GRAPH_DATA_HANDLE 在emwin中被哪个头文件包含
时间: 2023-08-16 12:05:08 浏览: 53
GRAPH_DATA_HANDLE 是在emWin的图形库中定义的一个数据类型,它通常是由 emWin 应用程序自定义的数据类型,用于存储图形库中的图形数据。
在 emWin 中,GRAPH_DATA_HANDLE 数据类型被包含在 GUI_Private.h 头文件中。该头文件是 emWin 图形库的私有头文件,通常不直接使用。如果需要使用 GRAPH_DATA_HANDLE 数据类型,可以通过包含 GUI.h 头文件来间接地包含 GUI_Private.h 头文件。例如:
```
#include "GUI.h"
GRAPH_DATA_HANDLE myGraphData;
```
这样就可以在应用程序中定义一个名为 myGraphData 的 GRAPH_DATA_HANDLE 类型的变量。
相关问题
不允许使用GRAPH_DATA_YT_Create和GRAPH_AttachData函数
好的,如果您不能使用GRAPH_DATA_YT_Create和GRAPH_AttachData函数,您可以使用下面的代码手动绘制波形图:
```c
uint32_t wave_data[100]; //存储波形图数据
int graph_x_start = 0; //波形图绘制的左边界位置
//在波形图上绘制一条新的数据线
void draw_new_wave_line(void)
{
//获取波形图控件句柄
GRAPH_Handle hGraph;
hGraph = WM_GetDialogItem(pMsg->hWin, GUI_ID_GRAPH0);
//创建一个新的绘图数据对象
GRAPH_DATA_Handle hData;
hData = GRAPH_DATA_XY_Create(GUI_RED, 100, NULL, 0);
//将新的数据线添加到波形图上
GRAPH_AttachData(hGraph, hData);
//更新波形图数据
for(int i = 0; i < 100; i++)
{
GRAPH_DATA_Y(hData, i) = wave_data[i];
GRAPH_DATA_X(hData, i) = graph_x_start + i;
}
//使波形图滚动到最新的数据位置
graph_x_start++;
GRAPH_SCROLL(hGraph, -1, 0);
}
```
然后,您需要定期更新波形图数据,例如:
```c
//从传感器读取波形图数据
for(int i = 0; i < 100; i++)
{
wave_data[i] = read_wave_data();
}
//绘制新的数据线
draw_new_wave_line();
```
以上是手动绘制波形图的示例代码,您可以根据自己的需求进行修改和优化。希望我的回答能对您有所帮助。
graph_from_data_frame
`graph_from_data_frame()` is a function in the `igraph` package in R that creates a graph object from a data frame. The data frame should contain two columns, representing the source and target nodes of each edge in the graph. The function can also take additional arguments to specify the type of graph to create (e.g. directed or undirected), the attribute names to use for edge weights, and the vertex labels.
Here's an example of how to use `graph_from_data_frame()`:
```r
library(igraph)
# create a data frame of edges
edges <- data.frame(
source = c("A", "B", "C", "D"),
target = c("B", "C", "D", "A")
)
# create an undirected graph from the data frame
g <- graph_from_data_frame(edges, directed = FALSE)
# plot the graph
plot(g, vertex.label.color = "red", vertex.size = 30)
```
This will create an undirected graph with four vertices labeled A, B, C, and D, and four edges connecting them in a cycle. The `plot()` function is used to visualize the graph, with vertex label color set to red and vertex size set to 30.
Note that the `graph_from_data_frame()` function can also take additional arguments to specify vertex attributes, edge attributes, and other properties of the graph. See the `igraph` documentation for more details.