frame.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2005 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef OUTPUT_UNICHROME_OSD_FRAME_H
#define OUTPUT_UNICHROME_OSD_FRAME_H
//------------------------------------------------------------------------------

#include "RoundedField.h"

#include "unichrome/PhysicalWindow.h"
#include "unichrome/UpdateableWindow.h"
#include "unichrome/Unichrome.h"

#include "sched/BasicTimeout.h"

//------------------------------------------------------------------------------

namespace unichrome {

class Font;

}

//------------------------------------------------------------------------------

namespace output { namespace unichrome { namespace osd {

//------------------------------------------------------------------------------

/**
 * This is a bordered frame used for OSD windows. Each frame has a
 * title
 */
class Frame : public ::unichrome::UpdateableWindow,
              public sched::BasicTimeout
{
public:
    /**
     * A frame configuration.
     */
    class Config
    {
    public:
        /**
         * The border color.
         */
        static const uint32_t borderColor = 0x005cb3ff;
        
        /**
         * The title color.
         */
        static const uint32_t titleColor = 0x00ffffff;
        
        /**
         * The border thickness.
         */
        static const size_t borderThickness = 5;

        /**
         * The corner radius
         */
        static const size_t cornerRadius = 13;
        
        /**
         * The margin before/after the title
         */
        static const size_t titleMargin = 8;

        /**
         * The margin above below the title.
         */
        static const size_t titleVerticalMargin = 2;
        
        /**
         * The unichrome device we are using.
         */
        ::unichrome::Unichrome& videoDevice;

        /**
         * The title font.
         */
        ::unichrome::Font& titleFont;

        /**
         * The alpha.
         */
        uint8_t alpha;

        /**
         * Construct the frame configuration.
         */
        Config(::unichrome::Unichrome& videoDevice,
               ::unichrome::Font& titleFont,
               uint8_t alpha = 0x80);
    };

private:
    /**
     * The window the frame should be displayed on.
     */
    ::unichrome::Window& displayWindow;

    /**
     * The position within the display window.
     */
    size_t displayX, displayY;

    /**
     * The memory block this frame belongs to.
     */
    ::unichrome::MemoryBlock* memoryBlock;

    /**
     * The physical window occupied by this frame.
     */
    ::unichrome::PhysicalWindow physicalWindow;

    /**
     * Indicate if the frame is visible or not.
     */
    bool visible;
    
protected:
    /**
     * The configuration.
     */
    const Config& config;
    
    /**
     * The inner window, i.e. the area that can be used to draw into
     * the frame
     */
    ::unichrome::LogicalWindow* innerWindow;

public:
    /**
     * Construct the frame with the given configuration.
     */
    Frame(const Config& config, ::unichrome::Window& displayWindow,
          size_t width, size_t height, const char* title,
          uint32_t bgColor);

    /**
     * Destroy the frame.
     */
    ~Frame();

    /**
     * Determine if the frame is visible or not.
     */
    bool isVisible() const;

    /**
     * Set the position of the frame. If visible, it will first be
     * hidden and the redisplayed.
     */
    void setDisplayPosition(size_t x, size_t y);

    /**
     * Get the X-coordinate of the display position
     */
    size_t getDisplayX() const;

    /**
     * Get the Y-coordinate of the display position
     */
    size_t getDisplayY() const;

    /**
     * Show the frame. If already visible, only the updated parts will
     * be displayed.
     */
    void show();

    /**
     * Hide the frame. If already visible, only the updated parts will
     * be displayed.
     */
    void hide();

private:
    /**
     * Perform the operation at a timeout. This is the change of the
     * visible state.
     */
    virtual void handleTimeout();

    /**
     * Draw the given border line.
     */
    void drawBorderLine(::unichrome::LogicalWindow& window,
                        const Config& config, bool horizontal, bool leftTop);

    /**
     * Draw the given corner.
     */
    void drawCorner(::unichrome::LogicalWindow& window,
                    const Config& config, bool top, bool left);

    /**
     * Draw the border into the given border window.
     */
    void drawBorder(::unichrome::LogicalWindow& window,
                    const Config& config);

    /**
     * Draw the title into the window.
     */
    void drawTitle(const Config& config, 
                   const Field::Config& titleFieldConfig,
                   const char* title);
    
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline bool Frame::isVisible() const
{
    return visible;
}

//------------------------------------------------------------------------------

inline size_t Frame::getDisplayX() const
{
    return displayX;
}

//------------------------------------------------------------------------------

inline size_t Frame::getDisplayY() const
{
    return displayY;
}

//------------------------------------------------------------------------------

} /* namespace output::unichrome::osd */ } /* namespace output::unichrome */ } /* namespace output */

//------------------------------------------------------------------------------
#endif // OUTPUT_UNICHROME_OSD_FRAME_H

// Local variables:
// mode: c++
// End: