I create an algorithm that copies some data from one file and pastes it into the program.
To copy this data I use this:
keybd_event (VK_CONTROL, 0, KEYEVENTF_EXTENDEDKEY, 0);
sleep (500);
keybd_event (VK_CONTROL, 0, KEYEVENTF_KEYUP, 0);
keybd_event (0x43, 0, KEYEVENTF_EXTENDEDKEY, 0);
Sleep (1);
keybd_event (0x43, 0, KEYEVENTF_KEYUP, 0);
Everything works fine, but after I stop the program, ctrl is still pressed and I have to reset my pc to turn it off. I tried to change the order but still nothing.
keybd_event (VK_CONTROL, 0, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event (0x43, 0, KEYEVENTF_EXTENDEDKEY, 0);
sleep (500);
keybd_event (VK_CONTROL, 0, KEYEVENTF_KEYUP, 0);
Sleep (1);
keybd_event (0x43, 0, KEYEVENTF_KEYUP, 0);
What should I do to fix this?
Related
I have this in my Notepad:
hello
I want to simulate selecting in C++ using Windows' keybd_event function.
here is my code:
keybd_event(VK_SHIFT, 0, 0, 0);
for (size_t i = 0; i < 5; i++)
{
keybd_event(VK_LEFT, 0, 0, 0);
keybd_event(VK_LEFT, 0, KEYEVENTF_KEYUP, 0);
}
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP, 0);
but after I run this, it didn't select anything, it just go to the start of the file. Why isn't this working?
Add KEYEVENTF_EXTENDEDKEY will select rightly.
https://learn.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-keybdinput#members
#include <windows.h>
void main()
{
Sleep(2000);
keybd_event(VK_SHIFT, MapVirtualKey(VK_SHIFT, 0), KEYEVENTF_EXTENDEDKEY, 0);
for (size_t i = 0; i < 5; i++)
{
keybd_event(VK_LEFT, 0, 0, 0);
keybd_event(VK_LEFT, 0, KEYEVENTF_KEYUP, 0);
Sleep(20);
}
keybd_event(VK_SHIFT, MapVirtualKey(VK_SHIFT, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
}
Use VK_SHIFT in keybd_event, There is a problem that shift cannot be released，I recommend you use SendInput instead of keybd_event.
For higher-level operations, I also recommend you use UI Automation.
https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-sendinput
https://learn.microsoft.com/en-us/windows/win32/winauto/entry-uiauto-win32
I am trying to make a way to toggle my window between windowed mode and fullscreen mode. I had done it successfully except for one problem. The title bar is not working! You can’t move the window either. Without this piece of code everything works just fine.
setFullscreen method:
void Window::setFullscreen(bool fullscreen)
{
GLFWmonitor* monitor = glfwGetPrimaryMonitor();
const GLFWvidmode* mode = glfwGetVideoMode(monitor);
if (fullscreen) {
glfwSetWindowMonitor(m_window, monitor, 0, 0, mode->width, mode->height, mode->refreshRate);
glViewport(0, 0, mode->width, mode->height);
}
if (!fullscreen) {
glfwSetWindowMonitor(m_window, nullptr, 0, 0, m_width, m_height, GLFW_DONT_CARE);
glViewport(0, 0, m_width, m_height);
}
}
The result of the code:
#tomasantunes help me figure this out.
in setFullscreen I am setting the window to be at 0, 0 or the top left of the screen. The title bar didn't actually disappear is was just off screen. so if I set the window to be at 100, 100 instead I get the title bar back. This was pretty dumb of me to make a stupid mistake like this.
if (!fullscreen) {
glfwSetWindowMonitor(m_window, nullptr, 0, 0, m_width, m_height, GLFW_DONT_CARE); // I set the position to 0,0 in the 3rd and 4th parameter
glViewport(0, 0, m_width, m_height);
}
Fixed code:
if (!fullscreen) {
glfwSetWindowMonitor(m_window, nullptr, 100, 100, m_width, m_height, GLFW_DONT_CARE); // I set the position to 100, 100
glViewport(0, 0, m_width, m_height);
}
New result:
Not sure if you are still looking for an answer, however, the code I have here fixes that same problem you were initially having.
Before changing to full-screen mode, save the window position and size.
int xPos, yPos, width, height; //have somewhere stored out of function scope.
glfwGetWindowPos(windowPtr, &xPos, &yPos);
glfwGetWindowSize(windowPtr, &width, &height);
and then when changing from full-screen back to windowed mode, apply the saved positions and size properties.
glfwSetWindowMonitor(windowPtr, nullptr, xPos, yPos, width, height, 0); //Refresh rate is ignored without an active monitor.
My incoming data is 3840.2160, how should I edit my draw image function for this resolution? If you have a sample for 1080p, you can share it too.
I made some changes on the values in the code below. Do not take those values into account.
public void DrawImage(int image)
{
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
GL.LoadIdentity();
GL.Ortho(0, 3840, 0, 2160, -1, 1);
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
GL.LoadIdentity();
GL.Disable(EnableCap.Lighting);
GL.Enable(EnableCap.Texture2D);
//GL.Color4(1, 0, 0, 1);
GL.BindTexture(TextureTarget.Texture2D, image);
GL.Begin(BeginMode.Quads);
GL.TexCoord2(0, 0);
GL.Vertex3(0, 0, 0);
GL.TexCoord2(1, 0);
GL.Vertex3(2160, 0, 0);
GL.TexCoord2(1, 1);
GL.Vertex3(2160, 3840, 0);
GL.TexCoord2(0, 1);
GL.Vertex3(0, 3840, 0);
GL.End();
GL.Disable(EnableCap.Texture2D);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Modelview);
}
Using the following code
Sleep(3000);
keybd_event(VK_SHIFT, 0, 0, 0);
keybd_event(VK_DOWN, 0, 0, 0);
keybd_event(VK_DOWN, 0, KEYEVENTF_KEYUP, 0);
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP, 0);
I expect windows to select a line of text if i place my cursor in an editor during the sleep (hence it is foreground window)
However this just moves the cursor down a line.
Using the following works but surely this isn't the way its supposed to be done.
Sleep(3000);
keybd_event(VK_SHIFT, 0, KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_DOWN, 0, 0, 0);
keybd_event(VK_DOWN, 0, KEYEVENTF_KEYUP, 0);
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP | KEYEVENTF_EXTENDEDKEY, 0);
keybd_event(VK_SHIFT, 0, 0, 0);
keybd_event(VK_SHIFT, 0, KEYEVENTF_KEYUP, 0);
It appears by using the KEYEVENTF_EXTENDEDKEY flag I can hold it down for the arrow key. But no matter how I try to release it doesn't work. But I can press and release it normally to clear the held shift key.
I am trying to output a PNG image by using GDI+, MFC. I want to output it with 25% opacity. Below is the way to output a PNG image on x=10, y=10:
CDC *pDC =GetDC();
Graphics graphics(pDC->m_hDC);
Image image(L"test1.png", FALSE);
graphics.DrawImage(&image, 10, 10);
But I don't know how to make it translucent. Any idea?
To draw the image with alpha blending, declare Gdiplus::ImageAttributes and Gdiplus::ColorMatrix with required alpha channel:
float alpha = 0.25f;
Gdiplus::ColorMatrix matrix =
{
1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, alpha, 0,
0, 0, 0, 0, 1
};
Gdiplus::ImageAttributes attrib;
attrib.SetColorMatrix(&matrix);
graphics.DrawImage(&image,
Gdiplus::Rect(10, 10, image.GetWidth(), image.GetHeight()),
0, 0, image.GetWidth(), image.GetHeight(), Gdiplus::UnitPixel, &attrib);
See also: Using a Color Matrix to Transform a Single Color
Note that GetDC() is usually not used in MFC. If you do use it, be sure to call ReleaseDC(pDC) when pDC is no longer needed. Or simply use CClientDC dc(this) which has automatic cleanup. If painting is done in OnPaint then use CPaintDC which also has automatic cleanup:
void CMyWnd::OnPaint()
{
CPaintDC dc(this);
Gdiplus::Graphics graphics(dc);
...
}