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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gwin/gwin_graph.h
* @brief GWIN GRAPH module header file
*
* @defgroup Graph Graph
* @ingroup Windows
*
* @brief Graph window. Used to display highly customizable graphs.
*
* @details GWIN allows it to easily draw graphs.
*
* @pre GFX_USE_GWIN must be set to GFXON in your gfxconf.h
* @pre GWIN_NEED_GRAPH must be set to GFXON in your gfxconf.h
*
* @{
*/
#ifndef _GWIN_GRAPH_H
#define _GWIN_GRAPH_H
/* This file is included within "src/gwin/gwin.h" */
typedef enum GGraphPointType_e {
GGRAPH_POINT_NONE, GGRAPH_POINT_DOT, GGRAPH_POINT_SQUARE, GGRAPH_POINT_CIRCLE
} GGraphPointType;
typedef struct GGraphPointStyle_t {
GGraphPointType type;
gCoord size;
gColor color;
} GGraphPointStyle;
typedef enum GGraphLineType_e {
GGRAPH_LINE_NONE, GGRAPH_LINE_SOLID, GGRAPH_LINE_DOT, GGRAPH_LINE_DASH
} GGraphLineType;
typedef struct GGraphLineStyle_t {
GGraphLineType type;
gCoord size;
gColor color;
} GGraphLineStyle;
typedef struct GGraphGridStyle_t {
GGraphLineType type;
gCoord size;
gColor color;
gCoord spacing;
} GGraphGridStyle;
typedef struct GGraphStyle_t {
GGraphPointStyle point;
GGraphLineStyle line;
GGraphLineStyle xaxis;
GGraphLineStyle yaxis;
GGraphGridStyle xgrid;
GGraphGridStyle ygrid;
uint16_t flags;
#define GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS 0x0001
#define GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS 0x0002
#define GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS 0x0004
#define GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS 0x0008
#define GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)
#define GWIN_GRAPH_STYLE_NEGATIVE_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_XAXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_YAXIS_ARROWS (GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS|GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)
#define GWIN_GRAPH_STYLE_ALL_AXIS_ARROWS (GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS)
} GGraphStyle;
// A graph window
typedef struct GGraphObject {
GWindowObject g;
GGraphStyle style;
gCoord xorigin, yorigin;
gCoord lastx, lasty;
} GGraphObject;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
/**
* @brief Create a graph window.
* @return NULL if there is no resultant drawing area, otherwise a window handle.
*
* @param[in] g The GDisplay to display this window on
* @param[in] gg The GGraphObject structure to initialise. If this is NULL the structure is dynamically allocated.
* @param[in] pInit The initialization parameters to use
*
* @note The drawing color and the background color get set to the current defaults. If you haven't called
* @p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are GFX_WHITE and GFX_BLACK respectively.
* @note The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
* is no default font and text drawing operations will no nothing.
* @note The dimensions and position may be changed to fit on the real screen.
* @note A graph does not save the drawing state. It is not automatically redrawn if the window is moved or
* its visibility state is changed.
* @note The coordinate system within the window for graphing operations (but not for any other drawing
* operation) is relative to the bottom left corner and then shifted right and up by the specified
* graphing x and y origin. Note that this system is inverted in the y direction relative to the display.
* This gives the best graphing arrangement ie. increasing y values are closer to the top of the display.
*
* @api
*/
GHandle gwinGGraphCreate(GDisplay *g, GGraphObject *gg, const GWindowInit *pInit);
#define gwinGraphCreate(gg, pInit) gwinGGraphCreate(GDISP, gg, pInit)
/**
* @brief Set the style of the graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] pstyle The graph style to set.
* @note The graph is not automatically redrawn. The new style will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle);
/**
* @brief Set the origin for graphing operations.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new origin for the graph (in graph coordinates relative to the bottom left corner).
* @note The graph is not automatically redrawn. The new origin will apply to any new drawing operations.
*
* @api
*/
void gwinGraphSetOrigin(GHandle gh, gCoord x, gCoord y);
/**
* @brief Draw the axis and the background grid.
*
* @param[in] gh The window handle (must be a graph window)
* @note The graph is not automatically cleared. You must do that first by calling gwinClear().
*
* @api
*/
void gwinGraphDrawAxis(GHandle gh);
/**
* @brief Start a new set of graphing data.
* @details This prevents a line being drawn from the last data point to the next point to be drawn.
*
* @param[in] gh The window handle (must be a graph window)
*
* @api
*/
void gwinGraphStartSet(GHandle gh);
/**
* @brief Draw a graph point.
* @details A graph point and a line connecting to the previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] x, y The new point for the graph.
*
* @api
*/
void gwinGraphDrawPoint(GHandle gh, gCoord x, gCoord y);
/**
* @brief Draw multiple graph points.
* @details A graph point and a line connecting to each previous point will be drawn.
*
* @param[in] gh The window handle (must be a graph window)
* @param[in] points The array of points for the graph.
* @param[in] count The number of points in the array.
* @note This is slightly more efficient than calling gwinGraphDrawPoint() repeatedly.
*
* @api
*/
void gwinGraphDrawPoints(GHandle gh, const gPoint *points, unsigned count);
#endif /* _GWIN_GRAPH_H */
/** @} */
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