[brucelee]

Here's the code I used for that in CoolReader:

PHP Code:

bool systemPanelShown() {
    return GetPanelType()!=PANEL_DISABLED;
}
void hideSystemPanel(bool screenUpdate) {
    if( systemPanelShown() ) {
        CRLog::trace("hideSystemPanel(): PANEL_DISABLED");
        SetPanelType(PANEL_DISABLED);
        if( screenUpdate )
            CRPocketBookWindowManager::instance->update(true);
    }
}
void showSystemPanel(bool screenUpdate) {
    if( !systemPanelShown() ) {
        CRLog::trace("showSystemPanel(): PANEL_ENABLED");
        SetPanelType(PANEL_ENABLED);
        DrawPanel(NULL, "", "", 0);
        if( screenUpdate )
            PartialUpdate(0, 0, ScreenWidth(), ScreenHeight());
    }
}
void toggleSystemPanel(bool screenUpdate) {
    if( systemPanelShown() )
        hideSystemPanel(screenUpdate);
    else
        showSystemPanel(screenUpdate);
}
void toggleSystemPanel() {
    toggleSystemPanel(true);
}