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Add grids to graph demo and update graph arrows

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Add grid lines to graph demo.
Update graph arrows to allow seperate control of positive and negative
axis arrowheads.
This commit is contained in:
Andrew Hannam 2012-12-13 22:33:05 +10:00
parent d503f3a4ac
commit 311c0e7168
3 changed files with 21 additions and 10 deletions
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12
demos/modules/graph/main.c
View File

@ -18,9 +18,9 @@ GGraphStyle GraphStyle1 = {
{ GGRAPH_LINE_NONE, 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
{ GGRAPH_LINE_DASH, 5, Gray, 50 }, // x grid
{ GGRAPH_LINE_DOT, 7, Yellow, 50 }, // y grid
GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS // flags
};
GGraphStyle GraphStyle2 = {
@ -28,9 +28,9 @@ GGraphStyle GraphStyle2 = {
{ GGRAPH_LINE_NONE, 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
{ GGRAPH_LINE_DASH, 5, Gray, 50 }, // x grid
{ GGRAPH_LINE_DOT, 7, Yellow, 50 }, // y grid
GWIN_GRAPH_STYLE_POSITIVE_AXIS_ARROWS // flags
};
int main(void) {

11
include/gwin/graph.h
View File

@ -80,8 +80,15 @@ typedef struct GGraphStyle_t {
GGraphGridStyle xgrid;
GGraphGridStyle ygrid;
uint16_t flags;
#define GWIN_GRAPH_STYLE_XAXIS_ARROWS 0x0001
#define GWIN_GRAPH_STYLE_YAXIS_ARROWS 0x0002
#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

8
src/gwin/graph.c
View File

@ -299,11 +299,13 @@ void gwinGraphDrawAxis(GHandle gh) {
// x axis
lineto(gg, xmin, 0, xmax, 0, &gg->style.xaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_XAXIS_ARROWS)) {
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);
@ -312,11 +314,13 @@ void gwinGraphDrawAxis(GHandle gh) {
// y axis
lineto(gg, 0, ymin, 0, ymax, &gg->style.yaxis);
if ((gg->style.flags & GWIN_GRAPH_STYLE_YAXIS_ARROWS)) {
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);