Question

我有像https://i.imgsafe.org/67397f9.png这样的平铺图像，并希望在某些鼠标事件中将其部分加载为图片框的图像。实际上我想要模拟按钮行为。

    Bitmap source = new Bitmap(Properties.Resources.btn_close);

    public Bitmap CropImage(Bitmap srcbmp, Rectangle dstcrp)
    {
        Bitmap bmp = new Bitmap(dstcrp.Width, dstcrp.Height);
        Graphics gfx = Graphics.FromImage(bmp);
        gfx.DrawImage(srcbmp, 0, 0, dstcrp, GraphicsUnit.Pixel);
        return bmp;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        pictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
        Rectangle section = new Rectangle(new Point(0, 93), new Size(51, 30));
        pictureBox1.Image = CropImage(source, section);
    }

    private void pictureBox1_MouseLeave(object sender, EventArgs e)
    {
        Rectangle section = new Rectangle(new Point(0, 93), new Size(51, 30));
        pictureBox1.Image = CropImage(source, section);
    }

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        Rectangle section = new Rectangle(new Point(0, 62), new Size(51, 30));
        pictureBox1.Image = CropImage(source, section);
    }

    private void pictureBox1_MouseEnter(object sender, EventArgs e)
    {
        Rectangle section = new Rectangle(new Point(0, 0), new Size(51, 30));
        pictureBox1.Image = CropImage(source, section);
    }

    private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
    {
        Rectangle section = new Rectangle(new Point(0, 0), new Size(51, 30));
        pictureBox1.Image = CropImage(source, section);
    }

这是我的代码，用于裁剪图像部分并加载为图片框的位图。我认为它不是很专业，可能有一些内存使用问题，等等...... 有没有简单的方法呢？

Answer 1

我能想到的2个解决方案

首次加载表单时，您可以为每个鼠标状态声明4个图像/位图变量1 鼠标按下，保持向上并输入
而不是一次又一次地重新调整图像，您可以在时间合适时更改图像。

var cropCoordinates = new Rectangle（new Point（0,0），new Size（51,30））;

var onMouseDownImage = new Bitmap（Properties.Resources.btn_close）;
每种状态可以有4个不同的图像框（在另一个上面分层1）并在需要时显示或隐藏

裁剪并在图片框中加载平铺图像c＃

1 个答案: