<commit_before>#ifndef RAZORPLUGIN_H
#define RAZORPLUGIN_H

#include "defs.h"

/**
 * @file razorplugin.h
 * @brief declares Razorplugin
 * @author Christopher "VdoP" Regali
 */

/**
 * @brief declares Razorplugin, a baseclass for all the plugins
 */

class RazorPlugin
{
public:
    RazorPlugin(int _bar)
    {
        Q_UNUSED(_bar);
    };
    /**
     * @brief this is called by Razorevent when x11 events get in and the derived class is registered!
     */
    virtual bool handleEvent(XEvent* _event)
    {
        Q_UNUSED(_event);
        return false;
    }
private:
    QWidget* gui;

};

#endif<commit_msg>initial API for plugins. No other changes in functionality yet<commit_after>#ifndef RAZORPLUGIN_H
#define RAZORPLUGIN_H

#include "defs.h"

class RazorPluginGUI;
class RazorBar;

/**
 * @file razorplugin.h
 * @brief declares Razorplugin
 * @author Christopher "VdoP" Regali
 */

/**
 * @brief declares Razorplugin, a baseclass for all the plugins
 * See RazorPluginGUI for RazorPlugin GUI implementation.
 */

class RazorPlugin
{
public:
    RazorPlugin(int _bar)
    {
        Q_UNUSED(_bar);
    };
    /**
     * @brief this is called by Razorevent when x11 events get in and the derived class is registered!
     */
    virtual bool handleEvent(XEvent* _event)
    {
        Q_UNUSED(_event);
        return false;
    }
private:
    RazorPluginGUI* gui;

};

/*! \brief Base abstract class for Razor panel widgets/plugins.
All plugins *must* be inherited from this one.

The main issues I want to solve are:
- horizontal or vertical panel
- task panel should take all space available

All plugins GUI will use one base class, the RazorPluginGUI.
This class provides some basic API and inherited/implemented
plugins GUIs will be responsible on the functionality itself.

Plugins will construct its content on this widget (painter
or subwidgets in layout, doesn't matter).

The panel will register plugins' sizeChanged() signal
with one global-size-recomputing slot to update required changes.

For better behavior handling there are arguments to provide
an access to Razor environment - see panel, parent.

For example, to correctly show the main menu, I need to know the
position of the panel (top, bottom, left, right) and panel size (height,
width). Parent not necessarily will be panel, say for quicklaunch
buttons parent may be some subpanel etc.

See also RazorPluginGUISquare, a helper class to provide square,
non-resizing plugin base.
*/
class RazorPluginGUI : public QWidget
{
    Q_OBJECT

public:
    /*! Hold the information how the widget should behave
    	in the panel resizing procedure.
    	Static = this widget will use size as is provided with
    			  widthForHeight() or heightForWidth() methods
    	Expanding = it means that the widget can grow and occupy
    				all free space (task panel for example);
    */
    enum RazorPluginSizing
    {
        Static,
        Expanding
    };

    RazorPluginGUI(const RazorBar* panel,
                   QWidget* parent=0,
                   Qt::WindowFlags f=0)
            : QWidget(parent)
    {
    }

    //! return the widget's width if is the panel horizontally layouted
    virtual int widthForHeight(int h) = 0;
    //! return the widget's height if is the panel vertically layouted
    virtual int heightForWidth(int w) = 0;
    //! return the resize behavior description
    virtual RazorPluginGUI::RazorPluginSizing sizePriority() = 0;

signals:
    /*! Plugin has to emit this signal in any case when it
    	changes its size.
    */
    void sizeChanged();
};

/*! A helper plugin GUI base class to simplify implementation
of square, non-expandable plugin/widget.
*/
class RazorPluginGUISquare : public RazorPluginGUI
{
    Q_OBJECT

public:
    RazorPluginGUISquare(const RazorBar* panel,
                         QWidget* parent=0,
                         Qt::WindowFlags f=0)
            : RazorPluginGUI(panel, parent, f)
    {
    }

    int widthForHeight(int h)
    {
        return h;
    }
    int heightForWidth(int w)
    {
        return w;
    }
    RazorPluginGUI::RazorPluginSizing sizePriority()
    {
        return RazorPluginGUI::Static;
    }
};


#endif
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