + gobble_key_events(
get_group0_keyval(&event->key), 0); // with any mask
if (MOD__ALT) { // alt
if (MOD__SHIFT) drag->selected_move_screen(mul*-10, 0); // shift
else drag->selected_move_screen(mul*-1, 0); // no shift
}
else { // no alt
if (MOD__SHIFT) drag->selected_move(mul*-10*nudge, 0); // shift
else drag->selected_move(mul*-nudge, 0); // no shift
}
ret = TRUE;
}
break;
case GDK_KEY_Up: // move handle up
case GDK_KEY_KP_Up:
case GDK_KEY_KP_8:
if (!MOD__CTRL) { // not ctrl
gint mul = 1 + gobble_key_events(
get_group0_keyval(&event->key), 0); // with any mask
if (MOD__ALT) { // alt
if (MOD__SHIFT) drag->selected_move_screen(0, mul*10); // shift
else drag->selected_move_screen(0, mul*1); // no shift
}
else { // no alt
if (MOD__SHIFT) drag->selected_move(0, mul*10*nudge); // shift
else drag->selected_move(0, mul*nudge); // no shift
}
ret = TRUE;
}
break;
case GDK_KEY_Right: // move handle right
case GDK_KEY_KP_Right:
case GDK_KEY_KP_6:
if (!MOD__CTRL) { // not ctrl
gint mul = 1 + gobble_key_events(
get_group0_keyval(&event->key), 0); // with any mask
if (MOD__ALT) { // alt
if (MOD__SHIFT) drag->selected_move_screen(mul*10, 0); // shift
else drag->selected_move_screen(mul*1, 0); // no shift
}
else { // no alt
if (MOD__SHIFT) drag->selected_move(mul*10*nudge, 0); // shift
else drag->selected_move(mul*nudge, 0); // no shift
}
ret = TRUE;
}
break;
case GDK_KEY_Down: // move handle down
case GDK_KEY_KP_Down:
case GDK_KEY_KP_2:
if (!MOD__CTRL) { // not ctrl
gint mul = 1 + gobble_key_events(
get_group0_keyval(&event->key), 0); // with any mask
if (MOD__ALT) { // alt
if (MOD__SHIFT) drag->selected_move_screen(0, mul*-10); // shift
else drag->selected_move_screen(0, mul*-1); // no shift
}
else { // no alt
if (MOD__SHIFT) drag->selected_move(0, mul*-10*nudge); // shift
else drag->selected_move(0, mul*-nudge); // no shift
}
ret = TRUE;
}
break;
case GDK_KEY_Insert:
case GDK_KEY_KP_Insert:
// with any modifiers:
//sp_gradient_context_add_stops_between_selected_stops (rc);
std::cout << "Inserting stops between selected stops not implemented yet" << std::endl;
ret = TRUE;
break;
case GDK_KEY_Delete:
case GDK_KEY_KP_Delete:
case GDK_KEY_BackSpace:
if ( drag->selected ) {
std::cout << "Deleting mesh stops not implemented yet" << std::endl;
ret = TRUE;
}
break;
// Mesh Operations --------------------------------------------
case GDK_KEY_b: // Toggle mesh side between lineto and curveto.
case GDK_KEY_B:
if (MOD__ALT && drag->isNonEmpty() && drag->hasSelection()) {
sp_mesh_context_corner_operation ( rc, MG_CORNER_SIDE_TOGGLE );
ret = TRUE;
}
break;
case GDK_KEY_c: // Convert mesh side from generic Bezier to Bezier approximating arc,
case GDK_KEY_C: // preserving handle direction.
if (MOD__ALT && drag->isNonEmpty() && drag->hasSelection()) {
sp_mesh_context_corner_operation ( rc, MG_CORNER_SIDE_ARC );
ret = TRUE;
}
break;
case GDK_KEY_g: // Toggle mesh tensor points on/off
case GDK_KEY_G:
if (MOD__ALT && drag->isNonEmpty() && drag->hasSelection()) {
sp_mesh_context_corner_operation ( rc, MG_CORNER_TENSOR_TOGGLE );
ret = TRUE;
}
break;
case GDK_KEY_j: // Smooth corner color
case GDK_KEY_J:
if (MOD__ALT && drag->isNonEmpty() && drag->hasSelection()) {
sp_mesh_context_corner_operation ( rc, MG_CORNER_COLOR_SMOOTH );
ret = TRUE;
}
break;
case GDK_KEY_k: // Pick corner color
case GDK_KEY_K:
if (MOD__ALT && drag->isNonEmpty() && drag->hasSelection()) {
sp_mesh_context_corner_operation ( rc, MG_CORNER_COLOR_PICK );
ret = TRUE;
}
break;
default:
break;
}
break;
case GDK_KEY_RELEASE:
#ifdef DEBUG_MESH
std::cout << "sp_mesh_context_root_handler: GDK_KEY_RELEASE" << std::endl;
#endif
switch (get_group0_keyval (&event->key)) {
case GDK_KEY_Alt_L:
case GDK_KEY_Alt_R:
case GDK_KEY_Control_L:
case GDK_KEY_Control_R:
case GDK_KEY_Shift_L:
case GDK_KEY_Shift_R:
case GDK_KEY_Meta_L: // Meta is when you press Shift+Alt
case GDK_KEY_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;
}
