c++ builder 程序设计实用教程 - 4_3 动画图形的实现 - 张晋 - 17xie.htm

已经消失的不易找到的C++ builder网络教程总结

lang=EN-US>Timer1Timer</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">事件，所以我们可以把产生图形动画的代码放在这个事件中。首先用鼠标的左键激活组件</SPAN><SPAN 
lang=EN-US>Timer1</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，在窗体的事件列表中选择</SPAN><SPAN 
lang=EN-US>OnTimer1Timer</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，并且用鼠标左键双击右侧的输入框，在屏幕上就会弹出一个代码窗口，用户在其中就可以添加如下所示的产生图形动画的代码了：</SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">void 
__fastcall TForm1::Timer1Timer(TObject *Sender)<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">{<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Randomize;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Form1-&gt;Shape1-&gt;Brush-&gt;Color=RGB(random(255),random(255),random(255));<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置画刷颜色</SPAN><SPAN 
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Randomize;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">……<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Randomize;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Form1-&gt;Shape1-&gt;Pen-&gt;Width=random(10)+1;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">……<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">}<o:p></o:p></SPAN></P>
<P class=MsoNormalIndent><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在程序运行的过程中，每隔</SPAN><SPAN 
lang=EN-US>0.5</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">秒就会激活一个</SPAN><SPAN 
lang=EN-US>Timer1Timer</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">事件，程序首先通过语句</SPAN><SPAN 
lang=EN-US>Randomize;</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来初始化随机数，然后通过语句</SPAN><SPAN 
lang=EN-US>Form1-&gt;Shape1-&gt;Brush-&gt;Color=RGB(rand om(255)</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN 
lang=EN-US>random(255)random(255))</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来以随机颜色设置当前使用画刷的颜色，本示例程序动画产生的基本原理就是每隔一定的时间就对窗体上</SPAN><SPAN 
lang=EN-US>Shape1</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组件的形状、颜色等各种参数加以改变，并且改变的结果是由系统产生的随机数来决定的。</SPAN></P>
<P class=MsoNormalIndent><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">由于篇幅的关系，这里就不对动画产生的全过程加以叙述了，请读者参看附后的程序代码。</SPAN></P>
<H4><SPAN lang=EN-US>3</SPAN><SPAN 
style="FONT-FAMILY: 楷体_GB2312; mso-ascii-font-family: 'Times New Roman'">．运行程序</SPAN></H4>
<P class=MsoNormalIndent><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选择菜单</SPAN><SPAN 
lang=EN-US>File</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中的</SPAN><SPAN 
lang=EN-US>Save All</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选项，在弹出的对话框中选择合适的文件名保存文件，然后按键盘上的功能键</SPAN><SPAN 
lang=EN-US>F9</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">运行程序，程序运行结果如图</SPAN><SPAN 
lang=EN-US>4-13</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、图</SPAN><SPAN 
lang=EN-US>4-14</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和图</SPAN><SPAN 
lang=EN-US>4-15</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所示。</SPAN></P>
<P class=a style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><IMG height=189 
src="C++ Builder 程序设计实用教程 - 4_3 动画图形的实现 - 张晋 - 17xie.files/bc37a6d20b.jpg" 
width=260 v:shapes="_x0000_i1026"></SPAN></P>
<P class=MsoCaption style="MARGIN: 0cm 0cm 0pt"><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN 
lang=EN-US>4-13<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序运行结果之</SPAN><SPAN 
lang=EN-US>1</SPAN></P>
<P class=a style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><IMG height=189 
src="C++ Builder 程序设计实用教程 - 4_3 动画图形的实现 - 张晋 - 17xie.files/55029843b3.jpg" 
width=260 v:shapes="_x0000_i1027"></SPAN></P>
<P class=MsoCaption><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN 
lang=EN-US>4-14<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序运行结果之</SPAN><SPAN 
lang=EN-US>2</SPAN></P>
<P class=a><SPAN lang=EN-US><IMG height=192 
src="C++ Builder 程序设计实用教程 - 4_3 动画图形的实现 - 张晋 - 17xie.files/74f8f57fb6.jpg" 
width=265 v:shapes="_x0000_i1028"></SPAN></P>
<P class=MsoCaption><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图</SPAN><SPAN 
lang=EN-US>4-15<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序运行结果之</SPAN><SPAN 
lang=EN-US>3</SPAN></P>
<P class=MsoNormalIndent><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">附程序完整源代码如下所示：</SPAN></P>
<DIV 
style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 0cm; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 0cm; PADDING-BOTTOM: 1pt; BORDER-LEFT: windowtext 1pt solid; PADDING-TOP: 1pt; BORDER-BOTTOM: windowtext 1pt solid; mso-border-alt: solid windowtext .5pt; mso-element: para-border-div">
<P class=a0 
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0cm; BORDER-TOP: medium none; PADDING-LEFT: 0cm; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; PADDING-TOP: 0cm; BORDER-BOTTOM: medium none; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 1.0pt 0cm 1.0pt 0cm"><SPAN 
style="FONT-FAMILY: 仿宋_GB2312; mso-ascii-font-family: 'Times New Roman'">程序清单</SPAN><SPAN 
lang=EN-US 
style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></SPAN></P></DIV>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//-----------------------------------------------------------------------<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#include 
&lt;vcl.h&gt;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#pragma 
hdrstop<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'"><o:p>&nbsp;</o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#include 
&lt;stdlib.h&gt;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#include 
"Animate.h"<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//-----------------------------------------------------------------------<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'"><o:p>&nbsp;</o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#pragma 
package(smart_init)<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">#pragma 
resource "*.dfm"<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'"><o:p>&nbsp;</o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">TForm1 
*Form1;<o:p></o:p></SPAN></P>
<P class=a1 style="TEXT-INDENT: 0cm"><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//-----------------------------------------------------------------------<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">__fastcall 
TForm1::TForm1(TComponent* Owner)<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>: 
TForm(Owner)<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">{<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">}<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//-----------------------------------------------------------------------<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'"><o:p>&nbsp;</o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">void 
__fastcall TForm1::Timer1Timer(TObject *Sender)<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">{<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Randomize;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Form1-&gt;Shape1-&gt;Brush-&gt;Color=RGB(random(255),random(255),random(255));<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">//</SPAN><SPAN 
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置画刷颜色</SPAN><SPAN 
lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US 
style="FONT-FAMILY: 'Times New Roman'">Randomize;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'">switch 
(random(8))<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>{<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>case 
0:Form1-&gt;Shape1-&gt;Brush-&gt;Style=bsSolid;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>break;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>case 
1:Form1-&gt;Shape1-&gt;Brush-&gt;Style=bsClear;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>break;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>case 
2:Form1-&gt;Shape1-&gt;Brush-&gt;Style=bsHorizontal;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>break;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;</SPAN><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>case 
3:Form1-&gt;Shape1-&gt;Brush-&gt;Style=bsVertical;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>break;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>case 
4:Form1-&gt;Shape1-&gt;Brush-&gt;Style=bsFDiagonal;<o:p></o:p></SPAN></P>
<P class=a1><SPAN lang=EN-US style="FONT-FAMILY: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>break;<o:p></o:p></SPAN></P>