The Check Box control

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Overview of the Check Box control
Check Box control in a window or page
Creating a Check Box control
Display modes available
Three-state check box
Check Box control in a report
Check Box in a Table control
Check Box control and data binding
Swap

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The Check Box control

Overview of the Check Box control

A Check Box can correspond to:

a control allowing the user to answer a question with Yes or No in a window or page.
a column of a Table control allowing the user to select one or more rows.
a box to check in a report.

Check Box control in a window or page

In the window or page editor, a Check Box control allows the user to answer a question with Yes or No:

if the option is checked, the option is set to True.
if the option is unchecked, the option is set to False.

A Check Box can display up to 256 options. Users select the desired options. For each option, the check box returns the option status.

Example:

Creating a Check Box control

To create a Check Box control:

On the "Creation" pane, in the "Usual controls" group, click "Check Box".
Click where the control will be created in the window or page. The control appears in the editor.

Tip: You also have the ability to create a "preset" Check Box control by expanding "Check Box". The list of available controls is displayed with the project skin template. Simply click the control you want to create in the editor.

Versions 24 and later
This list proposes to create Switch controls. See Switch control for more details.

New in version 24
This list proposes to create Switch controls. See Switch control for more details.

This list proposes to create Switch controls. See Switch control for more details.

To view the control characteristics, select "Description" in the popup menu of the control.

Display modes available

WINDEV and WINDEV Mobile feature different types of Check Box controls:

standard check box,
standard check box with sub-captions,
check box in Vista style (an image can be used for each option),
check box in Vista style with sub-captions (an image can be used for each option).

The different tabs of the description window allow you to configure the control:

The display mode of the Check Box control can be selected in the "General" tab of the control description.
The "Content" tab is used to enter the characteristics specific to the display mode (image, sub-caption, row height, etc.) in the different languages of the application. These elements can be modified by programming.
The "Style" tab is used to define some characteristics specific to the display mode. It is possible to define:
- Versions 16 and later
  the spacing between the caption and the sub-caption ("Sub-caption of options" element).
  New in version 16
  the spacing between the caption and the sub-caption ("Sub-caption of options" element).
  the spacing between the caption and the sub-caption ("Sub-caption of options" element).
- the position of text of options: at the top, at the bottom, ... ("Text of options" element).
- Versions 18 and later
  the checkmark position: at the top, at the bottom, ... ("Checkmark border" element).
  New in version 18
  the checkmark position: at the top, at the bottom, ... ("Checkmark border" element).
  the checkmark position: at the top, at the bottom, ... ("Checkmark border" element).

The programming mode can change according to the type of display. See Handling a check box by programming for more details.

Three-state check box

In the window editor, you can enable three-state options for Check Box controls.

At runtime, clicking an unchecked option will check it, and a second click on this option will give it an undefined value. In this case, the option returns -1.

To enable three-state options in a Check Box control:

check the corresponding option in the "Details" tab of the Check Box control description. All the options of the check box will support the three states.
by programming, use ..TriState on one of the check box options. This option will support three states.

Check Box control in a report

Check Box in a Table control

Check Box control and data binding

Versions 15 and later
Check Box controls can use data binding under the following conditions:

if the Check Box control has a single option, it must be linked to a simple variable
if the Check Box control has several options, it must be linked to an array.

If this condition is not respected, a UI error will be generated.

New in version 15
Check Box controls can use data binding under the following conditions:

if the Check Box control has a single option, it must be linked to a simple variable
if the Check Box control has several options, it must be linked to an array.

If this condition is not respected, a UI error will be generated.

Check Box controls can use data binding under the following conditions:

if the Check Box control has a single option, it must be linked to a simple variable
if the Check Box control has several options, it must be linked to an array.

If this condition is not respected, a UI error will be generated.

Swap

WINDEV, WINDEV Mobile and WEBDEV allow you to automatically transform a Check Box control into a Radio Button control (and vice versa):

Select the control to transform.
On the "Modification", in the "Transformations" group, expand "Refactoring and swapping" and select "Radio Button / Check Box".

Related Examples:

Unit examples (WINDEV): The Check Box control

[ + ] Using a check box control.