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(svn r16140) -Codechange: Call a function while contructing a widget tree.
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@ -1400,13 +1400,15 @@ bool CompareWidgetArrays(const Widget *orig, const Widget *gen, bool report)
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* @param parts Array with parts of the nested widget.
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* @param count Length of the \a parts array.
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* @param dest Address of pointer to use for returning the composed widget.
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* @param fill_dest Fill the composed widget with child widgets.
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* @return Number of widget part elements used to compose the widget.
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*/
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static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest)
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static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest, bool *fill_dest)
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{
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int num_used = 0;
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*dest = NULL;
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*fill_dest = false;
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while (count > num_used) {
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switch (parts->type) {
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@ -1418,11 +1420,13 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest)
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case NWID_HORIZONTAL:
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if (*dest != NULL) return num_used;
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*dest = new NWidgetHorizontal();
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*fill_dest = true;
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break;
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case NWID_HORIZONTAL_LTR:
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if (*dest != NULL) return num_used;
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*dest = new NWidgetHorizontalLTR();
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*fill_dest = true;
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break;
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case WWT_PANEL:
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@ -1430,11 +1434,19 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest)
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case WWT_FRAME:
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if (*dest != NULL) return num_used;
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*dest = new NWidgetBackground(parts->type, parts->u.widget.colour, parts->u.widget.index);
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*fill_dest = true;
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break;
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case NWID_VERTICAL:
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if (*dest != NULL) return num_used;
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*dest = new NWidgetVertical();
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*fill_dest = true;
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break;
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case WPT_FUNCTION:
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if (*dest != NULL) return num_used;
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*dest = parts->u.func_ptr();
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*fill_dest = false;
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break;
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case WPT_RESIZE: {
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@ -1550,7 +1562,8 @@ static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase *pare
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int total_used = 0;
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while (true) {
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NWidgetBase *sub_widget = NULL;
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int num_used = MakeNWidget(parts, count - total_used, &sub_widget);
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bool fill_sub = false;
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int num_used = MakeNWidget(parts, count - total_used, &sub_widget, &fill_sub);
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parts += num_used;
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total_used += num_used;
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@ -1563,7 +1576,7 @@ static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase *pare
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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 (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL || tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET) {
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if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL || tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET)) {
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int num_used = MakeWidgetTree(parts, count - total_used, sub_widget);
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parts += num_used;
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total_used += num_used;
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@ -112,6 +112,7 @@ enum WidgetType {
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WPT_PADDING, ///< Widget part for specifying a padding.
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WPT_PIPSPACE, ///< Widget part for specifying pre/inter/post space for containers.
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WPT_ENDCONTAINER, ///< Widget part to denote end of a container.
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WPT_FUNCTION, ///< Widget part for calling a user function.
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/* Pushable window widget types. */
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WWT_MASK = 0x7F,
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@ -312,6 +313,9 @@ struct NWidgetPartPIP {
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uint8 pre, inter, post; ///< Amount of space before/between/after child widgets.
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};
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/** Pointer to function returning a nested widget. */
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typedef NWidgetBase *NWidgetFunctionType();
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/** Partial widget specification to allow NWidgets to be written nested. */
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struct NWidgetPart {
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WidgetType type; ///< Type of the part. @see NWidgetPartType.
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@ -323,6 +327,7 @@ struct NWidgetPart {
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NWidgetPartWidget widget; ///< Part with a start of a widget.
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NWidgetPartPaddings padding; ///< Part with paddings.
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NWidgetPartPIP pip; ///< Part with pre/inter/post spaces.
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NWidgetFunctionType *func_ptr; ///< Part with a function call.
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} u;
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};
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@ -523,6 +528,16 @@ static inline NWidgetPart NWidget(WidgetType tp)
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return part;
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}
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static inline NWidgetPart NWidgetFunction(NWidgetFunctionType *func_ptr)
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{
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NWidgetPart part;
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part.type = WPT_FUNCTION;
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part.u.func_ptr = func_ptr;
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return part;
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}
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NWidgetContainer *MakeNWidgets(const NWidgetPart *parts, int count);
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#endif /* WIDGET_TYPE_H */
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