tool_bar_icon
tool_bar_icon(kIconGoPrevious), B_TRANSLATE("Previous file"));
fToolBar->AddAction(MSG_FILE_NEXT, this, tool_bar_icon(kIconGoNext),
tool_bar_icon(kIconMediaMovieLibrary), B_TRANSLATE("Slide show"));
tool_bar_icon(kIconDrawRectangularSelection),
tool_bar_icon(kIconZoomOriginal), B_TRANSLATE("Original size"), NULL,
tool_bar_icon(kIconZoomFitBest), B_TRANSLATE("Fit to window"));
fToolBar->AddAction(MSG_ZOOM_IN, this, tool_bar_icon(kIconZoomIn),
fToolBar->AddAction(MSG_ZOOM_OUT, this, tool_bar_icon(kIconZoomOut),
fToolBar->AddAction(MSG_PAGE_PREV, this, tool_bar_icon(kIconPagePrevious),
fToolBar->AddAction(MSG_PAGE_NEXT, this, tool_bar_icon(kIconPageNext),
tool_bar_icon(kIconViewWindowed), B_TRANSLATE("Leave full screen"));
const BBitmap* tool_bar_icon(uint32 which);