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Add a callback when the selection in a listbox changes.

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This commit is contained in:
Mark de Wever 2008-07-25 19:10:49 +00:00
parent ffd25de2a4
commit d42c3fce15
2 changed files with 20 additions and 2 deletions
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7
src/gui/widgets/listbox.cpp
View File

@ -87,6 +87,7 @@ tlistbox::tlistbox() :
list_rect_(),
list_background_(),
best_spacer_size_(0, 0),
callback_value_change_(NULL),
rows_()
{
}
@ -173,7 +174,11 @@ bool tlistbox::list_row_selected(const size_t row, twidget* caller)
assert(rows_[row].grid());
if(rows_[row].grid()->has_widget(caller)) {
if(!select_row(row, !rows_[row].get_selected())) {
if(select_row(row, !rows_[row].get_selected())) {
if(callback_value_change_) {
callback_value_change_(this);
}
} else {
// if not allowed to deselect reselect.
tselectable_* selectable = dynamic_cast<tselectable_*>(caller);
assert(selectable);

15
src/gui/widgets/listbox.hpp
View File

@ -57,13 +57,19 @@ public:
*/
void list_item_selected(twidget* caller);
/***** ***** ***** setters / getters for members ***** ****** *****/
void set_callback_value_change(void (*callback) (twidget* caller))
{ callback_value_change_ = callback; }
private:
/**
* Helper for list_item_selected().
*
* Tries to sets the selected state for the row, but only if it contains the
* wanted widget.
* wanted widget. NOTE this function assumes the event was triggered by the
* user and calls the callback handler.
*
* @param row The row to test.
* @param caller The widget to look for.
@ -289,6 +295,13 @@ private:
/** The best size for the spacer, if not set it's calculated. */
tpoint best_spacer_size_;
/**
* This callback is used when the selection is chnaged due to a user event.
* The name is not fully appropriate for the event but it's choosen to be
* generic.
*/
void (*callback_value_change_) (twidget* caller);
class trow {
public: