/**************************************************************************
...
**************************************************************************/
void scrollbar_scroll_callback(Widget w, XtPointer client_data,
XtPointer position_val)
{
int position = XTPOINTER_TO_INT(position_val);
int scroll_x, scroll_y, xstep, ystep;
get_mapview_scroll_pos(&scroll_x, &scroll_y);
get_mapview_scroll_step(&xstep, &ystep);
if (!can_client_change_view()) {
return;
}
if(w==map_horizontal_scrollbar) {
if (position > 0) {
scroll_x += xstep;
} else {
scroll_x -= xstep;
}
}
else {
if (position > 0) {
scroll_y += ystep;
} else {
scroll_y -= ystep;
}
}
set_mapview_scroll_pos(scroll_x, scroll_y);
update_map_canvas_scrollbars();
}
/**************************************************************************
...
**************************************************************************/
void update_map_canvas_scrollbars(void)
{
int scroll_x, scroll_y;
get_mapview_scroll_pos(&scroll_x, &scroll_y);
gtk_adjustment_set_value(GTK_ADJUSTMENT(map_hadj), scroll_x);
gtk_adjustment_set_value(GTK_ADJUSTMENT(map_vadj), scroll_y);
}
/**************************************************************************
Refresh map canvas scrollbars
**************************************************************************/
void update_map_canvas_scrollbars(void)
{
int scroll_x, scroll_y;
get_mapview_scroll_pos(&scroll_x, &scroll_y);
gtk_adjustment_set_value(map_hadj, scroll_x);
gtk_adjustment_set_value(map_vadj, scroll_y);
if (can_client_change_view()) {
gtk_widget_queue_draw(overview_canvas);
}
}
/**************************************************************************
...
**************************************************************************/
void scrollbar_jump_callback(GtkAdjustment *adj, gpointer hscrollbar)
{
int scroll_x, scroll_y;
if (!can_client_change_view()) {
return;
}
get_mapview_scroll_pos(&scroll_x, &scroll_y);
if (hscrollbar) {
scroll_x = adj->value;
} else {
scroll_y = adj->value;
}
set_mapview_scroll_pos(scroll_x, scroll_y);
}
/**************************************************************************
...
**************************************************************************/
void update_map_canvas_scrollbars(void)
{
float shown_h, top_h, shown_v, top_v;
int xmin, ymin, xmax, ymax, xsize, ysize;
int scroll_x, scroll_y;
get_mapview_scroll_window(&xmin, &ymin, &xmax, &ymax, &xsize, &ysize);
get_mapview_scroll_pos(&scroll_x, &scroll_y);
top_h = (float)(scroll_x - xmin) / (float)(xmax - xmin);
top_v = (float)(scroll_y - ymin) / (float)(ymax - ymin);
shown_h = (float)xsize / (float)(xmax - xmin);
shown_v = (float)ysize / (float)(ymax - ymin);
XawScrollbarSetThumb(map_horizontal_scrollbar, top_h, shown_h);
XawScrollbarSetThumb(map_vertical_scrollbar, top_v, shown_v);
}
/**************************************************************************
...
**************************************************************************/
void scrollbar_jump_callback(Widget w, XtPointer client_data,
XtPointer percent_ptr)
{
float percent=*(float*)percent_ptr;
int xmin, ymin, xmax, ymax, xsize, ysize;
int scroll_x, scroll_y;
if (!can_client_change_view()) {
return;
}
get_mapview_scroll_window(&xmin, &ymin, &xmax, &ymax, &xsize, &ysize);
get_mapview_scroll_pos(&scroll_x, &scroll_y);
if(w==map_horizontal_scrollbar) {
scroll_x = xmin + (percent * (xmax - xmin));
} else {
scroll_y = ymin + (percent * (ymax - ymin));
}
set_mapview_scroll_pos(scroll_x, scroll_y);
}