Combo box

Figure 31 PARC 352 SoftCorr HI Potentiostatic technique combo box.

Figure 36 PARC 352 SoftCorr III Potentiodynamic technique combo box window.

The controls that can be installed on a worksheet to return a value to a worksheet cell are an option button, a check box, a list box, a drop-down list box (sometimes called a combo box), a scroll bar and a spinner. In addition, you can install a group box, which does not return a value but is used to group related controls, usually option buttons. 

A drop-down list box (combo box) displays a list of items. Initially only one item is visible in the window the user presses the drop-down button to display the rest of the list, then chooses an item. 

Combo Box Input Range a reference to a range of cells whose values will be displayed in the drop-down list box. 

The main window of NMR-SIM is subdivided in the title bar with the program name, the menu bar with the pull-down menu commands File, NMR-Wizard, Edit etc., the rf channel option bar with two accessible rf channel combo boxes and the main status window, see Fig. 1.3. Each command in the menu bar opens a pull-down menu that may contain sub-menus or commands that can be selected and opened/executed. The rf channel option bar uses isotope identifier to assign a specific nucleus and hence NMR frequency to the FI or F2 channel. The main status window is built up in line order and shows the pulse program name, spin system name and other optional files associated with the current simulation. 

Italic letters designate filenames and pathnames used for storing data on the local hard disk drive of the PC. Likewise Italic text is used for entries in edit fields or for selecting the options in list or combo boxes. 

Figure 22. Molecular Sophe Graphical User Interface showing the Add Bond window. Note the atom eontaining unpaired electrons occurs in the left hand combo box. In this example Fel is the atom containing unpaired electrons.

Figures 6.114-6.117 show dialog boxes to create and format Web Controls listed in Fig. 6.98 Text box, Check box, List box/combo box and Radio button group. Submit button was discussed previously (see Sect. 6.8.3).

There is own check box in the Check Box Properties tab (Fig. 6.115) which being enabling by a developer of MAS application transfer the changes in Mathcad worksheet into the MAS. There are the same check boxes in the Radio Button Group Properties tab (Fig. 6.116) and the List/Combo Box Properties (Fig. 6.117). 

Comparing Figs. 6.116 and 6.117, we can see a counter Display height (rows) that fixes the number of elements displayed in a list at any given time. If this number less than the number of elements in the list they appear as a scrolling list box. If we set this number to one, the list appears as standard combo box (see Figs. 6.119 and 6.120). 

Figures 6.116 and 6.117 shows two ways of setup Radio Button Group and List/Combo Box - see the check box Values equal Names. In the first case (Fig. 6.116) the value connected with the Combo Box or with the List (our unitP) receives a text name keeping in the corresponding cell of the Name column and in the second case (Fig. 6.117), the value (number or text) from the cell of the Value column. Unfortunately, a user cannot type there a built-in variable or an expression but only constants. In the non-Web analogues of the Radio button and the List box, such a formatting, through programming in one of the BASIC versions, in VBS (Visual Basic Script) appear in Fig. 6.118.

Those who designed a user interface in Visual C, Visual Basic, and Delphi, etc note that the MAS interface is rather scanty. We noted above that it has not the Combo box combining the text box and the list box. 

Figure 6.120 shows a way to combine the Text box and the List box and obtain the Combo box. 

A user is allowed to choose the filter diameter from the list (1.0,1.5,2.0, and 2.6, 3.0 or 3.4 m) or type his own value. A reader understands that the solution shown in Fig. 6.120 cannot be considered as a complete one. Thus, we still need a Combo box. 

---