static int
uni_nav_motion_notify (GtkWidget * widget, GdkEventMotion * ev)
{
UniNav *nav = UNI_NAV (widget);
int mx, my;
gdk_window_get_pointer (gtk_widget_get_window (widget), &mx, &my, NULL);
/* Make coordinates relative to window. */
mx -= 4;
my -= 4;
/* Convert Nav space to Zoom space coordinates. */
gdouble zoom2nav_factor = uni_nav_get_zoom2nav_factor (nav);
GdkRectangle rect;
uni_image_view_get_viewport (nav->view, &rect);
/* Convert Zoom space to Nav space coordinates. */
rect.width = (gdouble) rect.width / zoom2nav_factor;
rect.height = (gdouble) rect.height / zoom2nav_factor;
/* Subtract half of the XOR rectangles size from the coordinates. */
mx -= (rect.width / 2);
my -= (rect.height / 2);
/* Do the adjusted coordinate conversion. */
int zoom_x_ofs = mx * zoom2nav_factor;
int zoom_y_ofs = my * zoom2nav_factor;
uni_image_view_set_offset (nav->view, zoom_x_ofs, zoom_y_ofs, TRUE);
uni_nav_draw_rectangle (nav, TRUE);
return TRUE;
}
static GdkRectangle
gtk_image_get_current_rectangle (UniNav * nav)
{
GdkRectangle rect;
uni_image_view_get_viewport (nav->view, &rect);
/* Convert Zoom space to Nav space coordinates. */
gdouble zoom2nav_factor = uni_nav_get_zoom2nav_factor (nav);
rect.x = (gdouble) rect.x / zoom2nav_factor;
rect.y = (gdouble) rect.y / zoom2nav_factor;
rect.width = (gdouble) rect.width / zoom2nav_factor;
rect.height = (gdouble) rect.height / zoom2nav_factor;
return rect;
}
gboolean
uni_dragger_motion_notify (UniDragger * tool, GdkEventMotion * ev)
{
if (tool->pressed)
tool->dragging = TRUE;
else
return FALSE;
tool->drag_ofs_x = ev->x;
tool->drag_ofs_y = ev->y;
int dx, dy;
uni_dragger_get_drag_delta (tool, &dx, &dy);
if (abs (dx) < 1 && abs (dy) < 1)
return FALSE;
if ( pow(dx, 2) + pow(dy, 2) > 7 && UNI_IMAGE_VIEW(tool->view)->pixbuf != NULL &&
UNI_IMAGE_VIEW(tool->view)->vadj->upper <= UNI_IMAGE_VIEW(tool->view)->vadj->page_size &&
UNI_IMAGE_VIEW(tool->view)->hadj->upper <= UNI_IMAGE_VIEW(tool->view)->hadj->page_size )
{
uni_dragger_button_release (tool, (GdkEventButton*)ev);
gtk_drag_begin (GTK_WIDGET(tool->view),
gtk_target_list_new(target_table, G_N_ELEMENTS(target_table)),
GDK_ACTION_COPY,
1,
(GdkEvent*)ev);
return TRUE;
}
GdkRectangle viewport;
uni_image_view_get_viewport (UNI_IMAGE_VIEW (tool->view), &viewport);
int offset_x = viewport.x + dx;
int offset_y = viewport.y + dy;
uni_image_view_set_offset (UNI_IMAGE_VIEW (tool->view), offset_x,
offset_y, FALSE);
tool->drag_base_x = tool->drag_ofs_x;
tool->drag_base_y = tool->drag_ofs_y;
return TRUE;
}
