[英]Move PictureBox using Arrow Keys - Handle keyboard events in PictureBox
I have a PictureBox
where I use the code below to move my object. 我有一个
PictureBox
,我使用下面的代码移动我的对象。 I need to add a few buttons in the form, however when I start the program the arrow keys navigate through the buttons instead of my input keypresses. 我需要在表单中添加几个按钮,但是当我启动程序时,箭头键会导航按钮而不是我的输入按键。 I've tried many ways like
PictureBox.Focus()
and PictureBox.Select()
on Form.Load()
, and disabling the arrow key navigation completely on this answer here , but my object will not move anymore. 我在
Form.Load()
PictureBox.Select()
上尝试了很多方法,如PictureBox.Focus()
和PictureBox.Select()
,并在此处完全禁用箭头键导航,但我的对象将不再移动。
private void UpdateScreen(object sender, EventArgs e) {
if (Input.KeyPressed(Keys.Right) && Settings.direction != Direction.Left) {
Settings.direction = Direction.Right;
}
else if (Input.KeyPressed(Keys.Left) && Settings.direction != Direction.Right) {
Settings.direction = Direction.Left;
}
else if (Input.KeyPressed(Keys.Up) && Settings.direction != Direction.Down) {
Settings.direction = Direction.Up;
}
else if (Input.KeyPressed(Keys.Down) && Settings.direction != Direction.Up) {
Settings.direction = Direction.Down;
}
}
How do I just disable the arrow key navigation for all my buttons without affecting my code in UpdateScreen()
? 如何在不影响
UpdateScreen()
代码的情况下禁用所有按钮的箭头键导航?
PictureBox
control is not Selectable
and therefore it can not handle Keyboard events. PictureBox
控件不Selectable
,因此无法处理Keyboard事件。 To solve the problem, you should first make the control selectable: 要解决此问题,您应首先使控件可选:
using System;
using System.Windows.Forms;
class SelectablePictureBox : PictureBox
{
public SelectablePictureBox()
{
SetStyle(ControlStyles.Selectable, true);
SetStyle(ControlStyles.UserMouse, true);
TabStop = true;
}
protected override void OnEnter(EventArgs e)
{
base.OnEnter(e);
this.Invalidate();
}
protected override void OnLeave(EventArgs e)
{
base.OnLeave(e);
this.Invalidate();
}
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
if (this.Focused)
ControlPaint.DrawFocusRectangle(pe.Graphics, ClientRectangle);
}
}
Then you can handle PreviewKeyDown
event of it: 然后你可以处理它的
PreviewKeyDown
事件:
private void selectablePictureBox1_PreviewKeyDown(object sender,
PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Left)
{
e.IsInputKey = true;
myPictureBox1.Left -= 10;
}
else if (e.KeyCode == Keys.Right)
{
e.IsInputKey = true;
myPictureBox1.Left += 10;
}
}
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