鲁达 颜色基本设置
普通颜色设置可以直接选取系统定义的颜色。高级设置采用RGB颜色。
Color myColor = Color.FromArgb(23,56,78);
每个数字均必须是从 0 到 255 之间的一个整数，分别表示红、绿、蓝三种原色。其中 0 表示没有该颜色，而 255 则为所指定颜色的完整饱和度。如Color.FromArgb(0,255,0)表示绿色，Color.FromArgb(255,255,0)表示黄色，Color.FromArgb(0,0,0) 呈现为黑色，而 Color.FromArgb(255,255,255) 呈现为白色。
还可以设置透明度，例如：Color myColor= Color.FromArgb(127, 23, 56, 78);
127表示50%的透明度，255表示完全不透明。
选择颜色
以下程序可以从调色板选择一个颜色，在textBox上面显示。
private void button1_Click(object sender, Sy e)
{
ColorDialog MyDialog = new ColorDialog();
MyDialog.AllowFullOpen = false ;
MyDialog.ShowHelp = true ;
MyDialog.Color = ;
if () == DialogRe)
= MyDialog.Color;
}
2.产生窗体选择颜色
本程序在一个菜单里调用选择程序，产生一个动态的窗体，选择颜色后返回主程序，刷新原来的页面。
Form form1;
bool Cform=true;
//颜色设置
private void menuItem31_Click(object sender, Sy e)
{
while (Cform)
{
CreateColorForm();
Tuli1();
DisLine();
}
Cform=true;
}
//产生颜色输入窗体
private void CreateColorForm()
{
int i;
form1=new Form();
Button [] ColorButton = new Button [myPloys.mark];
Label [] ColorLabel = new Label [myPloys.mark];
Button button0 = new Button ();
;
form1.Height=130+myPloys.mark*30;
= "等值线颜色输入";
= FormBorderS;
= false;
= FormS;
bu = "退出";
bu;
bu Point(25,50+myPloys.mark*30);
(button0);
= button0;
for (i=0;i<myPloys.mark;i++)
{
ColorLabel[i]=new Label();
ColorLabel[i].Location=(Point)new Point(30,30+30*i);
ColorLabel[i].Width=30;
ColorLabel[i].Text=myPloys.marks1[i].ToString();
(ColorLabel[i]);
ColorButton[i]=new Button();
ColorButton[i].BackColor=cColor[i];
ColorButton[i].Location=(Point)new Point(60,26+30*i);
ColorButton[i].Width=30;
switch (i)
{
case 0:
ColorButton[i].Click += new Sy(ColorButton0_Click);
break;
case 1:
ColorButton[i].Click += new Sy(ColorButton1_Click);
break;
case 2:
ColorButton[i].Click += new Sy(ColorButton2_Click);
break;
case 3:
ColorButton[i].Click += new Sy(ColorButton3_Click);
break;
case 4:
ColorButton[i].Click += new Sy(ColorButton4_Click);
break;
case 5:
ColorButton[i].Click += new Sy(ColorButton5_Click);
break;
case 6:
ColorButton[i].Click += new Sy(ColorButton6_Click);
break;
case 7:
ColorButton[i].Click += new Sy(ColorButton7_Click);
break;
case 8:
ColorButton[i].Click += new Sy(ColorButton8_Click);
break;
case 9:
ColorButton[i].Click += new Sy(ColorButton9_Click);
break;
case 10:
ColorButton[i].Click += new Sy(ColorButton10_Click);
break;
default:
break;
}
(ColorButton[i]);
}
bu += new Sy(button0_Click);
();
}
private void ColorSelect(int si)
{
ColorDialog MyDialog = new ColorDialog();
MyDialog.AllowFullOpen = true ;
MyDialog.ShowHelp = true ;
MyDialog.Color = cColor[si] ;
if () == DialogRe)
cColor[si] = MyDialog.Color;
();
}
private void ColorButton0_Click(object sender, Sy e)
{ ColorSelect(0); }
private void ColorButton1_Click(object sender, Sy e)
{ ColorSelect(1); }
private void ColorButton2_Click(object sender, Sy e)
{ ColorSelect(2); }
private void ColorButton3_Click(object sender, Sy e)
{ ColorSelect(3); }
private void ColorButton4_Click(object sender, Sy e)
{ ColorSelect(4); }
private void ColorButton5_Click(object sender, Sy e)
{ ColorSelect(5); }
private void ColorButton6_Click(object sender, Sy e)
{ ColorSelect(6); }
private void ColorButton7_Click(object sender, Sy e)
{ ColorSelect(7); }
private void ColorButton8_Click(object sender, Sy e)
{ ColorSelect(8); }
private void ColorButton9_Click(object sender, Sy e)
{ ColorSelect(9); }
private void ColorButton10_Click(object sender, Sy e)
{ ColorSelect(10); }
private void button0_Click(object sender, Sy e)
{
Cform=false;
();
}
Font和标注
基本操作
可以在指定的点开始写字，也可以在一个范围（如矩形）内写字。
Font myFont = new Font("Times New Roman", 14);
Graphics g = ();
Pen myPen=new Pen);
Sy myBrush=new SolidBru);
g.DrawRectangle(myPen,10, 10, 100, 200);
g.DrawString("Look at this text!", myFont, myBrush, new RectangleF(10, 10, 100, 200));
g.DrawString("Look at this text!", myFont, myBrush, 10, 250);
2.画点和标注
Sy myPen;
myPen = new Sy);
Sy formGraphics = ();
Sy drawBrush = new Sy);
Sy drawFont = new Sy("Arial", 8);
string drawString = "201";
float x = 100.0f;
float y = 100.0f;
(myPen, x, y,4,4);
(drawString, drawFont, drawBrush, x, y);
myPen.Dispose();
drawFont.Dispose();
drawBru();
();
3.Font定义
public Font(
FontFamily family,
float emSize,
FontStyle style,
GraphicsUnit unit
);
以下的例子可以改变字体，大小、字形、单位，还可以设置成垂直。
// Font myFont = new Font("Times New Roman",14,Fon);
Font myFont = new Font("隶书",34,Fon);
Graphics g = ();
Sy myBrush=new SolidBru);
Sy drawFormat = new Sy );
g.DrawString("Hello!你好", myFont, myBrush, 10, 10,drawFormat);
根据给定点找到实际标注点
//根据给定点，找到实际标注点，使得以画出的字符串以给定点为中心
public PointF StringCenter(string s1,float sz,PointF p0)
{
PointF p1=new PointF();
float x0=0;
float height=0;
float width=StringWidth(s1,sz,ref x0,ref height);
;
;
return p1;
}