有些时候我们做的程序需要进度条，而vs提供的控件不是我们想要的。先看效果图：
进度条闪烁动画，当然背景可设为transparent
之前想手绘进度条线条的，结果控件运行时会闪烁，所以直接用了panel控件
源码：
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[defaultevent("progressclick")]
[toolboxbitmap(typeof(trackbar))]
public partial class processbar : usercontrol
{
public processbar()
{
//initializecomponent();
//this.setstyle(controlstyles.userpaint, true);
//this.setstyle(controlstyles.allpaintinginwmpaint, true);
//this.setstyle(controlstyles.doublebuffer, true);
}
private int locationx=0;
[description("单击时x的坐标")]
public int locationx
{
get { return locationx; }
}
private int current = 0;
[description("当前进度")]
public int current
{
get { return current; }
set
{
if (value > 232 || value < 0)
return;
current = value;
panelcurrent.size = new size(value, 1);
picture.location = new point(value - 4, -3);
invalidate();
}
}
private bool isplay = false;
[description("是否播放")]
public bool isplay
{
get { return isplay; }
set { isplay = value; tmrcurrent.enabled = isplay; invalidate(); }
}
public delegate void mousehandle(object sender,eventargs e);
[description("点下鼠标")]
public event mousehandle barmousedown;
int picturetype = 0;
private void tmrcurrent_tick(object sender, eventargs e)
{
if (picturetype == 0)
{ picture.image = properties.resources.play_slider_thumb; picturetype = 1; }
else
{ picture.image = properties.resources.play_slider_thumb_animate; picturetype = 0; }
graphicspath g = subgraphicspath(picture.image);
if (g == null) return;
picture.region = new region(g);
}
private unsafe static graphicspath subgraphicspath(image img)
{
if (img == null) return null;
// 建立graphicspath, 给我们的位图路径计算使用
graphicspath g = new graphicspath(fillmode.alternate);
bitmap bitmap = new bitmap(img);
int width = bitmap.width;
int height = bitmap.height;
bitmapdata bmdata = bitmap.lockbits(new rectangle(0, 0, width, height), imagelockmode.readwrite, pixelformat.format24bpprgb);
byte* p = (byte*)bmdata.scan0;
int offset = bmdata.stride - width * 3;
int p0, p1, p2; // 记录左上角0，0座标的颜色值
p0 = p[0];
p1 = p[1];
p2 = p[2];
int start = -1;
// 行座标 ( y col )
for (int y = 0; y < height; y++)
{
// 列座标 ( x row )
for (int x = 0; x < width; x++)
{
if (start == -1 && (p[0] != p0 || p[1] != p1 || p[2] != p2)) //如果 之前的点没有不透明 且 不透明
{
start = x; //记录这个点
}
else if (start > -1 && (p[0] == p0 && p[1] == p1 && p[2] == p2)) //如果 之前的点是不透明 且 透明
{
g.addrectangle(new rectangle(start, y, x - start, 1)); //添加之前的矩形到
start = -1;
}
if (x == width - 1 && start > -1) //如果 之前的点是不透明 且 是最后一个点
{
g.addrectangle(new rectangle(start, y, x - start + 1, 1)); //添加之前的矩形到
start = -1;
}
p += 3; //下一个内存地址
}
p += offset;
} bitmap.unlockbits(bmdata);
bitmap.dispose();
// 返回计算出来的不透明图片路径
return g;
}
private void paneltotal_mousedown(object sender, mouseeventargs e)
{
current = e.location.x;
locationx = e.location.x;
if (barmousedown != null)
{
barmousedown.invoke(sender, e);
}
}
private void panelcurrent_mousedown(object sender, mouseeventargs e)
{
current = e.location.x;
locationx = e.location.x;
if (barmousedown != null)
{
barmousedown.invoke(sender, e);
}
}
}
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用到的素材：
直接右键另存为图片，之所以用黑色背景是因为图片是白色的看不见，不用多说了。
提示：这里用到了unsafe关键字，需要设置项目的属性-----允许运行不安全的代码，没有设置的同学不要以为程序错了