diff options
Diffstat (limited to 'src/gwin/graph.c')
| -rw-r--r-- | src/gwin/graph.c | 724 |
1 files changed, 362 insertions, 362 deletions
diff --git a/src/gwin/graph.c b/src/gwin/graph.c index 89876584..eff42eb1 100644 --- a/src/gwin/graph.c +++ b/src/gwin/graph.c @@ -1,362 +1,362 @@ -/*
- ChibiOS/GFX - Copyright (C) 2012, 2013
- Joel Bodenmann aka Tectu <joel@unormal.org>
-
- This file is part of ChibiOS/GFX.
-
- ChibiOS/GFX 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 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/GFX 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, see <http://www.gnu.org/licenses/>.
-*/
-/**
- * @file src/gwin/graph.c
- * @brief GWIN sub-system button code.
- *
- * @defgroup Graph Graph
- * @ingroup GWIN
- *
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-#include "gfx.h"
-
-#if (GFX_USE_GWIN && GWIN_NEED_GRAPH) || defined(__DOXYGEN__)
-
-#include "gwin/internal.h"
-
-#define GGRAPH_FLG_CONNECTPOINTS (GWIN_FIRST_CONTROL_FLAG<<0)
-#define GGRAPH_ARROW_SIZE 5
-
-static const GGraphStyle GGraphDefaultStyle = {
- { GGRAPH_POINT_DOT, 0, White }, // point
- { GGRAPH_LINE_DOT, 2, Gray }, // line
- { GGRAPH_LINE_SOLID, 0, White }, // x axis
- { GGRAPH_LINE_SOLID, 0, White }, // y axis
- { GGRAPH_LINE_NONE, 0, White, 0 }, // x grid
- { GGRAPH_LINE_NONE, 0, White, 0 }, // y grid
- GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS // flags
-};
-
-static void pointto(GGraphObject *gg, coord_t x, coord_t y, const GGraphPointStyle *style) {
- if (style->type == GGRAPH_POINT_NONE)
- return;
-
- // Convert to device space. Note the y-axis is inverted.
- x += gg->gwin.x + gg->xorigin;
- y = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y;
-
- if (style->size <= 1) {
- gdispDrawPixel(x, y, style->color);
- return;
- }
-
- switch(style->type) {
- case GGRAPH_POINT_SQUARE:
- gdispDrawBox(x-style->size, y-style->size, 2*style->size, 2*style->size, style->color);
- break;
-#if GDISP_NEED_CIRCLE
- case GGRAPH_POINT_CIRCLE:
- gdispDrawCircle(x, y, style->size, style->color);
- break;
-#endif
- case GGRAPH_POINT_DOT:
- default:
- gdispDrawPixel(x, y, style->color);
- break;
- }
-}
-
-static void lineto(GGraphObject *gg, coord_t x0, coord_t y0, coord_t x1, coord_t y1, const GGraphLineStyle *style) {
- coord_t dy, dx;
- coord_t addx, addy;
- coord_t P, diff, i;
- coord_t run_on, run_off, run;
-
- if (style->type == GGRAPH_LINE_NONE)
- return;
-
- // Convert to device space. Note the y-axis is inverted.
- x0 += gg->gwin.x + gg->xorigin;
- y0 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y0;
- x1 += gg->gwin.x + gg->xorigin;
- y1 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y1;
-
- if (style->size <= 0) {
- // Use the driver to draw a solid line
- gdispDrawLine(x0, y0, x1, y1, style->color);
- return;
- }
-
- switch (style->type) {
- case GGRAPH_LINE_DOT:
- run_on = 1;
- run_off = -style->size;
- break;
-
- case GGRAPH_LINE_DASH:
- run_on = style->size;
- run_off = -style->size;
- break;
-
- case GGRAPH_LINE_SOLID:
- default:
- // Use the driver to draw a solid line
- gdispDrawLine(x0, y0, x1, y1, style->color);
- return;
- }
-
- // Use Bresenham's algorithm modified to draw a stylized line
- run = 0;
- if (x1 >= x0) {
- dx = x1 - x0;
- addx = 1;
- } else {
- dx = x0 - x1;
- addx = -1;
- }
- if (y1 >= y0) {
- dy = y1 - y0;
- addy = 1;
- } else {
- dy = y0 - y1;
- addy = -1;
- }
-
- if (dx >= dy) {
- dy *= 2;
- P = dy - dx;
- diff = P - dx;
-
- for(i=0; i<=dx; ++i) {
- if (run++ >= 0) {
- if (run >= run_on)
- run = run_off;
- gdispDrawPixel(x0, y0, style->color);
- }
- if (P < 0) {
- P += dy;
- x0 += addx;
- } else {
- P += diff;
- x0 += addx;
- y0 += addy;
- }
- }
- } else {
- dx *= 2;
- P = dx - dy;
- diff = P - dy;
-
- for(i=0; i<=dy; ++i) {
- if (run++ >= 0) {
- if (run >= run_on)
- run = run_off;
- gdispDrawPixel(x0, y0, style->color);
- }
- if (P < 0) {
- P += dx;
- y0 += addy;
- } else {
- P += diff;
- x0 += addx;
- y0 += addy;
- }
- }
- }
-}
-
-GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height) {
- if (!(gg = (GGraphObject *)_gwinInit((GWindowObject *)gg, x, y, width, height, sizeof(GGraphObject))))
- return 0;
- gg->gwin.type = GW_GRAPH;
- gg->xorigin = gg->yorigin = 0;
- gg->lastx = gg->lasty = 0;
- gwinGraphSetStyle(&gg->gwin, &GGraphDefaultStyle);
- return (GHandle)gg;
-}
-
-void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle) {
- #define gg ((GGraphObject *)gh)
-
- if (gh->type != GW_GRAPH)
- return;
-
- gg->style.point.type = pstyle->point.type;
- gg->style.point.size = pstyle->point.size;
- gg->style.point.color = pstyle->point.color;
- gg->style.line.type = pstyle->line.type;
- gg->style.line.size = pstyle->line.size;
- gg->style.line.color = pstyle->line.color;
- gg->style.xaxis.type = pstyle->xaxis.type;
- gg->style.xaxis.size = pstyle->xaxis.size;
- gg->style.xaxis.color = pstyle->xaxis.color;
- gg->style.yaxis.type = pstyle->yaxis.type;
- gg->style.yaxis.size = pstyle->yaxis.size;
- gg->style.yaxis.color = pstyle->yaxis.color;
- gg->style.xgrid.type = pstyle->xgrid.type;
- gg->style.xgrid.size = pstyle->xgrid.size;
- gg->style.xgrid.color = pstyle->xgrid.color;
- gg->style.xgrid.spacing = pstyle->xgrid.spacing;
- gg->style.ygrid.type = pstyle->ygrid.type;
- gg->style.ygrid.size = pstyle->ygrid.size;
- gg->style.ygrid.color = pstyle->ygrid.color;
- gg->style.ygrid.spacing = pstyle->ygrid.spacing;
- gg->style.flags = pstyle->flags;
-
- #undef gg
-}
-
-void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y) {
- #define gg ((GGraphObject *)gh)
-
- if (gh->type != GW_GRAPH)
- return;
-
- gg->xorigin = x;
- gg->yorigin = y;
-
- #undef gg
-}
-
-void gwinGraphDrawAxis(GHandle gh) {
- #define gg ((GGraphObject *)gh)
- coord_t i, xmin, ymin, xmax, ymax;
-
- if (gh->type != GW_GRAPH)
- return;
-
- xmin = -gg->xorigin;
- xmax = gh->width-gg->xorigin-1;
- ymin = -gg->yorigin;
- ymax = gh->height-gg->yorigin-1;
-
- // x grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
- if (gg->style.xgrid.type != GGRAPH_LINE_NONE && gg->style.xgrid.spacing >= 2) {
- for(i = gg->style.xgrid.spacing; i <= xmax; i += gg->style.xgrid.spacing)
- lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
- for(i = -gg->style.xgrid.spacing; i >= xmin; i -= gg->style.xgrid.spacing)
- lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid);
- }
-
- // y grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle
- if (gg->style.ygrid.type != GGRAPH_LINE_NONE && gg->style.ygrid.spacing >= 2) {
- for(i = gg->style.ygrid.spacing; i <= ymax; i += gg->style.ygrid.spacing)
- lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
- for(i = -gg->style.ygrid.spacing; i >= ymin; i -= gg->style.ygrid.spacing)
- lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid);
- }
-
- // x axis
- lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis);
- if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)) {
- if (xmin > 0 || xmin < -(GGRAPH_ARROW_SIZE+1)) {
- lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
- lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
- }
- }
- if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS)) {
- if (xmax < 0 || xmax > (GGRAPH_ARROW_SIZE+1)) {
- lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis);
- lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis);
- }
- }
-
- // y axis
- lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis);
- if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)) {
- if (ymin > 0 || ymin < -(GGRAPH_ARROW_SIZE+1)) {
- lineto(gg, 0, ymin, GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
- lineto(gg, 0, ymin, -GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis);
- }
- }
- if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)) {
- if (ymax < 0 || ymax > (GGRAPH_ARROW_SIZE+1)) {
- lineto(gg, 0, ymax, GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
- lineto(gg, 0, ymax, -GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis);
- }
- }
-
- #undef gg
-}
-
-void gwinGraphStartSet(GHandle gh) {
- if (gh->type != GW_GRAPH)
- return;
-
- gh->flags &= ~GGRAPH_FLG_CONNECTPOINTS;
-}
-
-void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y) {
- #define gg ((GGraphObject *)gh)
-
- if (gh->type != GW_GRAPH)
- return;
-
- if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
- // Draw the line
- lineto(gg, gg->lastx, gg->lasty, x, y, &gg->style.line);
-
- // Redraw the previous point because the line may have overwritten it
- pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
-
- } else
- gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
-
- // Save this point for next time.
- gg->lastx = x;
- gg->lasty = y;
-
- // Draw this point.
- pointto(gg, x, y, &gg->style.point);
-
- #undef gg
-}
-
-void gwinGraphDrawPoints(GHandle gh, const GGraphPoint *points, unsigned count) {
- #define gg ((GGraphObject *)gh)
- unsigned i;
- const GGraphPoint *p;
-
- if (gh->type != GW_GRAPH)
- return;
-
- // Draw the connecting lines
- for(p = points, i = 0; i < count; p++, i++) {
- if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) {
- // Draw the line
- lineto(gg, gg->lastx, gg->lasty, p->x, p->y, &gg->style.line);
-
- // Redraw the previous point because the line may have overwritten it
- if (i == 0)
- pointto(gg, gg->lastx, gg->lasty, &gg->style.point);
-
- } else
- gh->flags |= GGRAPH_FLG_CONNECTPOINTS;
-
- // Save this point for next time.
- gg->lastx = p->x;
- gg->lasty = p->y;
- }
-
-
- // Draw the points.
- for(p = points, i = 0; i < count; p++, i++)
- pointto(gg, p->x, p->y, &gg->style.point);
-
- #undef gg
-}
-
-#endif /* GFX_USE_GWIN && GWIN_NEED_GRAPH */
-/** @} */
-
+/* + ChibiOS/GFX - Copyright (C) 2012, 2013 + Joel Bodenmann aka Tectu <joel@unormal.org> + + This file is part of ChibiOS/GFX. + + ChibiOS/GFX 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 3 of the License, or + (at your option) any later version. + + ChibiOS/GFX 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, see <http://www.gnu.org/licenses/>. +*/ +/** + * @file src/gwin/graph.c + * @brief GWIN sub-system button code. + * + * @defgroup Graph Graph + * @ingroup GWIN + * + * @{ + */ + +#include "ch.h" +#include "hal.h" +#include "gfx.h" + +#if (GFX_USE_GWIN && GWIN_NEED_GRAPH) || defined(__DOXYGEN__) + +#include "gwin/internal.h" + +#define GGRAPH_FLG_CONNECTPOINTS (GWIN_FIRST_CONTROL_FLAG<<0) +#define GGRAPH_ARROW_SIZE 5 + +static const GGraphStyle GGraphDefaultStyle = { + { GGRAPH_POINT_DOT, 0, White }, // point + { GGRAPH_LINE_DOT, 2, Gray }, // line + { GGRAPH_LINE_SOLID, 0, White }, // x axis + { GGRAPH_LINE_SOLID, 0, White }, // y axis + { GGRAPH_LINE_NONE, 0, White, 0 }, // x grid + { GGRAPH_LINE_NONE, 0, White, 0 }, // y grid + GWIN_GRAPH_STYLE_XAXIS_ARROWS|GWIN_GRAPH_STYLE_YAXIS_ARROWS // flags +}; + +static void pointto(GGraphObject *gg, coord_t x, coord_t y, const GGraphPointStyle *style) { + if (style->type == GGRAPH_POINT_NONE) + return; + + // Convert to device space. Note the y-axis is inverted. + x += gg->gwin.x + gg->xorigin; + y = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y; + + if (style->size <= 1) { + gdispDrawPixel(x, y, style->color); + return; + } + + switch(style->type) { + case GGRAPH_POINT_SQUARE: + gdispDrawBox(x-style->size, y-style->size, 2*style->size, 2*style->size, style->color); + break; +#if GDISP_NEED_CIRCLE + case GGRAPH_POINT_CIRCLE: + gdispDrawCircle(x, y, style->size, style->color); + break; +#endif + case GGRAPH_POINT_DOT: + default: + gdispDrawPixel(x, y, style->color); + break; + } +} + +static void lineto(GGraphObject *gg, coord_t x0, coord_t y0, coord_t x1, coord_t y1, const GGraphLineStyle *style) { + coord_t dy, dx; + coord_t addx, addy; + coord_t P, diff, i; + coord_t run_on, run_off, run; + + if (style->type == GGRAPH_LINE_NONE) + return; + + // Convert to device space. Note the y-axis is inverted. + x0 += gg->gwin.x + gg->xorigin; + y0 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y0; + x1 += gg->gwin.x + gg->xorigin; + y1 = gg->gwin.y + gg->gwin.height - 1 - gg->yorigin - y1; + + if (style->size <= 0) { + // Use the driver to draw a solid line + gdispDrawLine(x0, y0, x1, y1, style->color); + return; + } + + switch (style->type) { + case GGRAPH_LINE_DOT: + run_on = 1; + run_off = -style->size; + break; + + case GGRAPH_LINE_DASH: + run_on = style->size; + run_off = -style->size; + break; + + case GGRAPH_LINE_SOLID: + default: + // Use the driver to draw a solid line + gdispDrawLine(x0, y0, x1, y1, style->color); + return; + } + + // Use Bresenham's algorithm modified to draw a stylized line + run = 0; + if (x1 >= x0) { + dx = x1 - x0; + addx = 1; + } else { + dx = x0 - x1; + addx = -1; + } + if (y1 >= y0) { + dy = y1 - y0; + addy = 1; + } else { + dy = y0 - y1; + addy = -1; + } + + if (dx >= dy) { + dy *= 2; + P = dy - dx; + diff = P - dx; + + for(i=0; i<=dx; ++i) { + if (run++ >= 0) { + if (run >= run_on) + run = run_off; + gdispDrawPixel(x0, y0, style->color); + } + if (P < 0) { + P += dy; + x0 += addx; + } else { + P += diff; + x0 += addx; + y0 += addy; + } + } + } else { + dx *= 2; + P = dx - dy; + diff = P - dy; + + for(i=0; i<=dy; ++i) { + if (run++ >= 0) { + if (run >= run_on) + run = run_off; + gdispDrawPixel(x0, y0, style->color); + } + if (P < 0) { + P += dx; + y0 += addy; + } else { + P += diff; + x0 += addx; + y0 += addy; + } + } + } +} + +GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height) { + if (!(gg = (GGraphObject *)_gwinInit((GWindowObject *)gg, x, y, width, height, sizeof(GGraphObject)))) + return 0; + gg->gwin.type = GW_GRAPH; + gg->xorigin = gg->yorigin = 0; + gg->lastx = gg->lasty = 0; + gwinGraphSetStyle(&gg->gwin, &GGraphDefaultStyle); + return (GHandle)gg; +} + +void gwinGraphSetStyle(GHandle gh, const GGraphStyle *pstyle) { + #define gg ((GGraphObject *)gh) + + if (gh->type != GW_GRAPH) + return; + + gg->style.point.type = pstyle->point.type; + gg->style.point.size = pstyle->point.size; + gg->style.point.color = pstyle->point.color; + gg->style.line.type = pstyle->line.type; + gg->style.line.size = pstyle->line.size; + gg->style.line.color = pstyle->line.color; + gg->style.xaxis.type = pstyle->xaxis.type; + gg->style.xaxis.size = pstyle->xaxis.size; + gg->style.xaxis.color = pstyle->xaxis.color; + gg->style.yaxis.type = pstyle->yaxis.type; + gg->style.yaxis.size = pstyle->yaxis.size; + gg->style.yaxis.color = pstyle->yaxis.color; + gg->style.xgrid.type = pstyle->xgrid.type; + gg->style.xgrid.size = pstyle->xgrid.size; + gg->style.xgrid.color = pstyle->xgrid.color; + gg->style.xgrid.spacing = pstyle->xgrid.spacing; + gg->style.ygrid.type = pstyle->ygrid.type; + gg->style.ygrid.size = pstyle->ygrid.size; + gg->style.ygrid.color = pstyle->ygrid.color; + gg->style.ygrid.spacing = pstyle->ygrid.spacing; + gg->style.flags = pstyle->flags; + + #undef gg +} + +void gwinGraphSetOrigin(GHandle gh, coord_t x, coord_t y) { + #define gg ((GGraphObject *)gh) + + if (gh->type != GW_GRAPH) + return; + + gg->xorigin = x; + gg->yorigin = y; + + #undef gg +} + +void gwinGraphDrawAxis(GHandle gh) { + #define gg ((GGraphObject *)gh) + coord_t i, xmin, ymin, xmax, ymax; + + if (gh->type != GW_GRAPH) + return; + + xmin = -gg->xorigin; + xmax = gh->width-gg->xorigin-1; + ymin = -gg->yorigin; + ymax = gh->height-gg->yorigin-1; + + // x grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle + if (gg->style.xgrid.type != GGRAPH_LINE_NONE && gg->style.xgrid.spacing >= 2) { + for(i = gg->style.xgrid.spacing; i <= xmax; i += gg->style.xgrid.spacing) + lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid); + for(i = -gg->style.xgrid.spacing; i >= xmin; i -= gg->style.xgrid.spacing) + lineto(gg, i, ymin, i, ymax, (GGraphLineStyle *)&gg->style.xgrid); + } + + // y grid - this code assumes that the GGraphGridStyle is a superset of GGraphListStyle + if (gg->style.ygrid.type != GGRAPH_LINE_NONE && gg->style.ygrid.spacing >= 2) { + for(i = gg->style.ygrid.spacing; i <= ymax; i += gg->style.ygrid.spacing) + lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid); + for(i = -gg->style.ygrid.spacing; i >= ymin; i -= gg->style.ygrid.spacing) + lineto(gg, xmin, i, xmax, i, (GGraphLineStyle *)&gg->style.ygrid); + } + + // x axis + lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis); + if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_NEGATIVE_ARROWS)) { + if (xmin > 0 || xmin < -(GGRAPH_ARROW_SIZE+1)) { + lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis); + lineto(gg, xmin, 0, xmin+GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis); + } + } + if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_POSITIVE_ARROWS)) { + if (xmax < 0 || xmax > (GGRAPH_ARROW_SIZE+1)) { + lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, GGRAPH_ARROW_SIZE, &gg->style.xaxis); + lineto(gg, xmax, 0, xmax-GGRAPH_ARROW_SIZE, -GGRAPH_ARROW_SIZE, &gg->style.xaxis); + } + } + + // y axis + lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis); + if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_NEGATIVE_ARROWS)) { + if (ymin > 0 || ymin < -(GGRAPH_ARROW_SIZE+1)) { + lineto(gg, 0, ymin, GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis); + lineto(gg, 0, ymin, -GGRAPH_ARROW_SIZE, ymin+GGRAPH_ARROW_SIZE, &gg->style.yaxis); + } + } + if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_POSITIVE_ARROWS)) { + if (ymax < 0 || ymax > (GGRAPH_ARROW_SIZE+1)) { + lineto(gg, 0, ymax, GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis); + lineto(gg, 0, ymax, -GGRAPH_ARROW_SIZE, ymax-GGRAPH_ARROW_SIZE, &gg->style.yaxis); + } + } + + #undef gg +} + +void gwinGraphStartSet(GHandle gh) { + if (gh->type != GW_GRAPH) + return; + + gh->flags &= ~GGRAPH_FLG_CONNECTPOINTS; +} + +void gwinGraphDrawPoint(GHandle gh, coord_t x, coord_t y) { + #define gg ((GGraphObject *)gh) + + if (gh->type != GW_GRAPH) + return; + + if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) { + // Draw the line + lineto(gg, gg->lastx, gg->lasty, x, y, &gg->style.line); + + // Redraw the previous point because the line may have overwritten it + pointto(gg, gg->lastx, gg->lasty, &gg->style.point); + + } else + gh->flags |= GGRAPH_FLG_CONNECTPOINTS; + + // Save this point for next time. + gg->lastx = x; + gg->lasty = y; + + // Draw this point. + pointto(gg, x, y, &gg->style.point); + + #undef gg +} + +void gwinGraphDrawPoints(GHandle gh, const point *points, unsigned count) { + #define gg ((GGraphObject *)gh) + unsigned i; + const point *p; + + if (gh->type != GW_GRAPH) + return; + + // Draw the connecting lines + for(p = points, i = 0; i < count; p++, i++) { + if ((gh->flags & GGRAPH_FLG_CONNECTPOINTS)) { + // Draw the line + lineto(gg, gg->lastx, gg->lasty, p->x, p->y, &gg->style.line); + + // Redraw the previous point because the line may have overwritten it + if (i == 0) + pointto(gg, gg->lastx, gg->lasty, &gg->style.point); + + } else + gh->flags |= GGRAPH_FLG_CONNECTPOINTS; + + // Save this point for next time. + gg->lastx = p->x; + gg->lasty = p->y; + } + + + // Draw the points. + for(p = points, i = 0; i < count; p++, i++) + pointto(gg, p->x, p->y, &gg->style.point); + + #undef gg +} + +#endif /* GFX_USE_GWIN && GWIN_NEED_GRAPH */ +/** @} */ + |