我正在做一个ms绘画应用程序,绘制conture并填充inside.I编写递归函数,填补conture。它工作正常,但如果conture太大,程序会抛出stackoverflow异常。我怎么解决这个问题??我甚至不能捕获这个异常((在递归中的stackoverflow
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;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern IntPtr GetDC(IntPtr hWnd);
[DllImport("user32.dll")]
static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("gdi32.dll")]
static extern int GetPixel(IntPtr hDC, int x, int y);
[DllImport("gdi32.dll")]
static extern int SetPixel(IntPtr hDC, int x, int y, int color);
static public Color GetPixel(Control control, int x, int y)
{
Color color = Color.Empty;
if (control != null)
{
IntPtr hDC = GetDC(control.Handle);
int colorRef = GetPixel(hDC, x, y);
color = Color.FromArgb(
(int)(colorRef & 0x000000FF),
(int)(colorRef & 0x0000FF00) >> 8,
(int)(colorRef & 0x00FF0000) >> 16);
ReleaseDC(control.Handle, hDC);
}
return color;
}
static public void SetPixel(Control control, int x, int y, Color color)
{
if (control != null)
{
IntPtr hDC = GetDC(control.Handle);
int argb = color.ToArgb();
int colorRef =
(int)((argb & 0x00FF0000) >> 16) |
(int)(argb & 0x0000FF00) |
(int)((argb & 0x000000FF) << 16);
SetPixel(hDC, x, y, colorRef);
ReleaseDC(control.Handle, hDC);
}
}
int oldX, oldY;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Graphics g = panel1.CreateGraphics();
g.Clear(panel1.BackColor);
}
bool paint;
private void Form1_Load(object sender, EventArgs e)
{
}
private void panel1_MouseDown(object sender, MouseEventArgs e)
{
oldX = e.X;
oldY = e.Y;
paint = true;
}
private void panel1_MouseUp(object sender, MouseEventArgs e)
{
paint = false;
}
private void panel1_MouseMove(object sender, MouseEventArgs e)
{
if (paint)
{
Graphics g = panel1.CreateGraphics();
Pen p = new Pen(Color.Black);
g.DrawLine(p, oldX, oldY, e.X, e.Y);
oldX = e.X;
oldY = e.Y;
}
}
private void panel1_MouseDoubleClick(object sender, MouseEventArgs e)
{
fill(e.X, e.Y, Color.Black, Color.Red);
Color c = GetPixel(panel1, e.X, e.Y);
ClearButton.BackColor = c;
label1.Text = e.X + " " + e.Y;
}
private void fill(int x, int y, Color border, Color c) {
Color PointedColor = GetPixel(panel1, x, y);
try {
if (PointedColor.R != border.R && PointedColor.G != border.G && PointedColor.B != border.B &&
PointedColor.R != c.R && PointedColor.G != c.G && PointedColor.B != c.B &&
x >= 0 && x < panel1.Size.Width && y >= 0 && y < panel1.Size.Height)
{
SetPixel(panel1, x, y, c);
fill(x - 1, y, border, c);
fill(x + 1, y, border, c);
fill(x, y - 1, border, c);
fill(x, y + 1, border, c);
}
}
catch(System.StackOverflowException e)
{
label1.Text = e.Message;
}
}
}
}
尝试,只有职位SSCCE的(http://sscce.org) – 2012-06-15 06:03:52
怎么来的,如果只有一个的通道等于边界你不着色?假设边界是#FFF,并且您在形状内找到的点之一是#F00不应该被着色? – 2012-06-15 06:07:58