macos 如何利用hidapi 实现在qt场景画板中划线
时间: 2023-11-27 07:55:43 浏览: 214
首先,你需要在你的macOS系统中安装hidapi库。你可以通过Homebrew来安装,打开终端并输入以下命令:
```
brew install hidapi
```
接下来,你需要将hidapi库链接到你的Qt项目中。你可以通过修改.pro文件来实现。在你的.pro文件中添加以下内容:
```
LIBS += -lhidapi
```
现在,你可以在Qt中使用hidapi库来读取USB设备数据。对于你的场景画板问题,你需要首先确定你的画板是否是一个USB设备,并且是否有一个HID接口可以用来读取它发送的数据。
如果你已经确认了这些信息,你可以使用hidapi函数来读取画板发送的数据。例如,你可以使用hid_read()函数来读取画板发送的数据,并将其解析为坐标点,然后在Qt场景画板中绘制线条。
下面是一些示例代码,可以帮助你开始:
```cpp
#include <hidapi/hidapi.h>
hid_device *handle;
unsigned char buf[64];
// Open the device using the VID, PID,
// and optionally the Serial number.
handle = hid_open(0x16c0, 0x27db, NULL);
if (!handle) {
// Error opening device
}
// Read data from the device
int res = hid_read(handle, buf, sizeof(buf));
if (res < 0) {
// Error reading from device
}
// Parse the data as coordinate points and draw lines in the Qt scene
```
需要注意的是,这只是一个简单的示例代码,你需要根据你的具体场景进行修改和适配。
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