Method DisplayScaleChanged

Rtxpt/SampleUI.h:333–333

    virtual bool MousePosUpdate(double xpos, double ypos) override;
    virtual void DisplayScaleChanged(float scaleX, float scaleY) override { m_currentScale = scaleX; assert( scaleX == scaleY ); }
    virtual void Animate(float elapsedTimeSeconds) override;

    bool BuildUIScriptsAndEtc(void);