我有一个PictureBox
我使用下面的代码来移动我的对象。我需要在表单中添加一些按钮,但是当我启动程序时,箭头键在按钮中导航,而不是我的输入按键。我尝试过很多
像这样的方式PictureBox.Focus()
and PictureBox.Select()
on Form.Load()
,并在此答案上完全禁用箭头键导航here,但我的物体将不再移动。
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;
}
}
如何禁用所有按钮的箭头键导航而不影响我的代码UpdateScreen()
?
PictureBox
控制不是Selectable
因此它无法处理键盘事件。要解决这个问题,首先应该使控件可选择:
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);
}
}
然后你就可以处理PreviewKeyDown
它的事件:
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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