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-rw-r--r--src/gradient-context.cpp468
1 files changed, 468 insertions, 0 deletions
diff --git a/src/gradient-context.cpp b/src/gradient-context.cpp
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index 000000000..84bed562d
--- /dev/null
+++ b/src/gradient-context.cpp
@@ -0,0 +1,468 @@
+#define __SP_GRADIENT_CONTEXT_C__
+
+/*
+ * Gradient drawing and editing tool
+ *
+ * Authors:
+ * bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2005 Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+
+#include <gdk/gdkkeysyms.h>
+
+#include "macros.h"
+#include "document.h"
+#include "selection.h"
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "message-context.h"
+#include "message-stack.h"
+#include "pixmaps/cursor-gradient.xpm"
+#include "gradient-context.h"
+#include <glibmm/i18n.h>
+#include "prefs-utils.h"
+#include "gradient-drag.h"
+#include "gradient-chemistry.h"
+#include "xml/repr.h"
+#include "sp-item.h"
+
+static void sp_gradient_context_class_init(SPGradientContextClass *klass);
+static void sp_gradient_context_init(SPGradientContext *gr_context);
+static void sp_gradient_context_dispose(GObject *object);
+
+static void sp_gradient_context_setup(SPEventContext *ec);
+
+static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event);
+
+static void sp_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime);
+
+static SPEventContextClass *parent_class;
+
+
+GtkType sp_gradient_context_get_type()
+{
+ static GType type = 0;
+ if (!type) {
+ GTypeInfo info = {
+ sizeof(SPGradientContextClass),
+ NULL, NULL,
+ (GClassInitFunc) sp_gradient_context_class_init,
+ NULL, NULL,
+ sizeof(SPGradientContext),
+ 4,
+ (GInstanceInitFunc) sp_gradient_context_init,
+ NULL, /* value_table */
+ };
+ type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPGradientContext", &info, (GTypeFlags) 0);
+ }
+ return type;
+}
+
+static void sp_gradient_context_class_init(SPGradientContextClass *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_gradient_context_dispose;
+
+ event_context_class->setup = sp_gradient_context_setup;
+ event_context_class->root_handler = sp_gradient_context_root_handler;
+}
+
+static void sp_gradient_context_init(SPGradientContext *gr_context)
+{
+ SPEventContext *event_context = SP_EVENT_CONTEXT(gr_context);
+
+ event_context->cursor_shape = cursor_gradient_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;
+}
+
+static void sp_gradient_context_dispose(GObject *object)
+{
+ SPGradientContext *rc = SP_GRADIENT_CONTEXT(object);
+ SPEventContext *ec = SP_EVENT_CONTEXT(object);
+
+ ec->enableGrDrag(false);
+
+ if (rc->_message_context) {
+ delete rc->_message_context;
+ }
+
+ G_OBJECT_CLASS(parent_class)->dispose(object);
+}
+
+static void sp_gradient_context_setup(SPEventContext *ec)
+{
+ SPGradientContext *rc = SP_GRADIENT_CONTEXT(ec);
+
+ if (((SPEventContextClass *) parent_class)->setup) {
+ ((SPEventContextClass *) parent_class)->setup(ec);
+ }
+
+ if (prefs_get_int_attribute("tools.gradient", "selcue", 1) != 0) {
+ ec->enableSelectionCue();
+ }
+
+ ec->enableGrDrag();
+
+ rc->_message_context = new Inkscape::MessageContext(SP_DT_MSGSTACK(ec->desktop));
+}
+
+static gint sp_gradient_context_root_handler(SPEventContext *event_context, GdkEvent *event)
+{
+ static bool dragging;
+
+ SPDesktop *desktop = event_context->desktop;
+ Inkscape::Selection *selection = SP_DT_SELECTION (desktop);
+
+ SPGradientContext *rc = SP_GRADIENT_CONTEXT(event_context);
+
+ event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);
+ double const nudge = prefs_get_double_attribute_limited("options.nudgedistance", "value", 2, 0, 1000); // in px
+
+ GrDrag *drag = event_context->_grdrag;
+ g_assert (drag);
+
+ gint ret = FALSE;
+ switch (event->type) {
+ case GDK_2BUTTON_PRESS:
+ if ( event->button.button == 1 ) {
+ for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
+ SPItem *item = SP_ITEM(i->data);
+ SPGradientType new_type = (SPGradientType) prefs_get_int_attribute ("tools.gradient", "newgradient", SP_GRADIENT_TYPE_LINEAR);
+ guint new_fill = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
+
+ SPGradient *vector = sp_gradient_vector_for_object(SP_DT_DOCUMENT(desktop), desktop, SP_OBJECT (item), new_fill);
+
+ SPGradient *priv = sp_item_set_gradient(item, vector, new_type, new_fill);
+ sp_gradient_reset_to_userspace(priv, item);
+ }
+
+ sp_document_done (SP_DT_DOCUMENT (desktop));
+
+ ret = TRUE;
+ }
+ break;
+ 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; 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);
+
+ dragging = true;
+ /* Position center */
+ NR::Point const button_dt = desktop->w2d(button_w);
+ /* Snap center to nearest magnetic point */
+
+ rc->origin = button_dt;
+
+ 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_gradient_drag(*rc, motion_dt, event->motion.state, event->motion.time);
+
+ ret = TRUE;
+ }
+ break;
+ case GDK_BUTTON_RELEASE:
+ event_context->xp = event_context->yp = 0;
+ if ( event->button.button == 1 ) {
+ 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, do nothing (grdrag handles that)
+ } 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; do the same as Esc
+ if (drag->selected) {
+ drag->setSelected (NULL);
+ } else {
+ selection->clear();
+ }
+ }
+
+ event_context->item_to_select = NULL;
+ ret = TRUE;
+ }
+ 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>: snap gradient angle"),
+ _("<b>Shift</b>: draw gradient around the starting point"),
+ NULL);
+ break;
+
+ case GDK_x:
+ case GDK_X:
+ if (MOD__ALT_ONLY) {
+ desktop->setToolboxFocusTo ("altx-grad");
+ ret = TRUE;
+ }
+ break;
+
+ case GDK_Escape:
+ if (drag->selected) {
+ drag->setSelected (NULL);
+ } else {
+ selection->clear();
+ }
+ ret = TRUE;
+ //TODO: make dragging escapable by Esc
+ break;
+
+ case GDK_Tab: // Tab - cycle selection forward
+ if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
+ drag->select_next();
+ ret = TRUE;
+ }
+ break;
+ case GDK_ISO_Left_Tab: // Shift Tab - cycle selection backward
+ if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
+ drag->select_prev();
+ ret = TRUE;
+ }
+ break;
+
+ case GDK_Left: // move handle left
+ case GDK_KP_Left:
+ case GDK_KP_4:
+ if (!MOD__CTRL) { // not ctrl
+ if (MOD__ALT) { // alt
+ if (MOD__SHIFT) drag->selected_move_screen(-10, 0); // shift
+ else drag->selected_move_screen(-1, 0); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT) drag->selected_move(-10*nudge, 0); // shift
+ else drag->selected_move(-nudge, 0); // no shift
+ }
+ ret = TRUE;
+ }
+ break;
+ case GDK_Up: // move handle up
+ case GDK_KP_Up:
+ case GDK_KP_8:
+ if (!MOD__CTRL) { // not ctrl
+ if (MOD__ALT) { // alt
+ if (MOD__SHIFT) drag->selected_move_screen(0, 10); // shift
+ else drag->selected_move_screen(0, 1); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT) drag->selected_move(0, 10*nudge); // shift
+ else drag->selected_move(0, nudge); // no shift
+ }
+ ret = TRUE;
+ }
+ break;
+ case GDK_Right: // move handle right
+ case GDK_KP_Right:
+ case GDK_KP_6:
+ if (!MOD__CTRL) { // not ctrl
+ if (MOD__ALT) { // alt
+ if (MOD__SHIFT) drag->selected_move_screen(10, 0); // shift
+ else drag->selected_move_screen(1, 0); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT) drag->selected_move(10*nudge, 0); // shift
+ else drag->selected_move(nudge, 0); // no shift
+ }
+ ret = TRUE;
+ }
+ break;
+ case GDK_Down: // move handle down
+ case GDK_KP_Down:
+ case GDK_KP_2:
+ if (!MOD__CTRL) { // not ctrl
+ if (MOD__ALT) { // alt
+ if (MOD__SHIFT) drag->selected_move_screen(0, -10); // shift
+ else drag->selected_move_screen(0, -1); // no shift
+ }
+ else { // no alt
+ if (MOD__SHIFT) drag->selected_move(0, -10*nudge); // shift
+ else drag->selected_move(0, -nudge); // no shift
+ }
+ ret = TRUE;
+ }
+ break;
+ case GDK_r:
+ case GDK_R:
+ if (MOD__SHIFT_ONLY) {
+ // First try selected dragger
+ if (drag && drag->selected) {
+ drag->selected_reverse_vector();
+ } else { // If no drag or no dragger selected, act on selection (both fill and stroke gradients)
+ for (GSList const* i = selection->itemList(); i != NULL; i = i->next) {
+ sp_item_gradient_reverse_vector (SP_ITEM(i->data), true);
+ sp_item_gradient_reverse_vector (SP_ITEM(i->data), false);
+ }
+ }
+ // we did an undoable action
+ sp_document_done (SP_DT_DOCUMENT (desktop));
+ ret = TRUE;
+ }
+ 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_gradient_drag(SPGradientContext &rc, NR::Point const pt, guint state, guint32 etime)
+{
+ SPDesktop *desktop = SP_EVENT_CONTEXT(&rc)->desktop;
+ Inkscape::Selection *selection = SP_DT_SELECTION(desktop);
+ SPDocument *document = SP_DT_DOCUMENT(desktop);
+ SPEventContext *ec = SP_EVENT_CONTEXT(&rc);
+
+ if (!selection->isEmpty()) {
+ int type = prefs_get_int_attribute ("tools.gradient", "newgradient", 1);
+ int fill_or_stroke = prefs_get_int_attribute ("tools.gradient", "newfillorstroke", 1);
+
+ SPGradient *vector;
+ if (ec->item_to_select) {
+ vector = sp_gradient_vector_for_object(document, desktop, ec->item_to_select, fill_or_stroke);
+ } else {
+ vector = sp_gradient_vector_for_object(document, desktop, SP_ITEM(selection->itemList()->data), fill_or_stroke);
+ }
+
+ // HACK: reset fill-opacity - that 0.75 is annoying; BUT remove this when we have an opacity slider for all tabs
+ SPCSSAttr *css = sp_repr_css_attr_new();
+ sp_repr_css_set_property(css, "fill-opacity", "1.0");
+
+ for (GSList const *i = selection->itemList(); i != NULL; i = i->next) {
+
+ //FIXME: see above
+ sp_repr_css_change_recursive(SP_OBJECT_REPR(i->data), css, "style");
+
+ sp_item_set_gradient(SP_ITEM(i->data), vector, (SPGradientType) type, fill_or_stroke);
+
+ if (type == SP_GRADIENT_TYPE_LINEAR) {
+ sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P1, rc.origin, fill_or_stroke, true, false);
+ sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_LG_P2, pt, fill_or_stroke, true, false);
+ } else if (type == SP_GRADIENT_TYPE_RADIAL) {
+ sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_CENTER, rc.origin, fill_or_stroke, true, false);
+ sp_item_gradient_set_coords (SP_ITEM(i->data), POINT_RG_R1, pt, fill_or_stroke, true, false);
+ }
+ SP_OBJECT (i->data)->requestModified(SP_OBJECT_MODIFIED_FLAG);
+ }
+ if (ec->_grdrag) {
+ ec->_grdrag->updateDraggers();
+ // prevent regenerating draggers by selection modified signal, which sometimes
+ // comes too late and thus destroys the knot which we will now grab:
+ ec->_grdrag->local_change = true;
+ // give the grab out-of-bounds values of xp/yp because we're already dragging
+ // and therefore are already out of tolerance
+ ec->_grdrag->grabKnot (SP_ITEM(selection->itemList()->data),
+ type == SP_GRADIENT_TYPE_LINEAR? POINT_LG_P2 : POINT_RG_R1,
+ fill_or_stroke, 99999, 99999, etime);
+ }
+ // We did an undoable action, but sp_document_done will be called by the knot when released
+
+ // status text; we do not track coords because this branch is run once, not all the time
+ // during drag
+ rc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>Gradient</b> for %d objects; with <b>Ctrl</b> to snap angle"), g_slist_length((GSList *) selection->itemList()));
+ } else {
+ SP_DT_MSGSTACK(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>objects</b> on which to create gradient."));
+ }
+}
+
+
+/*
+ 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 :
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