mirror of https://github.com/OpenTTD/OpenTTD
(svn r18584) -Codechange: Generalize MakeWidgetTree to read only one widget (recursively).
parent
ca66652005
commit
b3ecc90992
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@ -2270,17 +2270,18 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest,
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* Build a nested widget tree by recursively filling containers with nested widgets read from their parts.
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* @param parts Array with parts of the nested widgets.
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* @param count Length of the \a parts array.
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* @param parent Container to use for storing the child widgets.
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* @param parent Pointer or container to use for storing the child widgets (*parent == NULL or *parent == container or background widget).
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* @param biggest_index Pointer to biggest nested widget index in the tree.
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* @return Number of widget part elements used to fill the container.
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* @post \c *biggest_index contains the largest widget index of the tree and \c -1 if no index is used.
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*/
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static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase *parent, int *biggest_index)
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static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase **parent, int *biggest_index)
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{
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/* Given parent must be either a #NWidgetContainer or a #NWidgetBackground object. */
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NWidgetContainer *nwid_cont = dynamic_cast<NWidgetContainer *>(parent);
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NWidgetBackground *nwid_parent = dynamic_cast<NWidgetBackground *>(parent);
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assert((nwid_cont != NULL && nwid_parent == NULL) || (nwid_cont == NULL && nwid_parent != NULL));
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/* If *parent == NULL, only the first widget is read and returned. Otherwise, *parent must point to either
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* a #NWidgetContainer or a #NWidgetBackground object, and parts are added as much as possible. */
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NWidgetContainer *nwid_cont = dynamic_cast<NWidgetContainer *>(*parent);
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NWidgetBackground *nwid_parent = dynamic_cast<NWidgetBackground *>(*parent);
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assert(*parent == NULL || (nwid_cont != NULL && nwid_parent == NULL) || (nwid_cont == NULL && nwid_parent != NULL));
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int total_used = 0;
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while (true) {
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@ -2293,18 +2294,23 @@ static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase *pare
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/* Break out of loop when end reached */
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if (sub_widget == NULL) break;
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/* Add sub_widget to parent container. */
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if (nwid_cont) nwid_cont->Add(sub_widget);
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if (nwid_parent) nwid_parent->Add(sub_widget);
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/* If sub-widget is a container, recursively fill that container. */
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WidgetType tp = sub_widget->type;
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if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL
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|| tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET || tp == NWID_SELECTION)) {
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int num_used = MakeWidgetTree(parts, count - total_used, sub_widget, biggest_index);
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NWidgetBase *sub_ptr = sub_widget;
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int num_used = MakeWidgetTree(parts, count - total_used, &sub_ptr, biggest_index);
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parts += num_used;
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total_used += num_used;
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}
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/* Add sub_widget to parent container if available, otherwise return the widget to the caller. */
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if (nwid_cont) nwid_cont->Add(sub_widget);
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if (nwid_parent) nwid_parent->Add(sub_widget);
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if (!nwid_cont && !nwid_parent) {
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*parent = sub_widget;
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return total_used;
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}
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}
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if (count == total_used) return total_used; // Reached the end of the array of parts?
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@ -2329,6 +2335,7 @@ NWidgetContainer *MakeNWidgets(const NWidgetPart *parts, int count, int *biggest
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{
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*biggest_index = -1;
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if (container == NULL) container = new NWidgetVertical();
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MakeWidgetTree(parts, count, container, biggest_index);
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NWidgetBase *cont_ptr = container;
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MakeWidgetTree(parts, count, &cont_ptr, biggest_index);
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return container;
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}
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