/* Zoom around the middle point of the visible area
*/
void
ddisplay_zoom_middle(DDisplay *ddisp, real magnify)
{
Point middle;
Rectangle *visible;
visible = &ddisp->visible;
middle.x = visible->left*0.5 + visible->right*0.5;
middle.y = visible->top*0.5 + visible->bottom*0.5;
ddisplay_zoom (ddisp, &middle, magnify);
}
static PyObject *
PyDiaDisplay_Zoom(PyDiaDisplay *self, PyObject *args)
{
Point p;
double zoom;
if (!PyArg_ParseTuple(args, "(dd)d:Display.zoom", &p.x, &p.y, &zoom))
return NULL;
ddisplay_zoom(self->disp, &p, zoom);
Py_INCREF(Py_None);
return Py_None;
}
void
ddisplay_show_all (DDisplay *ddisp)
{
Diagram *dia;
real magnify_x, magnify_y;
int width, height;
Point middle;
g_return_if_fail (ddisp != NULL);
dia = ddisp->diagram;
width = dia_renderer_get_width_pixels (ddisp->renderer);
height = dia_renderer_get_height_pixels (ddisp->renderer);
/* if there is something selected show that instead of all exisiting objects */
if (dia->data->selected) {
GList *list = dia->data->selected;
Rectangle extents = *dia_object_get_enclosing_box ((DiaObject*)list->data);
list = g_list_next(list);
while (list) {
DiaObject *obj = (DiaObject *)list->data;
rectangle_union(&extents, dia_object_get_enclosing_box (obj));
list = g_list_next(list);
}
magnify_x = (real)width / (extents.right - extents.left) / ddisp->zoom_factor;
magnify_y = (real)height / (extents.bottom - extents.top) / ddisp->zoom_factor;
middle.x = extents.left + (extents.right - extents.left) / 2.0;
middle.y = extents.top + (extents.bottom - extents.top) / 2.0;
} else {
magnify_x = (real)width /
(dia->data->extents.right - dia->data->extents.left) / ddisp->zoom_factor;
magnify_y = (real)height /
(dia->data->extents.bottom - dia->data->extents.top) / ddisp->zoom_factor;
middle.x = dia->data->extents.left +
(dia->data->extents.right - dia->data->extents.left) / 2.0;
middle.y = dia->data->extents.top +
(dia->data->extents.bottom - dia->data->extents.top) / 2.0;
}
ddisplay_zoom (ddisp, &middle,
((magnify_x<magnify_y)?magnify_x:magnify_y)/1.05);
ddisplay_update_scrollbars(ddisp);
ddisplay_add_update_all(ddisp);
ddisplay_flush(ddisp);
}