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px4_autopilot/NxWidgets/libnxwidgets/include/cnxwidget.hxx

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/****************************************************************************
* include/cnxwidget.hxx
* NxWidgets/libnxwidgets/
*
* 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_CNXWIDGET_HXX
#define __INCLUDE_CNXWIDGET_HXX
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <ctime>
#include <nuttx/nx/nxglib.h>
#include "cnxstring.hxx"
#include "cnxfont.hxx"
#include "crect.hxx"
#include "cwidgetstyle.hxx"
#include "cwidgeteventargs.hxx"
#include "cwidgeteventhandler.hxx"
#include "cwidgeteventhandlerlist.hxx"
#include "tnxarray.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Implementation Classes
****************************************************************************/
#if defined(__cplusplus)
namespace NXWidgets
{
/**
* Forward references
*/
class CWidgetControl;
class CGraphicsPort;
class CNxFont;
class CWidgetEventHandlerList;
/**
* Class providing all the basic functionality of a NxWidget. All other
* widgets must must inherit from this class.
*/
class CNxWidget
{
public:
/**
* Enum listing flags that can be set in the constructor's "flags" parameter.
*/
enum WidgetFlagType
{
WIDGET_BORDERLESS = 0x0001, /**< Widget has no border */
WIDGET_DRAGGABLE = 0x0002, /**< Widget can be dragged by the user */
WIDGET_PERMEABLE = 0x0004, /**< Widget's children can exceed this widget's edges */
WIDGET_DOUBLE_CLICKABLE = 0x0008, /**< Widget can be double-clicked */
WIDGET_NO_RAISE_EVENTS = 0x0010, /**< Widget does not raise events */
};
/**
* Struct describing some basic properties of a widget.
*/
typedef struct
{
uint8_t clicked : 1; /**< True if the widget is currently clicked. */
uint8_t hasFocus : 1; /**< True if the widget has focus. */
uint8_t dragging : 1; /**< True if the widget is being dragged. */
uint8_t deleted : 1; /**< True if the widget has been deleted. */
uint8_t borderless : 1; /**< True if the widget is borderless. */
uint8_t draggable : 1; /**< True if the widget can be dragged. */
uint8_t drawingEnabled : 1; /**< True if the widget can be drawn. */
uint8_t enabled : 1; /**< True if the widget is enabled. */
uint8_t permeable : 1; /**< True if the widget's children can exceed its dimensions. */
uint8_t erased : 1; /**< True if the widget is currently erased from the frame buffer. */
uint8_t visibleRegionCacheInvalid : 1; /**< True if the region cache is invalid. */
uint8_t hidden : 1; /**< True if the widget is hidden. */
uint8_t doubleClickable : 1; /**< True if the widget can be double-clicked. */
} Flags;
/**
* Struct describing the size of all four borders of a widget.
*/
typedef struct
{
uint8_t top; /**< Height of the top border. */
uint8_t right; /**< Width of the right border. */
uint8_t bottom; /**< Height of the bottom border. */
uint8_t left; /**< Width of the left border. */
} WidgetBorderSize;
protected:
CWidgetControl *m_widgetControl; /**< The controlling widget for the display */
CRect m_rect; /**< Rectange bounding the widget. */
// Dragging variables
nxgl_coord_t m_grabPointX; /**< Physical space x coordinate where dragging began. */
nxgl_coord_t m_grabPointY; /**< Physical space y coordinate where dragging began. */
nxgl_coord_t m_newX; /**< Physical x coordinate where widget is being dragged to. */
nxgl_coord_t m_newY; /**< Physical y coordinate where widget is being dragged to. */
// Style
CWidgetStyle m_style; /**< All style information used by a widget. */
// Status
Flags m_flags; /**< Flags struct. */
// Event handling
CWidgetEventHandlerList *m_widgetEventHandlers; /**< List of event handlers. */
// Double-clicking
struct timespec m_lastClickTime; /**< System timer when last clicked. */
nxgl_coord_t m_lastClickX; /**< X coordinate of last click. */
nxgl_coord_t m_lastClickY; /**< Y coordinate of last click. */
int m_doubleClickBounds; /**< Area in which a click is assumed to be a double-click. */
// Hierarchy control
CNxWidget *m_parent; /**< Pointer to the widget's parent. */
CNxWidget *m_focusedChild; /**< Pointer to the child widget that has focus. */
TNxArray<CNxWidget*> m_children; /**< List of child widgets. */
// Borders
WidgetBorderSize m_borderSize; /**< Size of the widget borders. */
/**
* Use the provided widget style
*/
void useWidgetStyle(const CWidgetStyle *style);
/**
* 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 inline void drawContents(CGraphicsPort* port) { }
/**
* 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 drawBorder(CGraphicsPort* port) { }
/**
* Draw all visible regions of this widget's children.
*/
void drawChildren(void);
/**
* Erase and remove the supplied child widget from this widget and
* send it to the deletion queue.
*
* @param widget The widget to close.
* @see close().
*/
void closeChild(CNxWidget *widget);
/**
* Notify this widget that it is being dragged, and set its drag point.
*
* @param x The x coordinate of the drag position relative to this widget.
* @param y The y coordinate of the drag position relative to this widget.
*/
void startDragging(nxgl_coord_t x, nxgl_coord_t y);
/**
* Notify this widget that it is no longer being dragged.
*/
void stopDragging(nxgl_coord_t x, nxgl_coord_t y);
/**
* Copy constructor is protected to prevent usage.
*/
inline CNxWidget(const CNxWidget &widget) { }
/**
* Called when the widget is clicked. Override this when creating new
* widgets if the widget should exhibit additional behaviour when it is
* clicked.
*
* @param x The x coordinate of the click.
* @param y The y coordinate of the click.
*/
virtual inline void onClick(nxgl_coord_t x, nxgl_coord_t y) { }
/**
* Called when the widget is double-clicked. Override this when
* creating new widgets if the widget should exhibit additional
* behaviour when it is double-clicked. To change the conditions that
* apply in detecting a double-click, override the isDoubleClicked()
* method.
*
* @param x The x coordinate of the click.
* @param y The y coordinate of the click.
*/
virtual inline void onDoubleClick(nxgl_coord_t x, nxgl_coord_t y) { }
/**
* Called just before the widget is released; the widget will be in the
* clicked stated. Override this when creating new widgets if the
* widget should exhibit additional behaviour when it is released.
*
* @param x The x coordinate of the mouse when released.
* @param y The y coordinate of the mouse when released.
*/
virtual inline void onPreRelease(nxgl_coord_t x, nxgl_coord_t y) { }
/**
* Called just after the widget is released; the widget will be in the
* released stated. Override this when creating new widgets if the
* widget should exhibit additional behaviour when it is released.
*
* @param x The x coordinate of the mouse when released.
* @param y The y coordinate of the mouse when released.
*/
virtual inline void onRelease(nxgl_coord_t x, nxgl_coord_t y) { }
/**
* Called when the widget is released outside of its boundaries.
* Override this when creating new widgets if the widget should exhibit
* additional behaviour when it is released outside of its boundaries.
*
* @param x The x coordinate of the mouse when released.
* @param y The y coordinate of the mouse when released.
*/
virtual inline void onReleaseOutside(nxgl_coord_t x, nxgl_coord_t y) { }
/**
* Called when the widget is dragged. Override this when creating new
* widgets if the widget should exhibit additional behaviour when it is
* dragged.
*
* @param x The x coordinate of the mouse.
* @param y The y coordinate of the mouse.
* @param vX X distance dragged.
* @param vY Y distance dragged.
*/
virtual inline void onDrag(nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t vX, nxgl_coord_t vY) { }
/**
* Called when the widget starts being dragged. Override this when
* creating new widgets if the widget should exhibit additional
* behaviour when dragging starts.
*/
virtual inline void onDragStart(void) { }
/**
* Called when the widget stops being dragged. Override this when
* creating new widgets if the widget should exhibit additional
* behaviour when dragging stops.
*/
virtual inline void onDragStop(void) { }
/**
* Called when the widget gains focus. Override this when creating new
* widgets if the widget should exhibit additional behaviour when
* gaining focus.
*/
virtual inline void onFocus(void) { }
/**
* Called when the widget loses focus. Override this when creating new
* widgets if the widget should exhibit additional behaviour when
* losing focus.
*/
virtual inline void onBlur(void) { }
/**
* Called when the widget is enabled. Override this when creating new
* widgets if the widget should exhibit additional behaviour when
* enabled.
*/
virtual inline void onEnable(void) { }
/**
* Called when the widget is disabled. Override this when creating new
* widgets if the widget should exhibit additional behaviour when
* disabled.
*/
virtual inline void onDisable(void) { }
/**
* Called when the widget is resized. Override this when creating new
* widgets if the widget should exhibit additional behaviour when
* resized.
*
* @param width The new width.
* @param height The new height.
*/
virtual inline void onResize(nxgl_coord_t width, nxgl_coord_t height) { }
public:
/**
* CNxWidget constructor.
*
* @param pWidgetControl The controllwing widget 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 Bitmask specifying some set-up values for the widget.
* @param style The style that the button should use. If this is not
* specified, the button will use the global default widget
* style.
* @see WidgetFlagType.
*/
CNxWidget(CWidgetControl *pWidgetControl,
nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t width, nxgl_coord_t height,
uint32_t flags,
FAR const CWidgetStyle *style = (FAR const CWidgetStyle *)NULL);
/**
* Destructor.
*/
virtual ~CNxWidget(void);
/**
* Get the x coordinate of the widget in "Widget space".
*
* @return Widget space x coordinate.
*/
nxgl_coord_t getX(void) const;
/**
* Get the y coordinate of the widget in "Widget space".
*
* @return Widget space y coordinate.
*/
nxgl_coord_t getY(void) const;
/**
* Get the x coordinate of the widget relative to its parent.
*
* @return Parent-space x coordinate.
*/
nxgl_coord_t getRelativeX(void) const;
/**
* Get the y coordinate of the widget relative to its parent.
*
* @return Parent-space y coordinate.
*/
nxgl_coord_t getRelativeY(void) const;
/**
* Is the widget active?
* A value of true indicates that this widget has focus or is an ancestor
* of the widget with focus.
*
* @return True if active.
*/
inline bool hasFocus(void) const
{
return m_flags.hasFocus;
}
/**
* Has the widget been marked for deletion? This function recurses up the widget
* hierarchy and only returns true if all of the widgets in the ancestor
* chain are not deleted.
*
* Widgets marked for deletion are automatically deleted and should not be
* interacted with.
*
* @return True if marked for deletion.
*/
bool isDeleted(void) const;
/**
* Is the widget allowed to draw? This function recurses up the widget
* hierarchy and only returns true if all of the widgets in the ancestor
* chain are visible.
*
* @return True if drawing is enabled.
*/
bool isDrawingEnabled(void) const;
/**
* Is the widget hidden? This function recurses up the widget
* hierarchy and returns true if any of the widgets in the ancestor
* chain are hidden.
*
* @return True if hidden.
*/
bool isHidden(void) const;
/**
* Is the widget enabled? This function recurses up the widget
* hierarchy and only returns true if all of the widgets in the ancestor
* chain are enabled.
*
* @return True if enabled.
*/
bool isEnabled(void) const;
/**
* Are the widget's edges permeable or solid?
* Permeable widgets do not enforce their dimensions on the
* coordinates and dimensions of child widgets.
*
* @return True if permeable.
*/
inline bool isPermeable(void) const
{
return m_flags.permeable;
}
/**
* IS the widget double-clickable?
* @return True if the widget watches for double-clicks.
*/
inline bool isDoubleClickable(void) const
{
return m_flags.doubleClickable;
}
/**
* Does the widget have a border?
*
* @return True if the widget does not have a border.
*/
inline bool isBorderless(void) const
{
return m_flags.borderless;
}
/**
* Is the widget clicked?
*
* @return True if the widget is currently clicked.
*/
inline bool isClicked(void) const
{
return m_flags.clicked;
}
/**
* Is the widget being dragged?
*
* @return True if the widget is currently being dragged.
*/
inline bool isBeingDragged(void) const
{
return m_flags.dragging;
}
/**
* Get the width of the widget.
*
* @return The widget width.
*/
inline nxgl_coord_t getWidth(void) const
{
return m_rect.getWidth();
}
/**
* Get the height of the widget.
*
* @return The widget height.
*/
inline nxgl_coord_t getHeight(void) const
{
return m_rect.getHeight();
}
/**
* Get the size of the widget
*
* @return The widgets's size
*/
inline void getSize(struct nxgl_size_s &size) const
{
size.h = m_rect.getHeight();
size.w = m_rect.getWidth();
}
/**
* Get the position of the widget
*
* @return The widgets's position
*/
inline void getPos(struct nxgl_point_s &pos) const
{
pos.x = m_rect.getX();
pos.y = m_rect.getY();
}
/**
* Get the window bounding box in physical display coordinated.
*
* @return This function returns the window handle.
*/
inline CRect getBoundingBox(void)
{
return CRect(m_rect);
}
/**
* Get the dimensions of the border
*
*/
inline void getBorderSize(WidgetBorderSize &borderSize)
{
borderSize.top = m_borderSize.top;
borderSize.left = m_borderSize.left;
borderSize.bottom = m_borderSize.bottom;
borderSize.right = m_borderSize.right;
}
/**
* Get a pointer to this widget's parent.
*
* @return This widget's parent.
*/
inline CNxWidget *getParent(void) const
{
return m_parent;
}
/**
* Get a pointer to this widget's focused child.
*
* @return This widget's focused child.
*/
inline CNxWidget *getFocusedWidget(void)
{
return m_focusedChild;
}
/**
* Insert the dimensions that this widget wants to have into the rect
* passed in as a parameter. All coordinates are relative to the widget's
* parent.
*
* @param rect Reference to a rect to populate with data.
*/
virtual void getPreferredDimensions(CRect &rect) const;
/**
* Insert the properties of the space within this widget that is
* available for children into the rect passed in as a parameter.
* All coordinates are relative to this widget.
*
* @param rect Reference to a rect to populate with data.
*/
void getClientRect(CRect &rect) const;
/**
* Insert the properties of the space within this widget that is
* available for children into the rect passed in as a parameter.
* Identical to getClientRect() except that all coordinates are
* absolute positions within the window.
*
* @param rect Reference to a rect to populate with data.
*/
void getRect(CRect &rect) const;
/**
* Gets a pointer to the widget's font.
*
* @return A pointer to the widget's font.
*/
inline CNxFont *getFont(void) const
{
return m_style.font;
}
/**
* Gets the color used for the normal background fill.
*
* @return Background fill color.
*/
inline nxgl_mxpixel_t getBackgroundColor(void) const
{
return m_style.colors.background;
}
/**
* Gets the color used for the background fill when the widget is selected.
*
* @return Dark color.
*/
inline nxgl_mxpixel_t getSelectedBackgroundColor(void) const
{
return m_style.colors.selectedBackground;
}
/**
* Gets the color used as the light edge in bevelled boxes.
*
* @return Shine color.
*/
inline nxgl_mxpixel_t getShineEdgeColor(void) const
{
return m_style.colors.shineEdge;
}
/**
* Gets the color used as the dark edge in bevelled boxes.
*
* @return Shadow color.
*/
inline nxgl_mxpixel_t getShadowEdgeColor(void) const
{
return m_style.colors.shadowEdge;
}
/**
* Gets the color used as the fill in focused window borders.
*
* @return Highlight color.
*/
inline nxgl_mxpixel_t getHighlightColor(void) const
{
return m_style.colors.highlight;
}
/**
* Gets the color used for text in a disabled widget.
*
* @return Disabled text color.
*/
inline nxgl_mxpixel_t getDisabledTextColor(void) const
{
return m_style.colors.disabledText;
}
/**
* Gets the color used for text in a enabled widget.
*
* @return Enabled text color.
*/
inline nxgl_mxpixel_t getEnabledTextColor(void) const
{
return m_style.colors.enabledText;
}
/**
* Gets the color used for text in a clicked widget.
*
* @return Selected text color.
*/
inline nxgl_mxpixel_t getSelectedTextColor(void) const
{
return m_style.colors.selectedText;
}
/**
* Sets this widget's border state.
*
* @param isBorderless The border state.
*/
void setBorderless(bool isBorderless);
/**
* Sets whether or not this widget can be dragged.
*
* @param isDraggable The draggable state.
*/
inline void setDraggable(bool isDraggable)
{
m_flags.draggable = isDraggable;
}
/**
* Sets whether or not child widgets can exceed this widget's dimensions.
*
* @param permeable The permeable state.
*/
inline void setPermeable(bool permeable)
{
m_flags.permeable = permeable;
}
/**
* Sets whether or not the widgets processes double-clicks.
*
* @param doubleClickable The double-clickable state.
*/
inline void setDoubleClickable(bool doubleClickable)
{
m_flags.doubleClickable = doubleClickable;
}
/**
* Adds a widget event handler. The event handler will receive
* all events raised by this widget.
*
* @param eventHandler A pointer to the event handler.
*/
inline void addWidgetEventHandler(CWidgetEventHandler *eventHandler)
{
m_widgetEventHandlers->addWidgetEventHandler(eventHandler);
}
/**
* Remove a widget event handler.
*
* @param eventHandler A pointer to the event handler to remove.
*/
inline void removeWidgetEventHandler(CWidgetEventHandler* eventHandler)
{
m_widgetEventHandlers->removeWidgetEventHandler(eventHandler);
}
/**
* Enables or disables event firing for this widget.
*
* @param raises True to enable events, false to disable.
*/
inline void setRaisesEvents(bool raises)
{
raises ? m_widgetEventHandlers->enable() : m_widgetEventHandlers->disable();
}
/**
* Check if event handling is enabled for this widget.
*
* @return True is event handling is enabled.
*/
inline bool raisesEvents(void) const
{
return m_widgetEventHandlers->isEnabled();
}
/**
* Disabled drawing of this widget. Widgets hidden using this method will still
* be processed.
*/
inline void disableDrawing(void)
{
m_flags.drawingEnabled = false;
}
/**
* Enables drawing of this widget.
*/
inline void enableDrawing(void)
{
m_flags.drawingEnabled = true;
}
/**
* Sets the normal background color.
*
* @param color The new background color.
*/
inline void setBackgroundColor(nxgl_mxpixel_t color)
{
m_style.colors.background = color;
}
/**
* Sets the background color for a selected widget.
*
* @param color The new selected background color.
*/
inline void setSelectedBackgroundColor(nxgl_mxpixel_t color)
{
m_style.colors.selectedBackground = color;
}
/**
* Sets the shiny edge color.
*
* @param color The new shine edge color.
*/
inline void setShineEdgeColor(nxgl_mxpixel_t color)
{
m_style.colors.shineEdge = color;
}
/**
* Sets the shadow edge color.
*
* @param color The new shadow edge color.
*/
inline void setShadowEdgeColor(nxgl_mxpixel_t color)
{
m_style.colors.shadowEdge = color;
}
/**
* Sets the highlight color.
*
* @param color The new highlight color.
*/
inline void setHighlightColor(nxgl_mxpixel_t color)
{
m_style.colors.highlight = color;
}
/**
* Sets the text color to use when the widget is disabled.
*
* @param color The new text color.
*/
inline void setDisabledTextColor(nxgl_mxpixel_t color)
{
m_style.colors.disabledText = color;
}
/**
* Sets the text color to use when the widget is enabled.
*
* @param color The new text color.
*/
inline void setEnabledTextColor(nxgl_mxpixel_t color)
{
m_style.colors.enabledText = color;
}
/**
* Sets the text color to use when the widget is highlighted or clicked.
*
* @param color The new selected text color.
*/
inline void setSelectedTextColor(nxgl_mxpixel_t color)
{
m_style.colors.selectedText = color;
}
/**
* Sets the font.
*
* @param font A pointer to the font to use.
*/
virtual void setFont(CNxFont *font);
/**
* Draws the visible regions of the widget and the widget's child widgets.
*/
void redraw(void);
/**
* Enables the widget.
*
* @return True if the widget was enabled.
*/
bool enable(void);
/**
* Disabled the widget.
*
* @return True if the widget was disabled.
*/
bool disable(void);
/**
* Erases the widget, marks it as deleted, and moves it to the CNxWidget
* deletion queue. Widgets are automatically deleted by the framework and
* should not be deleted externally.
*/
void close(void);
/**
* Draws the widget and makes it visible.
* Does not steal focus from other widgets.
*
* @return True if the widget was shown.
* @see hide()
*/
bool show(void);
/**
* Erases the widget and makes it invisible.
* Does not re-assign focus to another widget.
*
* @return True if the widget was hidden.
* @see show()
*/
bool hide(void);
/**
* Click this widget at the supplied coordinates. This should only be
* overridden in subclasses if the default click behaviour needs to be changed.
* If the subclassed widget should just respond to a standard click,
* the onClick() method should be overridden instead.
*
* @param x X coordinate of the click.
* @param y Y coordinate of the click.
* @return True if the click was successful.
*/
bool click(nxgl_coord_t x, nxgl_coord_t y);
/**
* Check if the click is a double-click.
*
* @param x X coordinate of the click.
* @param y Y coordinate of the click.
* @return True if the click is a double-click.
*/
virtual bool isDoubleClick(nxgl_coord_t x, nxgl_coord_t y);
/**
* Double-click this widget at the supplied coordinates. This
* should only be overridden in subclasses if the default
* double-click behaviour needs to be changed. If the subclassed
* widget should just respond to a standard double-click, the
* onDoubleClick() method should be overridden instead.
*
* @param x X coordinate of the click.
* @param y Y coordinate of the click.
* @return True if the click was successful.
*/
bool doubleClick(nxgl_coord_t x, nxgl_coord_t y);
/**
* Release this widget at the supplied coordinates. This
* should only be overridden in subclasses if the default
* release behaviour needs to be changed. If the subclassed
* widget should just respond to a standard release, the
* onRelease() method should be overridden instead.
*
* @param x X coordinate of the release.
* @param y Y coordinate of the release.
* @return True if the release was successful.
*/
bool release(nxgl_coord_t x, nxgl_coord_t y);
/**
* Drag the widget to the supplied coordinates.
*
* @param x The x coordinate of the mouse.
* @param y The y coordinate of the mouse.
* @param vX The horizontal distance that the mouse was dragged.
* @param vY The vertical distance that the mouse was dragged.
* @return True if the drag was successful.
*/
bool drag(nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t vX, nxgl_coord_t vY);
/**
* Send a keypress to the widget.
*
* @param key The keycode to send to the widget.
* @return True if the keypress was processed.
*/
bool keyPress(nxwidget_char_t key);
/**
* Send a cursor control event to the widget.
*
* @param control The cursor control code to send to the widget.
* @return True if the cursor control was processed.
*/
bool cursorControl(ECursorControl control);
/**
* Give the widget focus.
*
* @return True if the widget received focus correctly.
*/
bool focus(void);
/**
* Remove focus from the widget.
*
* @return True if the widget lost focus correctly.
*/
bool blur(void);
/**
* Move the widget to the new coordinates.
* Co-ordinates are relative to the parent widget.
*
* @param x The new x coordinate.
* @param y The new y coordinate.
* @return True if the move was successful.
*/
bool moveTo(nxgl_coord_t x, nxgl_coord_t y);
/**
* Resize the widget to the new dimensions.
*
* @param width The new width.
* @param height The new height.
* @return True if the resize was successful.
*/
bool resize(nxgl_coord_t width, nxgl_coord_t height);
/**
* Resize and move the widget in one operation.
* Only performs one redraw so it is faster than calling the
* two separate functions.
*
* @param x The new x coordinate.
* @param y The new y coordinate.
* @param width The new width.
* @param height The new height.
* @return True if the widget was adjusted successfully.
*/
bool changeDimensions(nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t width, nxgl_coord_t height);
/**
* Moves the supplied child widget to the deletion queue.
* For framework use only.
*
* @param widget A pointer to the child widget.
*/
void moveChildToDeleteQueue(CNxWidget *widget);
/**
* Sets the supplied widget as the focused child. The widget must
* be a child of this widget.
*
* @param widget A pointer to the child widget.
* @see getFocusedWidget()
*/
void setFocusedWidget(CNxWidget *widget);
/**
* Checks if the supplied coordinates collide with this widget.
*
* @param x The x coordinate to check.
* @param y The y coordinate to check.
* @return True if a collision occurred.
*/
bool checkCollision(nxgl_coord_t x, nxgl_coord_t y) const;
/**
* Checks if the supplied rectangle definition collides with this widget.
*
* @param x The x coordinate of the rectangle to check.
* @param y The y coordinate of the rectangle to check.
* @param width The width of the rectangle to check.
* @param height The height of the rectangle to check.
* @return True if a collision occurred.
*/
bool checkCollision(nxgl_coord_t x, nxgl_coord_t y,
nxgl_coord_t width, nxgl_coord_t height) const;
/**
* Checks if the supplied widget collides with this widget.
*
* @param widget A pointer to another widget to check for collisions with.
* @return True if a collision occurred.
*/
bool checkCollision(CNxWidget *widget) const;
/**
* Adds a widget to this widget's child stack. The widget is added to the
* top of the stack. Note that the widget can only be added if it is not
* already a child of another widget.
*
* @param widget A pointer to the widget to add to the child list.
* @see insertWidget()
*/
void addWidget(CNxWidget *widget);
/**
* Inserts a widget into this widget's child stack at the bottom of the
* stack. Note that the widget can only be added if it is not already
* a child of another widget.
*
* @param widget A pointer to the widget to add to the child list.
* @see addWidget()
*/
void insertWidget(CNxWidget *widget);
/**
* Set the widget's parent to the widget passed in as a parameter.
* Called automatically when a widget is added as a child.
*
* @param parent A pointer to the parent widget.
*/
inline void setParent(CNxWidget *parent)
{
m_parent = parent;
}
/**
* Delete this widget. This should never be called in user code; widget
* deletion is handled internally.
*/
inline void destroy(void)
{
delete this;
}
/**
* Remove this widget from the widget hierarchy. Returns
* responsibility for deleting the widget back to the developer.
* Does not unregister the widget from the VBL system.
* Does not erase the widget from the display.
*
* @return True if the widget was successfully removed.
*/
bool remove(void);
/**
* Remove a child widget from the widget hierarchy. Returns
* responsibility for deleting the widget back to the developer.
* Does not unregister the widget from the VBL system.
* Does not erase the widget from the display.
*
* @param widget Pointer to the widget to remove from the hierarchy.
* @return True if the widget was succesfully removed.
*/
bool removeChild(CNxWidget *widget);
/**
* Get the child widget at the specified index.
*
* @param index Index of the child to retrieve.
* @return Pointer to the child at the specified index.
*/
const CNxWidget *getChild(int index) const;
/**
* Get the number of child widgets.
*
* @return The number of child widgets belonging to this widget.
*/
int getChildCount(void) const
{
return m_children.size();
}
/**
* Sets the border size. The border cannot be drawn over in the
* drawContents() method.
*
* @param borderSize The new border size.
*/
void setBorderSize(const WidgetBorderSize &borderSize);
};
}
#endif // __cplusplus
#endif // __INCLUDE_CNXWIDGET_HXX