\section{The 1-D View Window}\label{oneDwin}\index{1-D View window}\index{window, 1-D View}
%
%
%
\begin{figure}[H]
%\vspace{.5in}
\centerline{\psfig{figure=ps/oneD.ps,height=359pt}}
\caption{\label{oneD}
The 1-D View window.
}
\end{figure}
 
%
%
%
\begin{description}
 
\item[Window title:]  DsTool: 1-D View \#{\it n}
\item[Function:] The 1-D View window graphically displays computed data. 
\item[Description:]  The 1-D View window is opened by selecting the 1-D View
        option from the Panels menu button located in the Command window.
	The 1-D View window can only be opened when the current dynamical
	system is a one-dimensional mapping, $f:\real \to \real$.  Multiple 1-D View
        windows can be open simultaneously.  All 
	1-D View windows display the same data, but they may use different scalings.

	The window displays the ``cobweb diagram''\index{cobweb diagram}\index{diagram, cobweb} 
	for trajectories of the system.  
	That is, given an initial point $x_0$, we draw a vertical line from $(x_0, 0)$
	to $(x_0, f(x_0))$, and then a horizontal line to $(f(x_0), f(x_0))$.
	We then repeat the process starting for $x_1 = f(x_0)$ drawing lines
	from $(x_1,x_1)$ to $(x_1,f(x_1))$ to $(f(x_1),f(x_1))$, and so forth.

        When the window is open, data is displayed as it is computed.
%        When iconized, the canvas is not updated.  When reopened, the window 
%        will be in an identical state as when it was closed, except 
%        that the canvas will now display all appropriate currently stored data.
        When the user resizes\index{window, resizing} the window, the current variable ranges are
        maintained, but the scaling is adjusted accordingly.  
 
        As the user moves the mouse in the drawing canvas, the current
        coordinates\index{coordinates of mouse} 
        of the mouse position\index{mouse, position} are displayed in the window's
        panel.  This region is blank when the mouse does not point
        into the canvas.  Mouse events in the main drawing canvas have the following
        effects:
        \begin{itemize}
        \item
                The SELECT\index{mouse, select button}
                button sets the direction of the iterator to ``forward.''  It 
                also reads the values indicated by the cursor and adjusts the value
		of the variable in the Selected Point window. 
%               If a secondary coordinate system (such as polar coordinates) is in 
%               use, then these secondary coordinates\index{coordinates, secondary} are set. \notimp{}
 
        \item
                Dragging the SELECT button while holding down SHIFT creates an elastic rectangle used
                to rescale\index{rescaling view windows} the window.  When the user releases SELECT, a notice
                appears with the options to enlarge the 
                view (the default, also known as ``zoom in'')\index{zoom}, 
                shrink the view (also known as ``zoom out''), 
                or cancel the selection.  If the enlarge option is selected, the scaling is
                adjusted so that the selected region fills the canvas.  If the
                shrink option is selected, the view is rescaled so that
                the whole view is put into the selected rectangle.  The
                values in the horizontal and vertical min and max text fields
                are updated automatically and a screen refresh is performed.
%        \item
%                Dragging the SELECT button while holding down CONTROL creates an elastic
%                rectangle used to input a region for the Multiple Orbits window.  See
%                Section~\ref{MultOrbWin} for details on this operation.
%                \index{trajectories, multiple}
        \item
                The MENU\index{mouse, menu button} button 
                sets the direction of the iterator to ``backward.''  It
                also reads the values indicated by the cursor and adjusts the 
		value of the variable in the Selected Point window.
        \item
                Clicking the ADJUST\index{mouse, adjust button} button is equivalent to selecting
                the Continue button on the Orbits window. 
%       \item
%               Clicking the ADJUST button while holding down CONTROL deletes stored data.\index{data, deleting}
%               The actual points
%               deleted depend upon the coordinates of the view window when the action is taken. If
%               every coordinate of the view window is a parameter, then the action clears
%               the parameter data.   If no coordinate of the view window is a parameter, then 
%               the action clears the trajectory data.  In the remaining cases, the
%               action clears the selected point data.  See the Reference Manual\index{reference manual} 
%               or Sections \ref{save} and \ref{load}
%               for more information on different types of data.
        \end{itemize}           
\item[Panel items:] \mbox{}
        \begin{itemize}
	\item Horizontal message:
		Identifies the three text fields to the right of this message as referring to the horizontal variable:
		the phase space variable.
		They are from left to right: the Horizontal min read-write text field, the Mouse abscissa position
		read-only text field, and the Horizontal max read-write text field.
        \item Horizontal min read-write text field:
                Displays the current minimum value of the displayed
                range of the abscissa (the variable).  
        \item Mouse abscissa position read-only text field:
                Displays the current abscissa value of the mouse.   If the mouse does not 
                point into the canvas, this region is blank.
        \item Horizontal max read-write text field:
                Displays the current maximum value of the displayed
                range of the abscissa (the variable).  
	\item Vertical message:
		Identifies the three text fields to the right of this message as referring to the horizontal variable:
		the function value.
                They are from left to right: the Vertical min read-write text field, the Mouse ordinate position
                read-only text field, and the Vertical max read-write text field. 
        \item Vertical min read-write text field:
                Displays the current minimum value of the displayed 
                range of the ordinate (the function value).  
        \item Mouse ordinate position read-only text field:
                Displays the current ordinate value of the mouse.   If the mouse does not
                point into the canvas, this region is blank.
        \item Vertical max read-write text field:
                Displays the current maximum value of the displayed 
                range of the ordinate (the function value).  
        \item Refresh command button:
                Clears the drawing canvas and redraws 
                the currently stored data as selected by the user in 
                the above settings.
	\item Toggle diagonal command button:
		Toggles the drawing of the diagonal ($y = x$) on the plotting canvas.
	\item Toggle function command button:
		Toggles the drawing of the graph of the function $y = f(x)$ on the plotting canvas.
	\item Use default ranges command button:
		Sets the ordinate and abscissa to their default ranges, and then refreshes the 
		plotting canvas.
        \item Clear command button:
                Clears trajectory data from memory, and refreshes the canvas according
                to the above settings.
        \item Dismiss command button:
                Closes the 1-D View window. 
%  The min and max fields will revert back to their default values. 
        \end{itemize}
\end{description}

