具有动态宽度的 WinForms Graphics PictureBox

发布于 2024-09-25 09:43:16 字数 818 浏览 2 评论 0原文

我正在制作一个 winform .NET 应用程序。它必须以条形格式显示图形。我使用图片框是因为这是我知道如何做到这一点的唯一方法（如果有人知道更好的方法，请告诉我）。

我使用以下代码动态添加线条（图形的条形）：

int currentX = this.lineAmmount * (lineWidth + lineMargin);
pictureBox.CreateGraphics().DrawLine(new Pen(color, lineWidth), //Pen
    currentX, pictureBox.Height, //Starting (x, y)
    currentX, pictureBox.Height - Convert.ToInt32(value * graphicsScale)); //Ending (x, y)
this.lineAmmount++;

效果非常完美。

我现在想要的是图片框有一个水平滚动条。所以我将 pictureBox 放入带有 autoscroll = true 的面板中。现在我需要它来动态增加图片框的宽度。所以我在添加每一行后添加了这段代码：

pictureBox.Width = Math.Max(this.lineAmmount * (lineWidth + lineMargin), 205);

（205是我想要的最小宽度）。

该代码也很好用。宽度增加。在第一行中，Math.Max 始终返回 205，在几行之后，它开始返回其他值。从那一刻起，所有的线条都消失了！

请帮忙！！

预先感谢并抱歉我的英语不好，

迭戈

原文

I'm making a winform .NET app. It must show a graphic in bars format. I'm using a picturebox because it's the only way I know how to do it (if someone knows a better way, please tell me).

I'm adding dynamically the lines (the bars of the graphic) with this code:

int currentX = this.lineAmmount * (lineWidth + lineMargin);
pictureBox.CreateGraphics().DrawLine(new Pen(color, lineWidth), //Pen
    currentX, pictureBox.Height, //Starting (x, y)
    currentX, pictureBox.Height - Convert.ToInt32(value * graphicsScale)); //Ending (x, y)
this.lineAmmount++;

That works just perfect.

What I want now is the pictureBox to have an horizontal scroll bar. So what I put the pictureBox into a panel with autoscroll = true. Now what I needed its to dynamically increase the pictureBox width. So I added this code after I add each line:

pictureBox.Width = Math.Max(this.lineAmmount * (lineWidth + lineMargin), 205);

(205 is the minimum width I want).

That code also works greate. The width is increased. With the first lines Math.Max always returns 205, after a couple of lines it starts returning the orher value. From that moment on ALL THE LINES DISAPPEAR!!!

Please help!!

Thanks in advance and sorry for my bad english,

Diego

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