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Codechange: Add and use GetScrolledItemFromWidget to get a list item.

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This function returns an iterator, either to the selected item or the
container's end.

This makes handling the result more robust as indices are not used.
This commit is contained in:
Peter Nelson
2023-05-12 12:58:31 +01:00
committed by PeterN
parent 86e5dfce3d
commit 941dbadf9e
16 changed files with 91 additions and 74 deletions
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6
src/town_gui.cpp
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@@ -942,10 +942,10 @@ public:
break;
case WID_TD_LIST: { // Click on Town Matrix
uint id_v = this->vscroll->GetScrolledRowFromWidget(pt.y, this, WID_TD_LIST, WidgetDimensions::scaled.framerect.top);
if (id_v >= this->towns.size()) return; // click out of town bounds
auto it = this->vscroll->GetScrolledItemFromWidget(this->towns, pt.y, this, WID_TD_LIST, WidgetDimensions::scaled.framerect.top);
if (it == this->towns.end()) return; // click out of town bounds
const Town *t = this->towns[id_v];
const Town *t = *it;
assert(t != nullptr);
if (_ctrl_pressed) {
ShowExtraViewportWindow(t->xy);