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(svn r20221) -Codechange: Move unscrolled row calculation into a function.

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alberth
2010-07-26 13:02:28 +00:00
parent 80cc566553
commit 3a1451644a
4 changed files with 20 additions and 4 deletions
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16
src/window.cpp
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@@ -81,6 +81,22 @@ WindowDesc::~WindowDesc()
{
}
/**
* Compute the row of a widget that a user clicked in.
* @param clickpos Vertical position of the mouse click.
* @param widget Widget number of the widget clicked in.
* @param padding Amount of empty space between the widget edge and the top of the first row.
* @param line_height Height of a single row.
* @return Row number clicked at. If clicked at a wrong position, #INT_MAX is returned.
* @note The widget does not know where a list printed at the widget ends, so below a list is not a wrong position.
*/
int Window::GetRowFromWidget(int clickpos, int widget, int padding, int line_height) const
{
const NWidgetBase *wid = this->GetWidget<NWidgetBase>(widget);
if (clickpos < (int)wid->pos_y + padding) return INT_MAX;
return (clickpos - (int)wid->pos_y - padding) / line_height;
}
/**
* Set capacity of visible elements from the size and resize properties of a widget.
* @param w Window.