/*! \brief Property change notification for any/all settings
*
* \param [in] w_current
*/
static void
notify_options (GschemToplevel *w_current)
{
g_return_if_fail (w_current != NULL);
/* Events can occur before the drawing area is created */
if (w_current->drawing_area != NULL) {
/* maybe remove those two lines
* gschem_toplevel_get_toplevel (w_current)->page_current->CHANGED=1;
* o_undo_savestate_old(w_current, UNDO_ALL);
*/
i_update_grid_info (w_current);
gschem_page_view_invalidate_all (gschem_toplevel_get_current_page_view (w_current));
}
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*
*/
void a_pan_general(GSCHEM_TOPLEVEL *w_current, double world_cx, double world_cy,
double relativ_zoom_factor,int flags)
{
TOPLEVEL *toplevel = w_current->toplevel;
/* see libgeda/include/defines.h for flags */
/*if the borders should be ignored always, remove, outcomment or changes
the flags in the function-calls*/
/* flags |= A_PAN_IGNORE_BORDERS;
*/
/* think it's better that the zoomfactor is defined as pix/mills
this will be the same as w_current->page_current->to_screen_x/y_constant*/
int zoom_max = 5;
int diff;
double zx, zy, zoom_old, zoom_new, zoom_min;
#if DEBUG
printf("a_pan_general(): world_cx=%f, world_cy=%f\n",world_cx, world_cy);
#endif
/* calc minimum zoomfactors and choose the smaller one. They are equal
if the aspectratio of the world is the same as the screen ratio */
zx = (double) toplevel->width / (toplevel->init_right -
toplevel->init_left);
zy = (double) toplevel->height / (toplevel->init_bottom -
toplevel->init_top);
zoom_min = zx < zy ? zx : zy;
#if DEBUG
printf(" zx_min=%f, zy_min=%f , flags=%d\n ",zx, zy, flags);
#endif
/* to_screen_x_constant and to_screen_y_constant are almost the same.
lets use to_screen_y_constant */
zoom_old = toplevel->page_current->to_screen_y_constant;
/* calc new zooming factor */
/* check if there's a zoom_full (relativ_zoom_factor == -1) */
if (relativ_zoom_factor <0) {
zoom_new = zoom_min;
}
else {
zoom_new = zoom_old * relativ_zoom_factor;
zoom_new = zoom_new > zoom_max ? zoom_max : zoom_new;
if (!(flags & A_PAN_IGNORE_BORDERS)) {
zoom_new = zoom_new < zoom_min ? zoom_min : zoom_new;
}
}
/* calculate the new visible area; adding 0.5 to round */
toplevel->page_current->left = world_cx - (double) toplevel->width
/ 2 / zoom_new + 0.5;
toplevel->page_current->right = world_cx + (double) toplevel->width
/ 2 / zoom_new + 0.5;
toplevel->page_current->top = world_cy - (double) toplevel->height
/ 2 / zoom_new + 0.5;
toplevel->page_current->bottom = world_cy + (double) toplevel->height
/ 2 / zoom_new + 0.5;
/* and put it back to the borders */
if (!(flags & A_PAN_IGNORE_BORDERS)) {
/* check right border */
if (toplevel->page_current->right > toplevel->init_right) {
toplevel->page_current->left += toplevel->init_right -
toplevel->page_current->right;
toplevel->page_current->right = toplevel->init_right;
}
/* check left border */
if (toplevel->page_current->left < toplevel->init_left) {
toplevel->page_current->right += toplevel->init_left -
toplevel->page_current->left;
toplevel->page_current->left = toplevel->init_left;
}
/* If there is any slack, center the view */
diff = (toplevel->page_current->right -
toplevel->page_current->left) -
(toplevel->init_right - toplevel->init_left);
if (diff > 0) {
toplevel->page_current->left -= diff / 2;
toplevel->page_current->right -= diff / 2;
}
/* check bottom border */
if (toplevel->page_current->bottom > toplevel->init_bottom) {
toplevel->page_current->top += toplevel->init_bottom -
toplevel->page_current->bottom;
toplevel->page_current->bottom = toplevel->init_bottom;
}
/* check top border */
if (toplevel->page_current->top < toplevel->init_top) {
toplevel->page_current->bottom += toplevel->init_top -
toplevel->page_current->top;
toplevel->page_current->top = toplevel->init_top;
}
/* If there is any slack, center the view */
diff = (toplevel->page_current->bottom -
toplevel->page_current->top) -
(toplevel->init_bottom - toplevel->init_top);
if (diff > 0) {
toplevel->page_current->top -= diff / 2;
toplevel->page_current->bottom -= diff / 2;
}
}
#if DEBUG
printf("zoom_old: %f, zoom_new: %f \n ",zoom_old, zoom_new);
printf("left: %d, right: %d, top: %d, bottom: %d\n",
toplevel->page_current->left, toplevel->page_current->right,
toplevel->page_current->top, toplevel->page_current->bottom);
printf("aspect: %f\n",
(float) fabs(toplevel->page_current->right
- toplevel->page_current->left) /
(float) fabs(toplevel->page_current->bottom
- toplevel->page_current->top ));
#endif
/* set_window */
set_window(toplevel, toplevel->page_current,
toplevel->page_current->left ,
toplevel->page_current->right ,
toplevel->page_current->top ,
toplevel->page_current->bottom);
i_update_grid_info (w_current);
/* redraw */
if (!(flags & A_PAN_DONT_REDRAW)) {
x_scrollbars_update(w_current);
o_invalidate_all (w_current);
}
}
