desktop-events.cpp

#define __SP_DESKTOP_EVENTS_C__

/*
 * Event handlers for SPDesktop
 *
 * Author:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 1999-2002 Lauris Kaplinski
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gtk/gtksignal.h>
#include <gtk/gtkdialog.h>
#include <gtk/gtkspinbutton.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkvbox.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkimage.h>
#include <gtk/gtkstock.h>
#include "display/guideline.h"
#include "helper/unit-menu.h"
#include "helper/units.h"
#include "libnr/nr-point-matrix-ops.h"
#include "widgets/icon.h"
#include "inkscape-private.h"
#include "desktop.h"
#include "document.h"
#include "sp-guide.h"
#include "sp-namedview.h"
#include "desktop-affine.h"
#include "desktop-handles.h"
#include "event-context.h"
#include "widgets/desktop-widget.h"
#include "sp-metrics.h"
#include "sp-item.h"
#include "desktop-events.h"
#include <glibmm/i18n.h>
#include "dialogs/dialog-events.h"
#include "message-context.h"
#include "xml/repr.h"

static void sp_dt_simple_guide_dialog(SPGuide *guide, SPDesktop *desktop);


/* Root item handler */


int sp_desktop_root_handler(SPCanvasItem *item, GdkEvent *event, SPDesktop *desktop)
{
    return sp_event_context_root_handler(desktop->event_context, event);
}

/*
 * fixme: this conatins a hack, to deal with deleting a view, which is
 * completely on another view, in which case active_desktop will not be updated
 *
 */

int sp_desktop_item_handler(SPCanvasItem *item, GdkEvent *event, gpointer data)
{
    gpointer ddata = gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop");
    g_return_val_if_fail(ddata != NULL, FALSE);

    SPDesktop *desktop = static_cast<SPDesktop*>(ddata);

    return sp_event_context_item_handler(desktop->event_context, SP_ITEM(data), event);
}


static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
{
    static bool dragging = false;
    static SPCanvasItem *guide = NULL;
    int wx, wy;

    SPDesktop *desktop = dtw->desktop;
    Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);

    gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
    NR::Point const event_win(wx, wy);

    switch (event->type) {
      case GDK_BUTTON_PRESS:
            if (event->button.button == 1) {
                dragging = true;
                NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
                NR::Point const event_dt(sp_desktop_w2d_xy_point(desktop, event_w));

                // explicitly show guidelines; if I draw a guide, I want them on
                sp_repr_set_boolean(repr, "showguides", TRUE);
                sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);

                double const guide_pos_dt = event_dt[ horiz
                                                      ? NR::Y
                                                      : NR::X ];
                guide = sp_guideline_new(desktop->guides, guide_pos_dt, !horiz);
                sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
                gdk_pointer_grab(widget->window, FALSE,
                                 (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK),
                                 NULL, NULL,
                                 event->button.time);
            }
            break;
      case GDK_MOTION_NOTIFY:
            if (dragging) {
                NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
                NR::Point const event_dt(sp_desktop_w2d_xy_point(desktop, event_w));
                double const guide_pos_dt = event_dt[ horiz
                                                      ? NR::Y
                                                      : NR::X ];
                sp_guideline_set_position(SP_GUIDELINE(guide), guide_pos_dt);
                desktop->set_coordinate_status(event_dt, ( horiz
                                                                      ? SP_COORDINATES_UNDERLINE_Y
                                                                      : SP_COORDINATES_UNDERLINE_X ));
                desktop->setPosition (event_dt);
            }
            break;
      case GDK_BUTTON_RELEASE:
            if (dragging && event->button.button == 1) {
                gdk_pointer_ungrab(event->button.time);
                NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
                NR::Point const event_dt(sp_desktop_w2d_xy_point(desktop, event_w));
                dragging = false;
                gtk_object_destroy(GTK_OBJECT(guide));
                guide = NULL;
                if ( ( horiz
                       ? wy
                       : wx )
                     >= 0 )
                {
                    Inkscape::XML::Node *repr = sp_repr_new("sodipodi:guide");
                    sp_repr_set_attr(repr, "orientation", (horiz) ? "horizontal" : "vertical");
                    double const guide_pos_dt = event_dt[ horiz
                                                          ? NR::Y
                                                          : NR::X ];
                    sp_repr_set_svg_double(repr, "position", guide_pos_dt);
                    SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
                    sp_repr_unref(repr);
                    sp_document_done(SP_DT_DOCUMENT(desktop));
                }
                desktop->set_coordinate_status(event_dt, 0);
            }
      default:
            break;
    }
    
    return FALSE;
}

int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
{
    return sp_dt_ruler_event(widget, event, dtw, true);
}

int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
{
    return sp_dt_ruler_event(widget, event, dtw, false);
}

/* Guides */

gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
{
    static bool dragging = false;
    static bool moved = false;
    gint ret = FALSE;
    
    SPGuide *guide = SP_GUIDE(data);
    SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));

    switch (event->type) {
      case GDK_2BUTTON_PRESS:
            if (event->button.button == 1) {
                dragging = false;
                sp_canvas_item_ungrab(item, event->button.time);
                sp_dt_simple_guide_dialog(guide, desktop);
                ret = TRUE;
            }
            break;
      case GDK_BUTTON_PRESS:
            if (event->button.button == 1) {
                dragging = true;
                sp_canvas_item_grab(item,
                                    ( GDK_BUTTON_RELEASE_MASK  |
                                      GDK_BUTTON_PRESS_MASK    |
                                      GDK_POINTER_MOTION_MASK  |
                                      GDK_POINTER_MOTION_HINT_MASK ),
                                    NULL,
                                    event->button.time);
                ret = TRUE;
            }
            break;
      case GDK_MOTION_NOTIFY:
            if (dragging) {
                NR::Point const motion_w(event->motion.x,
                                         event->motion.y);
                NR::Point const motion_dt( motion_w * desktop->w2d );
                sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, motion_dt), false);
                moved = true;
                desktop->set_coordinate_status(motion_dt, 0);
                desktop->setPosition (motion_dt);
                ret = TRUE;
            }
            break;
      case GDK_BUTTON_RELEASE:
            if (dragging && event->button.button == 1) {
                if (moved) {
                    NR::Point const event_w(event->button.x,
                                            event->button.y);
                    NR::Point const event_dt(event_w * desktop->w2d);
                    if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
                        sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, event_dt), true);
                    } else {
                        /* Undo movement of any attached shapes. */
                        sp_guide_moveto(*guide, guide->position, false);
                        sp_guide_remove(guide);
                    }
                    moved = false;
                    sp_document_done(SP_DT_DOCUMENT(desktop));
                    desktop->set_coordinate_status(event_dt, 0);
                    desktop->setPosition (event_dt);
                }
                dragging = false;
                sp_canvas_item_ungrab(item, event->button.time);
                ret=TRUE;
            }
      case GDK_ENTER_NOTIFY:
      {
            
            sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);

            GString *position_string = SP_PX_TO_METRIC_STRING(guide->position, desktop->namedview->getDefaultMetric());
            char *guide_description = sp_guide_description(guide);

            desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("%s at %s"), guide_description, position_string->str);

            g_free(guide_description);
            g_string_free(position_string, TRUE);
            break;
      }
      case GDK_LEAVE_NOTIFY:
            sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
            desktop->guidesMessageContext()->clear();
            break;
      default:
            break;
    }
    
    return ret;
}



/*
 * simple guideline dialog
 */

static GtkWidget *d = NULL;
static GtkWidget *l1;
static GtkWidget *l2;
static GtkWidget *e;
static GtkWidget *u;
static GtkWidget *m;
static gdouble oldpos;
static bool mode;
static gpointer g;


static void guide_dialog_mode_changed(GtkWidget *widget)
{
    if (mode) {
        // TRANSLATORS: This string appears when double-clicking on a guide.
        // This is the distance by which the guide is to be moved.
        gtk_label_set_text(GTK_LABEL(m), _(" relative by "));
        mode = false;
    } else {
        // TRANSLATORS: This string appears when double-clicking on a guide.
        // This is the target location where the guide is to be moved.
        gtk_label_set_text(GTK_LABEL(m), _(" absolute to "));
        mode = true;
    }
}

static void guide_dialog_close(GtkWidget *widget, gpointer data)
{
    gtk_widget_hide(GTK_WIDGET(d));
}

static void guide_dialog_apply(SPGuide &guide)
{
    gdouble const raw_dist = gtk_spin_button_get_value_as_float(GTK_SPIN_BUTTON(e));
    SPUnit const &unit = *sp_unit_selector_get_unit(SP_UNIT_SELECTOR(u));
    gdouble const points = sp_units_get_pixels(raw_dist, unit);
    gdouble const newpos = ( mode
                             ? points
                             : guide.position + points );
    sp_guide_moveto(guide, newpos, true);
    sp_document_done(SP_OBJECT_DOCUMENT(&guide));
}

static void guide_dialog_ok(GtkWidget *widget, gpointer g)
{
    SPGuide &guide = **static_cast<SPGuide**>(g);
    guide_dialog_apply(guide);
    guide_dialog_close(NULL, GTK_DIALOG(widget));
}

static void guide_dialog_delete(GtkWidget *widget, SPGuide **guide)
{
    SPDocument *doc = SP_OBJECT_DOCUMENT(*guide);
    sp_guide_remove(*guide);
    sp_document_done(doc);
    guide_dialog_close(NULL, GTK_DIALOG(widget));
}

static void guide_dialog_response(GtkDialog *dialog, gint response, gpointer data)
{
    GtkWidget *widget = GTK_WIDGET(dialog);
    
    switch (response) {
      case GTK_RESPONSE_OK:
            guide_dialog_ok(widget, data);
            break;
      case -12:
            guide_dialog_delete(widget, (SPGuide**) data);
            break;
      case GTK_RESPONSE_CLOSE:
            guide_dialog_close(widget, (GtkDialog*) data);
            break;
      case GTK_RESPONSE_DELETE_EVENT:
            break;
/*    case GTK_RESPONSE_APPLY:
        guide_dialog_apply(widget, data);
        break;
*/
      default:
            g_assert_not_reached();
    }
}

static void sp_dt_simple_guide_dialog(SPGuide *guide, SPDesktop *desktop)
{
    if (!GTK_IS_WIDGET(d)) {
        // create dialog
        d = gtk_dialog_new_with_buttons(_("Guideline"),
                                        NULL,
                                        GTK_DIALOG_MODAL,
                                        GTK_STOCK_OK,
                                        GTK_RESPONSE_OK,
                                        GTK_STOCK_DELETE,
                                        -12, /* DELETE */
                                        GTK_STOCK_CLOSE,
                                        GTK_RESPONSE_CLOSE,
                                        NULL);
        sp_transientize(d);
        gtk_widget_hide(d);
        
        GtkWidget *b1 = gtk_hbox_new(FALSE, 4);
        gtk_box_pack_start(GTK_BOX(GTK_DIALOG(d)->vbox), b1, FALSE, FALSE, 0);
        gtk_container_set_border_width(GTK_CONTAINER(b1), 4);
        gtk_widget_show(b1);
        
        GtkWidget *b2 = gtk_vbox_new(FALSE, 4);
        gtk_box_pack_end(GTK_BOX(b1), b2, TRUE, TRUE, 0);
        gtk_widget_show(b2);
        
        //labels
        GtkWidget *b3 = gtk_hbox_new(FALSE, 4);
        gtk_box_pack_start(GTK_BOX(b2), b3, TRUE, TRUE, 0);
        gtk_widget_show(b3);
        
        l1 = gtk_label_new("foo1");
        gtk_box_pack_start(GTK_BOX(b3), l1, TRUE, TRUE, 0);
        gtk_misc_set_alignment(GTK_MISC(l1), 1.0, 0.5);
        gtk_widget_show(l1);
        
        l2 = gtk_label_new("foo2");
        gtk_box_pack_start(GTK_BOX(b3), l2, TRUE, TRUE, 0);
        gtk_misc_set_alignment(GTK_MISC(l2), 0.0, 0.5);
        gtk_widget_show(l2);
        
        GtkWidget *b4 = gtk_hbox_new(FALSE, 4);
        gtk_box_pack_start(GTK_BOX(b2), b4, FALSE, FALSE, 0);
        gtk_widget_show(b4);
        // mode button
        GtkWidget *but = gtk_button_new();
        gtk_button_set_relief(GTK_BUTTON(but), GTK_RELIEF_NONE);
        gtk_box_pack_start(GTK_BOX(b4), but, FALSE, TRUE, 0);
        gtk_signal_connect_while_alive(GTK_OBJECT(but), "clicked", GTK_SIGNAL_FUNC(guide_dialog_mode_changed), 
                                       NULL , GTK_OBJECT(but));
        gtk_widget_show(but);
        m = gtk_label_new(_(" absolute to "));
        mode = true;
        gtk_container_add(GTK_CONTAINER(but), m);
        gtk_widget_show(m);
        
        // unitmenu
        /* fixme: We should allow percents here too, as percents of the canvas size */
        u = sp_unit_selector_new(SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE);
        sp_unit_selector_set_unit(SP_UNIT_SELECTOR(u), desktop->namedview->doc_units);
        
        // spinbutton
        GtkObject *a = gtk_adjustment_new(0.0, -SP_DESKTOP_SCROLL_LIMIT, SP_DESKTOP_SCROLL_LIMIT, 1.0, 10.0, 10.0);
        sp_unit_selector_add_adjustment(SP_UNIT_SELECTOR(u), GTK_ADJUSTMENT(a));
        e = gtk_spin_button_new(GTK_ADJUSTMENT(a), 1.0 , 2);
        gtk_widget_show(e);
        gtk_spin_button_set_numeric(GTK_SPIN_BUTTON(e), TRUE);
        gtk_box_pack_start(GTK_BOX(b4), e, TRUE, TRUE, 0);
        gtk_signal_connect_object(GTK_OBJECT(e), "activate",
                                  GTK_SIGNAL_FUNC(gtk_window_activate_default), 
                                  GTK_OBJECT(d));
/*          gnome_dialog_editable_enters(GNOME_DIALOG(d), GTK_EDITABLE(e));  */
        
        gtk_widget_show(u);
        gtk_box_pack_start(GTK_BOX(b4), u, FALSE, FALSE, 0);
        
        
        // dialog
        gtk_dialog_set_default_response(GTK_DIALOG(d), GTK_RESPONSE_OK);
        gtk_signal_connect(GTK_OBJECT(d), "response", GTK_SIGNAL_FUNC(guide_dialog_response), &g);
        gtk_signal_connect(GTK_OBJECT(d), "delete_event", GTK_SIGNAL_FUNC(gtk_widget_hide_on_delete), GTK_WIDGET(d));
    }
    
    // initialize dialog
    g = guide;
    oldpos = guide->position;
    {
        char *guide_description = sp_guide_description(guide);
        char *label = g_strdup_printf(_("Move %s"), guide_description);
        g_free(guide_description);
        gtk_label_set(GTK_LABEL(l1), label);
        g_free(label);
    }
    
    SPUnit const &unit = *sp_unit_selector_get_unit(SP_UNIT_SELECTOR(u));
    gdouble const val = sp_pixels_get_units(oldpos, unit);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(e), val);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(e), val);
    gtk_widget_grab_focus(e);
    gtk_editable_select_region(GTK_EDITABLE(e), 0, 20);
    gtk_window_set_position(GTK_WINDOW(d), GTK_WIN_POS_MOUSE);
    
    gtk_widget_show(d);
}


/*
  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 :