wxWidgets/interface/gauge.h

/////////////////////////////////////////////////////////////////////////////
// Name:        gauge.h
// Purpose:     interface of wxGauge
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxGauge
    @wxheader{gauge.h}

    A gauge is a horizontal or vertical bar which shows a quantity (often time).

    wxGauge supports two working modes: determinate and indeterminate progress.

    The first is the usual working mode (see wxGauge::SetValue
    and wxGauge::SetRange) while the second can be used when
    the program is doing some processing but you don't know how much progress is
    being done.
    In this case, you can periodically call the wxGauge::Pulse
    function to make the progress bar switch to indeterminate mode (graphically
    it's usually a set of blocks which move or bounce in the bar control).

    wxGauge supports dynamic switch between these two work modes.

    There are no user commands for the gauge.

    @beginStyleTable
    @style{wxGA_HORIZONTAL}:
           Creates a horizontal gauge.
    @style{wxGA_VERTICAL}:
           Creates a vertical gauge.
    @style{wxGA_SMOOTH}:
           Creates smooth progress bar with one pixel wide update step (not
           supported by all platforms).
    @endStyleTable

    @library{wxcore}
    @category{ctrl}
    @appearance{gauge.png}

    @see wxSlider, wxScrollBar
*/
class wxGauge : public wxControl
{
public:
    //@{
    /**
        Constructor, creating and showing a gauge.
        
        @param parent
            Window parent.
        @param id
            Window identifier.
        @param range
            Integer range (maximum value) of the gauge. It is ignored when the gauge is
        used in indeterminate mode.
        @param pos
            Window position.
        @param size
            Window size.
        @param style
            Gauge style. See wxGauge.
        @param name
            Window name.
        
        @see Create()
    */
    wxGauge();
    wxGauge(wxWindow* parent, wxWindowID id, int range,
            const wxPoint& pos = wxDefaultPosition,
            const wxSize& size = wxDefaultSize,
            long style = wxGA_HORIZONTAL,
            const wxValidator& validator = wxDefaultValidator,
            const wxString& name = "gauge");
    //@}

    /**
        Destructor, destroying the gauge.
    */
    ~wxGauge();

    /**
        Creates the gauge for two-step construction. See wxGauge()
        for further details.
    */
    bool Create(wxWindow* parent, wxWindowID id, int range,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = wxGA_HORIZONTAL,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = "gauge");

    /**
        Returns the width of the 3D bezel face.
        
        @remarks This method is not implemented (returns 0) for most platforms.
        
        @see SetBezelFace()
    */
    int GetBezelFace() const;

    /**
        Returns the maximum position of the gauge.
        
        @see SetRange()
    */
    int GetRange() const;

    /**
        Returns the 3D shadow margin width.
        
        @remarks This method is not implemented (returns 0) for most platforms.
        
        @see SetShadowWidth()
    */
    int GetShadowWidth() const;

    /**
        Returns the current position of the gauge.
        
        @see SetValue()
    */
    int GetValue() const;

    /**
        Returns @true if the gauge is vertical (has @c wxGA_VERTICAL style) and
        @false otherwise.
    */
    bool IsVertical() const;

    /**
        Switch the gauge to indeterminate mode (if required) and makes the gauge move
        a bit to indicate the user that some progress has been made.
        Note that after calling this function the value returned by GetValue()
        is undefined and thus you need to explicitely call SetValue() if you
        want to restore the determinate mode.
    */
    void Pulse();

    /**
        Sets the 3D bezel face width.
        
        @remarks This method is not implemented (doesn't do anything) for most
                 platforms.
        
        @see GetBezelFace()
    */
    void SetBezelFace(int width);

    /**
        Sets the range (maximum value) of the gauge.
        This function makes the gauge switch to determinate mode, if it's not already.
        
        @see GetRange()
    */
    void SetRange(int range);

    /**
        Sets the 3D shadow width.
        
        @remarks This method is not implemented (doesn't do anything) for most
                 platforms.
    */
    void SetShadowWidth(int width);

    /**
        Sets the position of the gauge. The @a pos must be between 0 and the gauge
        range as returned by GetRange(), inclusive.
        This function makes the gauge switch to determinate mode, if it was in
        indeterminate mode before.
        
        @param pos
            Position for the gauge level.
        
        @see GetValue()
    */
    void SetValue(int pos);
};