keyPressed() does not always fire after starting sketch

Created by: sterretjeToo

When starting a sketch from the IDE or running an exported sketch, it does not always react on keyboard input; sometimes one has to click inside the drawn area. So it looks like a started sketch does not have the focus; clicking on the titlebar in the window does not solve the issue.

The below sketch (running in the IDE) produces the issue (as said, it sometimes works correctly, sometime not).

void setup()
{
  size(400, 200);
}

void draw()
{
}

void keyPressed()
{
  println("keyPressed()");
}

Expected behaviour

The expected behaviour is that at the moment that the sketch runs and a key is pressed, the message "keyPressed()" shows.

System information

Second gen Intel I3 with 8GB memory and integrated Intel Graphics (AsRock H61M VS-R2.0)
Windows 10 Home
Processing 4.3; the issue was also observed in Processing 4.2)

Workaround

https://discourse.processing.org/t/keypressed-only-works-sometimes/22340 (July 1920) contains a (possible) workaround by using the below line in setup()

  surface.setVisible(true);

For now, it seems to have solved the issue. I will provide feedback if I still encounter the issue with the above workaround.

在 Windows 上分别从 IDE 和导出的 sketch 运行所提供的最小 sketch，测试无需点击绘图区域时 keyPressed() 是否会立即触发。首先比较 sketch 的启动行为以及窗口的焦点/可见性行为，包括报告中的 workaround surface.setVisible(true)。当两种情况下键盘输入都能在启动后立即可靠工作时，即视为完成。