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px4-firmware/NxWidgets/libnxwidgets/include/cscrollbarpanel.hxx

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/****************************************************************************
* NxWidgets/libnxwidgets/include/cscrollbarpanel.hxx
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
* me be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************
*
* Portions of this package derive from Woopsi (http://woopsi.org/) and
* portions are original efforts. It is difficult to determine at this
* point what parts are original efforts and which parts derive from Woopsi.
* However, in any event, the work of Antony Dzeryn will be acknowledged
* in most NxWidget files. Thanks Antony!
*
* Copyright (c) 2007-2011, Antony Dzeryn
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names "Woopsi", "Simian Zombie" nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Antony Dzeryn ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Antony Dzeryn BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_CSCROLLBARPANEL_HXX
#define __INCLUDE_CSCROLLBARPANEL_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <nuttx/nx/nxglib.h>
#include "cnxwidget.hxx"
#include "cscrollingpanel.hxx"
#include "cwidgetstyle.hxx"
#include "cscrollbarvertical.hxx"
#include "cscrollbarhorizontal.hxx"
#include "cwidgeteventhandler.hxx"
#include "iscrollable.hxx"
#include "cgraphicsport.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Implementation Classes
****************************************************************************/
#if defined(__cplusplus)
namespace NXWidgets
{
/**
* Class containing a scrolling panel bordered by scrollbars.
*/
class CScollbarPanel : public CNxWidget, public IScrollable,
public CWidgetEventHandler
{
protected:
CWidgetControl *m_widgetControl; /**< Widget control instance */
CScrollingPanel *m_panel; /**< Internal panel that
contains children. */
CScrollbarHorizontal *m_scrollbarHorizontal; /**< Horizontal scrollbar. */
CScrollbarVertical *m_scrollbarVertical; /**< Vertical scrollbar. */
uint8_t m_scrollbarWidth; /**< Width of the vertical
scrollbar. */
uint8_t m_scrollbarHeight; /**< Height of the horizontal
scrollbar. */
bool m_hasVerticalScrollbar; /**< Indicates the presence of
a vertical scrollbar. */
bool m_hasHorizontalScrollbar; /**< Indicates the presence of
a horizontal scrollbar. */
/**
* Creates the child widgets.
*/
void buildUI(void);
/**
* Draw the area of this widget that falls within the clipping region.
* Called by the redraw() function to draw all visible regions.
*
* @param port The CGraphicsPort to draw to.
* @see redraw()
*/
virtual void drawContents(CGraphicsPort *port);
/**
* Destructor.
*/
virtual ~CScollbarPanel(void) { }
/**
* Copy constructor is protected to prevent usage.
*/
inline CScollbarPanel(const CScollbarPanel &scrollbarPanel)
: CNxWidget(scrollbarPanel) { }
public:
/**
* Constructor.
*
* @param pWidgetControl The widget control for the display.
* @param x The x coordinate of the widget.
* @param y The y coordinate of the widget.
* @param width The width of the widget.
* @param height The height of the widget.
* @param flags The usual widget flags.
* @param style The style that the widget should use. If this is not
* specified, the widget will use the values stored in the global
* g_defaultWidgetStyle object. The widget will copy the properties of
* the style into its own internal style object.
*/
CScollbarPanel(CWidgetControl *pWidgetControl,
nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t width, nxgl_coord_t height,
uint32_t flags,
CWidgetStyle *style = (CWidgetStyle *)NULL);
/**
* Scroll the panel by the specified amounts.
*
* @param dx The horizontal distance to scroll.
* @param dy The vertical distance to scroll.
*/
virtual void scroll(int32_t dx, int32_t dy);
/**
* Reposition the panel's scrolling region to the specified coordinates.
*
* @param x The new x coordinate of the scrolling region.
* @param y The new y coordinate of the scrolling region.
*/
virtual void jump(int32_t x, int32_t y);
/**
* Set whether or not horizontal scrolling is allowed.
*
* @param allow True to allow horizontal scrolling; false to deny it.
*/
virtual void setAllowsVerticalScroll(bool allow);
/**
* Set whether or not horizontal scrolling is allowed.
*
* @param allow True to allow horizontal scrolling; false to deny it.
*/
virtual void setAllowsHorizontalScroll(bool allow);
/**
* Sets the width of the virtual canvas.
*
* @param width The width of the virtual canvas.
*/
virtual void setCanvasWidth(const int32_t width);
/**
* Sets the height of the virtual canvas.
*
* @param height The height of the virtual canvas.
*/
virtual void setCanvasHeight(const int32_t height);
/**
* Returns true if vertical scrolling is allowed.
*
* @return True if vertical scrolling is allowed.
*/
virtual bool allowsVerticalScroll(void) const;
/**
* Returns true if horizontal scrolling is allowed.
*
* @return True if horizontal scrolling is allowed.
*/
virtual bool allowsHorizontalScroll(void) const;
/**
* Gets the x coordinate of the virtual canvas.
*
* @return The x coordinate of the virtual canvas.
*/
virtual const int32_t getCanvasX(void) const;
/**
* Gets the y coordinate of the virtual canvas.
*
* @return The y coordinate of the virtual canvas.
*/
virtual const int32_t getCanvasY(void) const;
/**
* Gets the width of the virtual canvas.
*
* @return The width of the virtual canvas.
*/
virtual const int32_t getCanvasWidth(void) const;
/**
* Gets the height of the virtual canvas.
*
* @return The height of the virtual canvas.
*/
virtual const int32_t getCanvasHeight(void) const;
/**
* Handle a widget scroll event.
*
* @param e The event data.
*/
void handleScrollEvent(const CWidgetEventArgs &e);
/**
* Handle a widget value change event.
*
* @param e The event data.
*/
void handleValueChangeEvent(const CWidgetEventArgs &e);
/**
* Gets a pointer to the CScrollingPanel widget contained within
* this widget.
*
* @return A pointer to the CScrollingPanel widget.
*/
inline CScrollingPanel *getPanel(void)
{
return m_panel;
}
};
}
#endif // __cplusplus
#endif // __INCLUDE_CSCROLLBARPANEL_HXX
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