gseisviewtoolmagnify.c

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                new_rect_element = G_SEIS_VIEW_TOOL_RECT_LL;
            } else if (data_visibility->fast_pointer_pos_data > private->fast_start_data &&
                       data_visibility->fast_pointer_pos_data < private->fast_end_data) {
                new_cursor = private->vert_scale_cursor;
                new_rect_element = G_SEIS_VIEW_TOOL_RECT_VL;
            }
        } else if (vert_right_dist < slow_epsilon) {
            if (upper_horiz_dist < fast_epsilon) {
                new_cursor = private->ur_angle_cursor;
                new_rect_element = G_SEIS_VIEW_TOOL_RECT_UR;
            } else if (lower_horiz_dist < fast_epsilon) {
                new_cursor = private->lr_angle_cursor;
                new_rect_element = G_SEIS_VIEW_TOOL_RECT_LR;
            } else if (data_visibility->fast_pointer_pos_data > private->fast_start_data &&
                       data_visibility->fast_pointer_pos_data < private->fast_end_data) {
                new_cursor = private->vert_scale_cursor;
                new_rect_element = G_SEIS_VIEW_TOOL_RECT_VR;
            }
        } else if (data_visibility->slow_pointer_pos_data > private->slow_start_data &&
                   data_visibility->slow_pointer_pos_data < private->slow_end_data &&
                   data_visibility->fast_pointer_pos_data > private->fast_start_data &&
                   data_visibility->fast_pointer_pos_data < private->fast_end_data) {
            new_cursor = private->fleur_cursor;
            new_rect_element = G_SEIS_VIEW_TOOL_RECT_INSIDE;
        }

        if (new_cursor != private->current_cursor) {
            private->current_cursor = new_cursor;
            private->rect_element = new_rect_element;
            if (private->is_threaded)
                gdk_threads_enter ();
            gdk_window_set_cursor (seis_view_gl->window, new_cursor);
            gdk_flush ();
            if (private->is_threaded)
                gdk_threads_leave ();
        }
    }
}

static void g_seis_view_tool_redraw_event_int (GSeisViewTool *tool, GtkWidget *seis_view_gl,
                                               GSeisViewDataVisibility *data_visibility) {
    GSeisViewToolMagnifyPrivate *private = G_SEIS_VIEW_TOOL_MAGNIFY_GET_PRIVATE (G_SEIS_VIEW_TOOL (tool));

    if (private->has_rectangle)
        g_seis_view_tool_magnify_draw_rect (tool, seis_view_gl, data_visibility, TRUE);
}

static void g_seis_view_tool_magnify_init (GSeisViewToolMagnify *self) {
    GSeisViewToolMagnifyPrivate *private = G_SEIS_VIEW_TOOL_MAGNIFY_GET_PRIVATE (self);

    (G_SEIS_VIEW_TOOL (self))->event_mask |= G_SEIS_VIEW_TOOL_MOTION_EVENT |
                                             G_SEIS_VIEW_TOOL_BUTTON_EVENT |
                                             G_SEIS_VIEW_TOOL_SCROLL_EVENT |
                                             G_SEIS_VIEW_TOOL_REDRAW_EVENT;

    (G_SEIS_VIEW_TOOL (self))->show_cross = TRUE;

    private->slow_start_data = 0.375;
    private->slow_end_data = 0.625;
    private->fast_start_data = 0.375;
    private->fast_end_data = 0.625;

    private->dragging = FALSE;
    private->has_rectangle = TRUE;

    private->horiz_scale_cursor = gdk_cursor_new (GDK_SB_V_DOUBLE_ARROW);
    private->vert_scale_cursor = gdk_cursor_new (GDK_SB_H_DOUBLE_ARROW);
    private->ur_angle_cursor = gdk_cursor_new (GDK_UR_ANGLE);
    private->ul_angle_cursor = gdk_cursor_new (GDK_UL_ANGLE);
    private->lr_angle_cursor = gdk_cursor_new (GDK_LR_ANGLE);
    private->ll_angle_cursor = gdk_cursor_new (GDK_LL_ANGLE);
    private->fleur_cursor = gdk_cursor_new (GDK_FLEUR);

    private->current_cursor = NULL;
    private->rect_element = G_SEIS_VIEW_TOOL_RECT_OUTSIDE;

    private->is_threaded = FALSE;
    private->data_mutex = NULL;

#ifdef DEBUG
    g_print ("<GSeisViewToolMagnify is inited>\n");
#endif
}

static void g_seis_view_tool_magnify_finalize (GObject *object) {
    GSeisViewToolMagnifyPrivate *private = G_SEIS_VIEW_TOOL_MAGNIFY_GET_PRIVATE (G_SEIS_VIEW_TOOL_MAGNIFY (object));

    if (private->horiz_scale_cursor)
        gdk_cursor_unref (private->horiz_scale_cursor);
    if (private->vert_scale_cursor)
        gdk_cursor_unref (private->vert_scale_cursor);
    if (private->ur_angle_cursor)
        gdk_cursor_unref (private->ur_angle_cursor);
    if (private->ul_angle_cursor)
        gdk_cursor_unref (private->ul_angle_cursor);
    if (private->lr_angle_cursor)
        gdk_cursor_unref (private->lr_angle_cursor);
    if (private->ll_angle_cursor)
        gdk_cursor_unref (private->ll_angle_cursor);
    if (private->fleur_cursor)
        gdk_cursor_unref (private->fleur_cursor);

    if (private->data_mutex)
        g_mutex_free (private->data_mutex);

#ifdef DEBUG
    g_print ("<GSeisViewToolMagnify is finalized>\n");
#endif
    if (G_OBJECT_CLASS (g_seis_view_tool_magnify_parent_class)->finalize)
        G_OBJECT_CLASS (g_seis_view_tool_magnify_parent_class)->finalize (object);
}

enum {
    PROP_0,
    PROP_SLOW_START,
    PROP_SLOW_END,
    PROP_FAST_START,
    PROP_FAST_END   
};

static void g_seis_view_tool_magnify_set_property (GObject *object, guint prop_id,
                                                   const GValue *value, GParamSpec *pspec) {
    GSeisViewToolMagnify *self = G_SEIS_VIEW_TOOL_MAGNIFY (object);
    GSeisViewToolMagnifyPrivate *private = G_SEIS_VIEW_TOOL_MAGNIFY_GET_PRIVATE (self);

    if (private->data_mutex)
        g_mutex_lock (private->data_mutex);
    switch (prop_id) {
        case PROP_SLOW_START:
            private->slow_start_data =  g_value_get_double (value);
            g_object_notify (object, "slow_start");
            break;
        case PROP_SLOW_END:
            private->slow_end_data =  g_value_get_double (value);
            g_object_notify (object, "slow_end");
            break;
        case PROP_FAST_START:
            private->fast_start_data =  g_value_get_double (value);
            g_object_notify (object, "fast_start");
            break;
        case PROP_FAST_END:
            private->fast_end_data =  g_value_get_double (value);
            g_object_notify (object, "fast_end");
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
            break;
    }
    if (private->data_mutex)
        g_mutex_unlock (private->data_mutex);
}

static void g_seis_view_tool_magnify_get_property (GObject *object, guint prop_id,
                                                   GValue *value, GParamSpec *pspec) {
    GSeisViewToolMagnify *self = G_SEIS_VIEW_TOOL_MAGNIFY (object);
    GSeisViewToolMagnifyPrivate *private = G_SEIS_VIEW_TOOL_MAGNIFY_GET_PRIVATE (self);

    if (private->data_mutex)
        g_mutex_lock (private->data_mutex);
    switch (prop_id) {
        case PROP_SLOW_START:
            g_value_set_double (value, private->slow_start_data);
            break;
        case PROP_SLOW_END:
            g_value_set_double (value, private->slow_end_data);
            break;
        case PROP_FAST_START:
            g_value_set_double (value, private->fast_start_data);
            break;
        case PROP_FAST_END:
            g_value_set_double (value, private->fast_end_data);
            break;
        default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
            break;
    }
    if (private->data_mutex)
        g_mutex_unlock (private->data_mutex);
}

static void g_seis_view_tool_magnify_class_init (GSeisViewToolMagnifyClass *klass) {
    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
    GSeisViewToolClass *tool_class = G_SEIS_VIEW_TOOL_CLASS (klass);

    gobject_class->finalize = g_seis_view_tool_magnify_finalize;
    gobject_class->set_property = g_seis_view_tool_magnify_set_property;
    gobject_class->get_property = g_seis_view_tool_magnify_get_property;

    g_type_class_add_private (klass, sizeof (GSeisViewToolMagnifyPrivate));

    tool_class->view_attach_notify = g_seis_view_tool_attach_notify_int;
    tool_class->view_detach_notify = g_seis_view_tool_detach_notify_int;
    tool_class->view_button_event = g_seis_view_tool_button_event_int;
    tool_class->view_scroll_event = g_seis_view_tool_scroll_event_int;
    tool_class->view_motion_event = g_seis_view_tool_motion_event_int;
    tool_class->view_redraw_event = g_seis_view_tool_redraw_event_int;

    klass->magnify_viewport = NULL;

    klass->magnify_viewport_id = g_signal_new ("magnify_viewport",
                                               G_TYPE_FROM_CLASS ((gpointer)G_OBJECT_CLASS (klass)),
                                               G_SIGNAL_RUN_LAST,
                                               G_STRUCT_OFFSET (GSeisViewToolMagnifyClass, magnify_viewport),
                                               NULL, NULL,
                                               gtkseisviewgl_marshal_VOID__DOUBLE_DOUBLE_DOUBLE_DOUBLE,
                                               G_TYPE_NONE, 4,
                                               G_TYPE_DOUBLE, G_TYPE_DOUBLE, G_TYPE_DOUBLE, G_TYPE_DOUBLE);

    g_object_class_install_property (gobject_class,
                                     PROP_SLOW_START,
                                     g_param_spec_double ("slow_start", "SlowStart",
                                     "Start position of the magnify area in the data space [0; 1] (slow dimension)",
                                     0, 1, 0.375,
                                     G_PARAM_READWRITE));

    g_object_class_install_property (gobject_class,
                                     PROP_SLOW_END,
                                     g_param_spec_double ("slow_end", "SlowEnd",
                                     "End position of the magnify area in the data space [0; 1] (slow dimesnion)",
                                     0, 1, 0.625,
                                     G_PARAM_READWRITE));

    g_object_class_install_property (gobject_class,
                                     PROP_FAST_START,
                                     g_param_spec_double ("fast_start", "FastStart",
                                     "Start position of the magnify area in the data space [0; 1] (fast dimension)",
                                     0, 1, 0.375,
                                     G_PARAM_READWRITE));

    g_object_class_install_property (gobject_class,
                                     PROP_FAST_END,
                                     g_param_spec_double ("fast_end", "FastEnd",
                                     "End position of the magnify area in the data space [0; 1] (fast dimesnion)",
                                     0, 1, 0.625,
                                     G_PARAM_READWRITE));

#ifdef DEBUG
    g_print ("<GSeisViewToolMagnify class is inited>\n");
#endif
}

GSeisViewToolMagnify* g_seis_view_tool_magnify_new () {
    return g_object_new (G_SEIS_TYPE_VIEW_TOOL_MAGNIFY, NULL);
}