On Thu, Jun 14, 2007 at 02:26:57PM +0200, Leuven, E. wrote:
>
> i subclass qstyle to increase the height of the tear-off as follows:
>
> class MyStyle : public QStyle
> {
> public:
> MyStyle() {}
> int pixelMetric(PixelMetric metric, const QStyleOption * option = 0,
> const QWidget * widget = 0) const;
> };
>
>
> int MyStyle::pixelMetric(PixelMetric metric, const QStyleOption * option,
> const QWidget * widget) const
> {
> if (metric == QStyle::PM_MenuTearoffHeight)
> return 10;
> return QStyle::pixelMetric(metric, option, widget);
> }
>
>
> but i get a link error:
>
> 2>frontend_qt4.lib(QLToolbar.obj) : error LNK2019: unresolved external symbol
> "__declspec(dllimport) public: virtual int __thiscall
> QStyle::pixelMetric(enum QStyle::PixelMetric,class QStyleOption const *,class
> QWidget const *)const " ([EMAIL PROTECTED]@@[EMAIL
> PROTECTED]@PBVQStyleOption@@PBVQWidget@@@Z) referenced in function "public:
> virtual int __thiscall lyx::frontend::MyStyle::pixelMetric(enum
> QStyle::PixelMetric,class QStyleOption const *,class QWidget const *)const "
> ([EMAIL PROTECTED]@[EMAIL PROTECTED]@@[EMAIL
> PROTECTED]@@PBVQStyleOption@@PBVQWidget@@@Z)
> 2>C:\lyx\build-msvc\bin\Release\lyx-qt4.exe : fatal error LNK1120: 1
> unresolved externals
>
>
> someone knows what i am doing wrong?
Yes. QStyle::pixelMetric is pure virtual without implementation.
To do what you want you need to derive from a concrete style, which, of
course is not very practical since you do not know what style a user
uses.
I think the solution are style sheets but I've never used them myself.
Andre'
