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(svn r20222) -Add: Add functions to compute the row in a scrolled widget.

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This commit is contained in:
alberth 2010-07-26 13:03:40 +00:00
parent 3a1451644a
commit 97f85f7bfb
2 changed files with 20 additions and 2 deletions
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18
src/window.cpp
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@ -86,17 +86,33 @@ WindowDesc::~WindowDesc()
* @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.
* @param line_height Height of a single row. A negative value means using the vertical resize step of the widget.
* @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 (line_height < 0) line_height = wid->resize_y;
if (clickpos < (int)wid->pos_y + padding) return INT_MAX;
return (clickpos - (int)wid->pos_y - padding) / line_height;
}
/**
* Compute the row of a scrolled widget that a user clicked in.
* @param clickpos Vertical position of the mouse click (without taking scrolling into account).
* @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. Default value is \c 0.
* @param line_height Height of a single row. A negative value means using the vertical resize step of the widget.
* @return Row number clicked at. If clicked at a wrong position, #INT_MAX is returned.
*/
int Scrollbar::GetScrolledRowFromWidget(int clickpos, const Window * const w, int widget, int padding, int line_height) const
{
uint pos = w->GetRowFromWidget(clickpos, widget, padding, line_height);
if (pos != INT_MAX) pos += this->GetPosition();
return (pos >= this->GetCount()) ? INT_MAX : pos;
}
/**
* Set capacity of visible elements from the size and resize properties of a widget.
* @param w Window.

4
src/window_gui.h
View File

@ -305,6 +305,8 @@ public:
this->SetPosition(position - this->GetCapacity() + 1);
}
}
int GetScrolledRowFromWidget(int clickpos, const Window * const w, int widget, int padding = 0, int line_height = -1) const;
};
/**
@ -528,7 +530,7 @@ public:
bool SetFocusedWidget(byte widget_index);
void HandleButtonClick(byte widget);
int GetRowFromWidget(int clickpos, int widget, int padding, int line_height) const;
int GetRowFromWidget(int clickpos, int widget, int padding, int line_height = -1) const;
void RaiseButtons(bool autoraise = false);
void CDECL SetWidgetsDisabledState(bool disab_stat, int widgets, ...);