我正在尝试使用UIAutomation构建自己的屏幕阅读器。我希望程序返回光标指向的元素的NameProperty
到目前为止,这是我所做的;无论如何,这只是示例代码:
#include <iostream>
#include <windows.h>
#include <UIAutomation.h>
const int MAX_WND_TEXT = 60;
IUIAutomation *automation = NULL;
BOOL InitializeUIAutomation(IUIAutomation **pAutomation)
{
CoInitialize(NULL);
HRESULT hr = CoCreateInstance(__uuidof(CUIAutomation), NULL,
CLSCTX_INPROC_SERVER,
__uuidof(IUIAutomation), (void**)pAutomation);
return (SUCCEEDED(hr));
}
int main()
{
POINT p;
IUIAutomationElement *elem;
wchar_t wndName[MAX_WND_TEXT];
BOOL stat = InitializeUIAutomation(&automation);
while (true)
{
if (stat)
{
GetCursorPos(&p);
HRESULT hr = automation->ElementFromPoint(p, &elem);
if (SUCCEEDED(hr))
{
HRESULT hr = elem->GetCurrentPropertyValue(UIA_NamePropertyId,
(VARIANT*)wndName);
if (SUCCEEDED(hr))
std::cout << wndName << std::endl;
else
wndName[0] = '\0';
}
else
std::cout << "No element selected." << std::endl;
Sleep(100);
elem->Release();
}
}
automation->Release();
CoUninitialize();
return 0;
}
现在的问题是我无法打印所需的值。该程序仅输出特定的十六进制数。而且我还是UIAutomation的初学者,所以我仍然迷路。
您能帮我还是给我一些解决问题的技巧?
最佳答案
使用此代码解决了我的问题。
#include <iostream>
#include <string>
#include <Windows.h>
#include <UIAutomation.h>
BOOL InitializeUIAutomation(IUIAutomation **automation)
{
CoInitialize(NULL);
HRESULT hr = CoCreateInstance(__uuidof(CUIAutomation), NULL,
CLSCTX_INPROC_SERVER, __uuidof(IUIAutomation),
(void**)automation);
return (SUCCEEDED(hr));
}
int main()
{
IUIAutomation *automation = NULL;
IUIAutomationElement *elem = NULL;
BOOL stat = InitializeUIAutomation(&automation);
POINT mousePt;
BSTR elemName = NULL;
if (stat)
{
while(true)
{
GetCursorPos(&mousePt);
HRESULT hr = automation->ElementFromPoint(mousePt, &elem);
if (SUCCEEDED(hr) && elem != NULL)
{
elem->get_CurrentName(&elemName);
std::wstring ws(elemName, SysStringLen(elemName));
std::wcout << ws << std::endl;
}
SysFreeString(elemName);
elem->Release();
Sleep(200);
}
}
automation->Release();
CoUninitialize();
return 0;
}
毕竟,打印的十六进制数字是BSTR header 。通过将BSTR转换为wstring解决我的问题。
关于c++ - 如何通过将光标悬停在UIAutomationElement的NamePropertyId上?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/54309909/