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Fixed dropdown box not putting droplist above the widget

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pelya
2015-04-12 21:53:51 +03:00
parent ec6fbef959
commit 564fbb6367
1 changed files with 29 additions and 5 deletions
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34
src/widgets/dropdown.cpp
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@@ -375,21 +375,45 @@ void ShowDropDownListAt(Window *w, const DropDownList *list, int selected, int b
int screen_bottom = GetMainViewBottom();
bool scroll = false;
enum { DISPLAY_BORDER = 20, TOP_BORDER = 4 };
/* Check if the dropdown will fully fit below the widget */
if (top + height + 4 >= screen_bottom) {
if (top + height + DISPLAY_BORDER >= screen_bottom) {
/* If not, check if it will fit above the widget */
if (w->top + wi_rect.top - height > GetMainViewTop()) {
top = w->top + wi_rect.top - height - 4;
int screen_top = GetMainViewTop();
if (w->top + wi_rect.top - TOP_BORDER > screen_top + height) {
top = w->top + wi_rect.top - height - TOP_BORDER;
} else {
/* If it doesn't fit above the widget, we need to enable a scrollbar... */
int avg_height = height / (int)list->Length();
scroll = true;
/* ... and choose whether to put the list above or below the widget. */
bool put_above = false;
int available_height = screen_bottom - w->top - wi_rect.bottom;
if (w->top + wi_rect.top - screen_top > available_height) {
// Put it above.
available_height = w->top + wi_rect.top - screen_top - DISPLAY_BORDER - TOP_BORDER;
put_above = true;
}
/* Check at least there is space for one item. */
assert(available_height >= avg_height);
/* ... and lastly if it won't, enable the scroll bar and fit the
* list in below the widget */
int avg_height = height / (int)list->Length();
int rows = (screen_bottom - 4 - top) / avg_height;
int rows = available_height / avg_height;
height = rows * avg_height;
scroll = true;
/* Add space for the scroll bar if we automatically determined
* the width of the list. */
max_item_width += NWidgetScrollbar::GetVerticalDimension().width;
/* ... and set the top position if needed. */
if (put_above) {
top = w->top + wi_rect.top - height - TOP_BORDER;
}
}
}