Quick Reference

Mouse techniques

Left click on graph data point. Selects that point.

Shift-control-left click. Adds estimated values in graph.

Keyboard shortcuts

Shift-o (Open GCLAS Project File). Openas a file browser window and enables opening of a GCLAS project file.

Shift-i (Import ). Opens a file browser window and enables opening of a card-image or gcl file containing concentration data and (or) streamflow data.

Shift-a (Save a GCLAS Project File as). Brings up a file browser that permits you to browse for or enter a name of a data set in which to store your project data.

Curve conventions

Color coding of curve labels corresponds to that of the curves themselves.

Line through label name indicates that the corresponding data set is not displayed on the graph.

Order of curve labels in the list indicates and controls the order in which curves are plotted; the curve listed first is plotted on top.

Commands (in File menu)

Import. Opens a file browser window and enables opening of a card-image format or gcl file.

Open. Opens a file browser window and enables opening of a gpf (GCLAS project file) format file

Save. Saves information from the current GCLAS session in a gpf file.

Pick-list entries

In file tree (from right clicking a concentration file name (node)):

Create/Edit GCLAS year. Creates a GCLAS year based on the period of record of the selected concentration file, or allows you to edit the year.

Create Curve/s. Creates a curve for a previously opened data file other than the one on which the GCLAS year is based.

In graphs:

Remove Pt(s) (pick-list item from right clicking a data point in the working graph). Removes an estimated point.

Curve label and coefficient curve panels:

Can edit. Allows for editing of curve/data.

Can mouse. Enables or disables "mousing" (data-point manipulation with the mouse) for the curve of interest.

Can move. Enables or disables curve movement with the mouse.

Curve properties. Produces a dialog with fields for changing the curve color and the size of symbols (not yet available).

Delete curve. Eliminates the entry in the curve label list.

Draw lines. Plots the linear interpolation (?) of a curve as a line, colored to correspond to the color of the curve label.

Draw symbols. Plots the measured and estimated data points.

Hide curve. Removes a previously displayed curve from the working and overview graphs.

Show curve. Displays a previously undisplayed curve on the working and overview graphs.

Reset move. Restores the curve to its original position.

In tables:

Report option (tabular data and loads/concentrations panels). Allows you to write data displayed in the table to a file.

Folder Tabs

Folder and file view (top tab in file tree and graph overview panel). Shows the files that you’ve loaded into GCLAS and the folders that they’re stored in.

Graph view (middle tab in file tree and graph overview panel). Shows an overview graph of your time-series data.

Ancillary information view (bottom tab in file tree and graph overview panel). When fully operational, will provide miscellaneous information about the GCLAS year being worked.

Apply coefficients. Displays panel views needed to apply coefficients to unadjusted data. Tabs within this tab are

Point
Single vertical

Calculate coefficients. Displays panel views needed to calculate coefficients. Tabs within this tab are

Get coeffs. Displays tables needed to compute coefficients from working graph or enter new coefficients.
Graphs. Displays graphs of time and flow versus coefficients.

Compute loads. Displays panel views needed to compute loads. Tabs within this tab are

Options. Sets computational and display options for loads.
Summary. Provides three computational options and shows monthly summary of flows, mean concentrations, and loads.

Tabs in tabular data panel display (a) editable table containing concentration data combined and streamflow data (machine interpolated, if necessary) and (b) streamflow data contained in the original card-image file (not editable).

Buttons

An explanation of what each button does can be found by moving the cursor over the button and pausing ("mousing over").

Curve label icons

Circle and slash. Curve will not respond to manipulation with the mouse. (Absence of the circle and slash means that mouse manipulation is enabled.)

Red ("active") dot. Curve representing the label is the active curve.

I-beam. Curve is editable when present.

Point symbol (an open circle in the lower-right corner). Points are displayed on the working graph.

Line symbol (a forward slash in the upper-right corner). Lines (curves) are displayed on the working graph.

Carets. Single caret means that curve can be moved. Slash through double caret means that curve has been moved but cannot presently be moved. (Curves also not moveable if the caret is absent.)

Double carets mean that curve is not in its original position.

Coefficient-relation icons

Symbol indicates a coefficient-versus-flow relation.

Indicates a coefficient-versus-time relation.

Working graph curve symbols

Rectangle means that the data point is for a representative (cross-section) sample.

X means that the data point is for an unrepresentative (point) sample.

Triangle means that the data point is an estimated value.

Editing tabular data

Numerical data. Double left click on table cell to enable editing. Position the cursor with a single left click, then delete, backspace over, or type in new numbers. Double left click to highlight all data in the cell to delete or type over everything. Then hit the Enter key to apply the change.

Dates and times. Double left click on the part of the date or time that you want to change, then use up or down arrow to increase or decrease the number.

Comments or qualifiers. Double left click on table cell to display a pick list and then select an entry from that list.

Check boxes. Check or uncheck by left clicking once and then hitting Enter.

Time editing functions

Key Time Functions

Home key Positions the cursor in the first position of the field .

End key Positions the cursor in the last position of the field.

Delete key Text selection - All the selected characters are deleted except for the separators.
No selection - The character at the current cursor position is deleted.

Backspace key Text selection - All the selected characters are deleted except for the separator.
No selection - The character before the current cursor position is deleted.

Space Key Text selection - All the selected characters are deleted except the separators.
No selection - Part (hour, minute or second) of the time at which the cursor is positioned is deleted. If the cursor is positioned on the separator then the part preceding it is cleared.

Left Arrow key Moves the cursor to the left by one character, skipping separators.

Right Arrow key Moves the cursor to the right by one character, skipping separators.

Up Arrow Key Increments the part (hour, minute or second) on which the cursor is positioned. The increment is cyclic and it updates its super field. e.g., if the mask is hh:mm:ss, the cursor is positioned on mm and the minute displayed is 59 and you press the Up arrow key then the minute changes to 00 and the hour is incremented by 1.

Down Arrow Key Decrements the part (hour, minute or second) on which the cursor is positioned. The decrement is cyclic and it updates its super field. e.g., if the mask is hh:mm:ss, the cursor is positioned on mm and the minute displayed is 00 and you press the Down arrow key then the minute changes to 59 and the hour is decremented by 1.

Character Keys [A-Z, a-z] Does nothing.

Digit Keys [0-9] Text selection - All the selected characters are deleted except the separators, the digit at the current cursor position is displayed, and the cursor position is incremented by one skipping over separators where they occur.
No selection - Displays the digit at the current cursor position and the cursor position is incremented by one skipping over separators where they occur. Each field is checked for validity as it is typed. If the field is not valid, then the digit is ignored. For example, if the hour field contains the value “15” and the cursor is positioned in front of the one, then typing a two results in an invalid field because the hour field is interpreted as “25” (and so the two is ignored). In this case, if you wish to replace the “15” with an hour value of (for example) “22”, then select the entire hour field (so that it is highlighted) before typing.

Separator key When the user presses the separator key and the cursor is not in the first column of a field; then the cursor is moved to the position following the separator. It the cursor is in the first column of a field, then the separator key does nothing.

Date editing functions

Key Date Function

Home key Positions the cursor in the first position of the field .

End key Positions the cursor in the last position of the field.

Space There is no effect of pressing this key in the month and day fields. On pressing this key in the year field, it is changed to the default current year. Date-field separator characters are not deleted on pressing this key.

Back Space On pressing this key in the month and day fields, it changes to some valid month and day respectively. On pressing this key in the year field, it is changed to the current year. Date-field separator characters are not deleted on pressing this key.

Delete On pressing this key in the month and day fields, it changes to some valid month and day respectively. On pressing this key in the year field, it is changed to the current year. Date-field separator characters are not deleted on pressing this key.

Left Arrow key Moves the cursor to the left by one character, skipping separators.

Right Arrow key Moves the cursor to the right by one character, skipping separators.

Up Arrow Key Increments the part (day, month or year) on which the cursor is positioned. The increment is cyclic and it updates its super field. e.g., if the mask is dd/mm/yyyy, the cursor is positioned on mm and the month displayed is 12 and you press the Up arrow key then the month changes to 01 and the year is incremented by 1.

Down Arrow Key Decrements the part (day, month or year) on which the cursor is positioned. The decrement is cyclic and it updates its super field. e.g., if the mask is dd/mm/yyyy, the cursor is positioned on mm and the month displayed is 01 and you press the Down arrow key then the month changes to 12 and the year is decremented by 1.

Character Keys [A-Z, a-z] Does nothing. Causes bell to ring on PC indicating invalid entry.

Digit Keys [0-9] Displays the digit at it's cursor position and the cursor position is incremented by one skipping over separators where they occur. Each field is checked for validity as it is typed. If the field is not valid, then the digit is ignored. For example, if the day field contains the value “11” and the cursor is positioned in front of the one, then typing an eight results in a the day field changing to “08” becase “08” is the only valid day-field entry that yields a valid result. If a two were typed instead of and eight, then the first digit in the day field would be replaced by a two (since “21” is a valid day in any month) and the cursor repositioned following it.

Key	Time Functions
Home key	Positions the cursor in the first position of the field .
End key	Positions the cursor in the last position of the field.
Delete key	Text selection - All the selected characters are deleted except for the separators. No selection - The character at the current cursor position is deleted.
Backspace key	Text selection - All the selected characters are deleted except for the separator. No selection - The character before the current cursor position is deleted.
Space Key	Text selection - All the selected characters are deleted except the separators. No selection - Part (hour, minute or second) of the time at which the cursor is positioned is deleted. If the cursor is positioned on the separator then the part preceding it is cleared.
Left Arrow key	Moves the cursor to the left by one character, skipping separators.
Right Arrow key	Moves the cursor to the right by one character, skipping separators.
Up Arrow Key	Increments the part (hour, minute or second) on which the cursor is positioned. The increment is cyclic and it updates its super field. e.g., if the mask is hh:mm:ss, the cursor is positioned on mm and the minute displayed is 59 and you press the Up arrow key then the minute changes to 00 and the hour is incremented by 1.
Down Arrow Key	Decrements the part (hour, minute or second) on which the cursor is positioned. The decrement is cyclic and it updates its super field. e.g., if the mask is hh:mm:ss, the cursor is positioned on mm and the minute displayed is 00 and you press the Down arrow key then the minute changes to 59 and the hour is decremented by 1.
Character Keys [A-Z, a-z]	Does nothing.
Digit Keys [0-9]	Text selection - All the selected characters are deleted except the separators, the digit at the current cursor position is displayed, and the cursor position is incremented by one skipping over separators where they occur. No selection - Displays the digit at the current cursor position and the cursor position is incremented by one skipping over separators where they occur. Each field is checked for validity as it is typed. If the field is not valid, then the digit is ignored. For example, if the hour field contains the value “15” and the cursor is positioned in front of the one, then typing a two results in an invalid field because the hour field is interpreted as “25” (and so the two is ignored). In this case, if you wish to replace the “15” with an hour value of (for example) “22”, then select the entire hour field (so that it is highlighted) before typing.
Separator key	When the user presses the separator key and the cursor is not in the first column of a field; then the cursor is moved to the position following the separator. It the cursor is in the first column of a field, then the separator key does nothing.

Key	Date Function
Home key	Positions the cursor in the first position of the field .
End key	Positions the cursor in the last position of the field.
Space	There is no effect of pressing this key in the month and day fields. On pressing this key in the year field, it is changed to the default current year. Date-field separator characters are not deleted on pressing this key.
Back Space	On pressing this key in the month and day fields, it changes to some valid month and day respectively. On pressing this key in the year field, it is changed to the current year. Date-field separator characters are not deleted on pressing this key.
Delete	On pressing this key in the month and day fields, it changes to some valid month and day respectively. On pressing this key in the year field, it is changed to the current year. Date-field separator characters are not deleted on pressing this key.
Left Arrow key	Moves the cursor to the left by one character, skipping separators.
Right Arrow key	Moves the cursor to the right by one character, skipping separators.
Up Arrow Key	Increments the part (day, month or year) on which the cursor is positioned. The increment is cyclic and it updates its super field. e.g., if the mask is dd/mm/yyyy, the cursor is positioned on mm and the month displayed is 12 and you press the Up arrow key then the month changes to 01 and the year is incremented by 1.
Down Arrow Key	Decrements the part (day, month or year) on which the cursor is positioned. The decrement is cyclic and it updates its super field. e.g., if the mask is dd/mm/yyyy, the cursor is positioned on mm and the month displayed is 01 and you press the Down arrow key then the month changes to 12 and the year is decremented by 1.
Character Keys [A-Z, a-z]	Does nothing. Causes bell to ring on PC indicating invalid entry.
Digit Keys [0-9]	Displays the digit at it's cursor position and the cursor position is incremented by one skipping over separators where they occur. Each field is checked for validity as it is typed. If the field is not valid, then the digit is ignored. For example, if the day field contains the value “11” and the cursor is positioned in front of the one, then typing an eight results in a the day field changing to “08” becase “08” is the only valid day-field entry that yields a valid result. If a two were typed instead of and eight, then the first digit in the day field would be replaced by a two (since “21” is a valid day in any month) and the cursor repositioned following it.