ch36.htm

linux-unix130.linux.and.unix.ebooks130 linux and unix ebookslinuxLearning Linux - Collection of 12 E

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">Utilities</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This contains tools specific to your programming needs.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">Goodies</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This contains other non-programming related tools.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">Games &amp; Demos</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This contains some sample programs and games to play.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">info &amp; help</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This contains topics that give you help and information on the ST/X environment and

			programming in SmallTalk.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">snapshot</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This option takes a snapshot of your present ST/X environment and asks for the name

			of the image file you wish to store the snapshot in.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="92" ALIGN="LEFT" VALIGN="TOP">exit</TD>

		<TD ALIGN="LEFT" VALIGN="TOP">This option allows you to exit ST/X immediately or exit and save a snapshot of the

			current environment.</TD>

	</TR>

</TABLE>



</CENTER>

<P>The following sections describe most of these options in more detail.

<CENTER>

<H3><A NAME="Heading8<FONT COLOR="#000077">The Browsers Option</FONT></H3>

</CENTER>

<P>The Browsers option in the Launcher menu gives you access to different browsers

or editors that let you read and manipulate classes, methods, changes, senders, and

implementors. The suboptions available are



<UL>

	<LI>System Browser

	<P>

	<LI>Class Hierarchy Browser

	<P>

	<LI>Implementors

	<P>

	<LI>Senders

	<P>

	<LI>Changes Browser

	<P>

	<LI>Directory Browser

</UL>



<P>Each of these suboptions will be discussed in detail in this section.

<CENTER>

<H4><A NAME="Heading9<FONT COLOR="#000077">The System Browser</FONT></H4>

</CENTER>

<P>The standard System Browser contains five subviews:



<UL>

	<LI>Class category list

	<P>

	<LI>Class list

	<P>

	<LI>Method category list

	<P>

	<LI>Method list

	<P>

	<LI>Code view

</UL>



<P>The System Browser is shown in Figure 36.3. 



<P>

<A HREF="../art/36/36fig03.gif"><B>Figure 36.3</B></a>. <I>The System Browser. </I><BR>

<BR>

Within the ST/X system, classes are assigned to a category. A category is simply

an attribute used for grouping classes to make them easier to handle. To select a

class category, click on the name of the category in the class category list. This

is the leftmost section of the top half of the System Browser. This will display,

in the class list subview, all classes belonging to that category. The class list

subview is the second section from the far left of the system browser. You can also

select one of two special categories: <TT>* all *</TT>, which selects all classes

and lists them alphabetically; and <TT>* hierarchy *</TT>, which lists all classes

in a tree by inheritance.</P>

<P>If you select a class in the class list, all method categories for that class

will be displayed in the method category list, which is the second section from the

right in the top half of the System Browser. Like class categories, method categories

are simply for grouping methods according to their function. When you select a method

category, all methods in that category are shown in the method list view in the far

right section of the browser. The special <TT>* all *</TT> category will show all

methods in alphabetical order. Selecting a method from the method list will show

the corresponding method's source code in the code view which is the bottom half

of the System Browser.</P>

<P>The browser enables you to change either a class or its metaclass. There are two

toggle buttons, class and instance, in the same section of the browser as the class

list view. Instance, which is the default, makes the changes affect the class. Selecting

class makes the changes affect the metaclass. A pop-up menu is available in each

view by pressing the middle or menu mouse button while the pointer is in that view.

The pop-up menu available in the class category view is shown in Figure 36.4, and

the purpose of each function is shown in Table 36.2. 



<P>

<A HREF="../art/36/36fig04.gif"><B>Figure 36.4.</B></A> <I>The class category pop-up menu.

</I>



<P>

<CENTER><FONT SIZE="4"><B>Table 36.2.</B> Class category pop-up menu functions. </FONT>

<TABLE BORDER="0">

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT"><I>Function</I></TD>

		<TD ALIGN="LEFT"><I>Description</I></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>fileOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Saves all classes in the currently selected class category into one source file named

			<TT>classCategory.st</TT></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>fileOut each</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Saves all classes but puts each class into a separate file called <TT>className.st</TT></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>printOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Sends a printed representation of all classes selected to the printer including the

			method source code</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>printOut protocol</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Sends a protocol-only representation of all classes in the category to the printer

			without the method's source code</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>spawn</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a class category browser without a class category list on the currently selected

			class category</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>spawn class</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a full class browser which allows you to edit all code for the selected class

			in one view</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>update</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Rescans all classes in the system and updates the lists shown</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>find class</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Pops up a dialog box to enter the name of a class you want to search for and have

			displayed</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>rename</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Renames a category and changes the category attribute of all classes in the currently

			selected class category</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD ALIGN="LEFT" VALIGN="TOP"><TT>remove</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Removes all classes and subclasses in the current class category</TD>

	</TR>

</TABLE>



</CENTER>

<P>The class list pop-up menu appears when you press the menu mouse button with the

pointer in the class list view. The functions available from this menu are shown

in Figure 36.5 and are explained in Table 36.3. 



<P>

<A HREF="../art/36/36fig05.gif"><B>Figure 36.5.</B> </A> <I>The class list pop-up menu. </I><P>







<CENTER>

<P><FONT SIZE="4"><B>Table 36.3. </B>Class list pop-up menu functions. </FONT>

<TABLE BORDER="0">

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT"><I>Function</I></TD>

		<TD ALIGN="LEFT"><I>Description</I></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>fileOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Saves the source code of the currently selected class in a file named <TT>className.st</TT>.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>printOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Sends the source code of the currently selected class to the printer.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>printOut protocol</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Sends a protocol description of the currently selected class to the printer. The

			output will contain the class description, class comment, and the classes' protocol

			and method comments.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>spawn</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a class browser on the currently selected class.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>spawn hierarchy</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a browser on all subclasses of the currently selected class.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>hierarchy</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Shows the hierarchy of the currently selected class in the code view.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>definition</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Shows the class definition in the code view and allows you to change the class definition.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>comment</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Shows the class comment in the code view and allows you to edit it.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>class instvars</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Shows the class-instance variables for the selected class and allows you to edit

			them.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>variable search</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Provides a search facility to find different variable references and all methods

			referencing the searched-for variable.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>new class</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Allows you to create a new class using as a template the currently selected class.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>new subclass</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Same as new class but it will create a subclass of the currently selected class.</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="101" ALIGN="LEFT" VALIGN="TOP"><TT>rename</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Changes the name of the currently selected class.</TD>

	</TR>

</TABLE>

<TT></TT>

</CENTER>

<P><TT>remove</TT> Removes the currently selected class and all of its subclasses.

The method category pop-up menu appears when you press the menu mouse button while

the pointer is in the method category view. The functions available from this menu

are shown in Figure 36.6 and explained in Table 36.4. 



<P>

<A HREF="../art/36/36fig06.gif"><B>Figure 36.6.</B> </A> <I>The method category pop-up menu.

</I><P>







<CENTER>

<P><FONT SIZE="4"><B>Table 36.4.</B> Method category pop-up menu functions. </FONT>

<TABLE BORDER="0">

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="107" ALIGN="LEFT" VALIGN="TOP"><I>Function</I></TD>

		<TD ALIGN="LEFT" VALIGN="TOP"><I>Description</I></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="107" ALIGN="LEFT" VALIGN="TOP"><TT>fileOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Saves the source code of the currently selected method category in a file named <TT>className-category.st</TT></TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="107" ALIGN="LEFT" VALIGN="TOP"><TT>printOut</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Sends the source code of the currently selected method category to the printer</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="107" ALIGN="LEFT" VALIGN="TOP"><TT>spawn</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a method category browser on the currently selected method category of the

			currently selected class</TD>

	</TR>

	<TR ALIGN="LEFT" rowspan="1">

		<TD WIDTH="107" ALIGN="LEFT" VALIGN="TOP"><TT>spawn category</TT></TD>

		<TD ALIGN="LEFT" VALIGN="TOP">Starts a browser on all methods of the class which have the same category as the

			currently selected one</TD>

	</TR>