控制，使其移动图片框 [英] Controling the Moving PictureBox

问题描述

所以，我在我的运动图像框还挺stucked;此刻我的表格2加载图片框开始移动，这正是我想要的，但它不是在我的控制，这就是我想要做的，但我失败了.....所有我想要的，是移动图片框的方向由钥匙......谢谢

 使用系统进行控制; 
使用System.Collections.Generic; 
使用System.ComponentModel; 
使用System.Data这; 
使用System.Drawing中; 
使用System.Linq的; 
使用System.Text;使用System.Windows.Forms的
; 
 
命名空间WindowsFormsApplication1 
 {
公共部分类窗体2：表
 {
 
公共窗体2（）
 {
的InitializeComponent（）; 
} 
 
私人无效Form2_Load（对象发件人，EventArgs五）
 {
 timer1.Start（）; 
} 
 
私人无效Form2_KeyDown（对象发件人，发送KeyEventArgs E）
 {
如果（e.KeyCode == Keys.Right）
 {
 pictureBox1.Location =新的点（pictureBox1.Location.X + 5，pictureBox1.Location.Y）; 
} 
 
如果（e.KeyCode == Keys.Up）
 {
 pictureBox1.Location =新的点（pictureBox1.Location.X，pictureBox1.Location。 Ÿ -  5）; 
} 
 
如果（e.KeyCode == Keys.Left）
 {
 pictureBox1.Location =新的点（pictureBox1.Location.X  -  5，pictureBox1。 Location.Y）; 
} 
 
如果（e.KeyCode == Keys.Down）
 {
 pictureBox1.Location =新的点（pictureBox1.Location.X，pictureBox1.Location。 Y + 5）; 
} 
 
} 
 
私人无效timer1_Tick（对象发件人，EventArgs五）
 {
 
 pictureBox1.Location =新点（pictureBox1.Location.X + 25，pictureBox1.Location.Y）; 
} 
 
私人无效pictureBox1_Click（对象发件人，EventArgs五）
 {
 
} 
 
} 
 } 
  

解决方案

您需要一个变量，指示哪个方向框移动：

 私人枚举方向{无，左，右，上，下​​}; 
私人方向currentDir = Direction.None; 
  

计时器的Tick事件需要检查这个变量就知道往哪个方向移动的方块：

 私人无效timer1_Tick（对象发件人，EventArgs五）{
 INT VEL = 5; 
开关（currentDir）{
情况下Direction.Left：pictureBox1.Left  -  = Math.Min（VEL，pictureBox1.Left）;打破; 
情况下Direction.Right：pictureBox1.Left + = Math.Min（VEL，this.ClientSize.Width  -  pictureBox1.Right）;打破; 
情况下Direction.Up：pictureBox1.Top  -  = Math.Min（VEL，pictureBox1.Top）;打破; 
情况下Direction.Down：pictureBox1.Top + = Math.Min（VEL，this.ClientSize.Height  -  pictureBox1.Bottom）;打破; 
} 
} 
  

您KeyDown事件处理程序应简单地设置变量：

 私人无效Form1_KeyDown（对象发件人，发送KeyEventArgs E）{
开关（e.KeyData）{
案Keys.Left：currentDir = Direction.Left;打破; 
情况下Keys.Right：currentDir = Direction.Right;打破; 
情况下Keys.Up：currentDir = Direction.Up;打破; 
情况下Keys.Down：currentDir = Direction.Down;打破; 
} 
} 
  

您还需要KeyUp事件，应立即停止运动再次框：

 私人无效Form1_KeyUp（对象发件人，发送KeyEventArgs E）{
开关（e.KeyData）{ 
情况下Keys.Left：如果（currentDir == Direction.Left）currentDir = Direction.None;打破; 
情况下Keys.Right：如果（currentDir == Direction.Right）currentDir = Direction.None;打破; 
情况下Keys.Up：如果（currentDir == Direction.Up）currentDir = Direction.None;打破; 
情况下Keys.Down：如果（currentDir == Direction.Down）currentDir = Direction.None;打破; 
} 
} 
  

So, I am kinda stucked on my moving PICTURE box; at the moment my form 2 loads the picture box starts moving, that is exactly what I wanted, However it isn't in my Control and that's what I am trying to do, but I've failed.....All I want is the direction of the moving picture Box to be controlled by the keys......Thanks.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {

        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void Form2_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Right) 
            {
                pictureBox1.Location = new Point(pictureBox1.Location.X + 5, pictureBox1.Location.Y);
            }

            if (e.KeyCode == Keys.Up)
            {
                pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y - 5);
            }

            if (e.KeyCode == Keys.Left)
            {
                pictureBox1.Location = new Point(pictureBox1.Location.X - 5, pictureBox1.Location.Y);
            }

            if (e.KeyCode == Keys.Down)
            {
                pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y + 5);
            }

        }

        private void timer1_Tick(object sender, EventArgs e)
        {

           pictureBox1.Location = new Point(pictureBox1.Location.X + 25, pictureBox1.Location.Y);
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }

    }
}

解决方案

You need a variable that indicates in which direction the box is moving:

    private enum Direction { None, Left, Right, Up, Down };
    private Direction currentDir = Direction.None;

The timer's Tick event needs to check this variable to know in which direction to move the box:

    private void timer1_Tick(object sender, EventArgs e) {
        int vel = 5;
        switch (currentDir) {
            case Direction.Left:  pictureBox1.Left -= Math.Min(vel, pictureBox1.Left); break;
            case Direction.Right: pictureBox1.Left += Math.Min(vel, this.ClientSize.Width - pictureBox1.Right); break;
            case Direction.Up:    pictureBox1.Top  -= Math.Min(vel, pictureBox1.Top); break;
            case Direction.Down:  pictureBox1.Top  += Math.Min(vel, this.ClientSize.Height - pictureBox1.Bottom); break;
        }
    }

Your KeyDown event handler should simply set the variable:

    private void Form1_KeyDown(object sender, KeyEventArgs e) {
        switch (e.KeyData) {
            case Keys.Left:  currentDir = Direction.Left; break;
            case Keys.Right: currentDir = Direction.Right; break;
            case Keys.Up:    currentDir = Direction.Up; break;
            case Keys.Down:  currentDir = Direction.Down; break;
        }
    }

You also need the KeyUp event, it should stop moving the box again:

    private void Form1_KeyUp(object sender, KeyEventArgs e) {
        switch (e.KeyData) {
            case Keys.Left:  if (currentDir == Direction.Left)  currentDir = Direction.None; break;
            case Keys.Right: if (currentDir == Direction.Right) currentDir = Direction.None; break;
            case Keys.Up:    if (currentDir == Direction.Up)    currentDir = Direction.None; break;
            case Keys.Down:  if (currentDir == Direction.Down)  currentDir = Direction.None; break;
        }
    }

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