One-Shot Button

General

images/download/attachments/6045140/oneshot1.PNG

Component Palette Icon:

images/download/attachments/6045140/oneshot2.PNG

Description

The One-Shot button is great for telling a PLC to do something. It simply writes a value, and then waits for it to be reset by the PLC before it is available again. Note that this is only applicable when the PLC is programmed to reset the value after reading it. If your PLC expects the HMI to reset the bit, use the Momentary Button. Also note that this component is considered safer than the momentary button, because it receives positive feedback from the PLC that the signal was received, avoiding the timing dangers associated with a Momentary Button.

To use the One-Shot button, bind an OPC tag bidirectionally to the button's Value property. When clicked, the button will write the value in its Set Value property to the Value property. Typically, Set Value is 1, and Value is 0 in a ready state, although the logic could be reversed or change simply by altering Set Value. The button can disable itself when it is writing, and will display different text. Note that the button considers itself to be writing whenever Value equals Set Value - you must make sure that the PLC resets this value, otherwise the button will remain in a writing state.

Properties

Name	Description	Property Type	Scripting	Category
Antialias	Draw with antialias on? Makes text smoother	boolean	.antialias	Appearance
Background 3D?	Should this button have a 3d type background, or a flat color one?	boolean	.background3D	Appearance
Background Color	The background color of the button.	Color	.buttonBG	Appearance
Border	The border surrounding this component. NOTE that the border is unaffected by rotation.	Border	.border	Common
Border Painted?	Should the border of this button be displayed?	boolean	.borderPainted	Appearance
Confirm Text	The message to ask the user if confirmation is turned on.	String	.confirmText	Behavior
Confirm?	If true, a confirmation box will be shown.	boolean	.confirm	Behavior
Cursor	The mouse cursor to use when hovering over this component.	int	.cursorCode	Common
Data Quality	The data quality code for any tag bindings on this component.	int	.dataQuality	Data
Disable While Writing	If true, the button will be disabled while it is writing.	boolean	.disableWhileWriting	Behavior
Disabled Image Path	The relative path of the image to be displayed when this component is not enabled.	String	.disabledPath	Appearance
Enabled	If disabled, a component cannot be used.	boolean	.componentEnabled	Common
Fill Area?	Controls whether or not this button's internal area is filled	boolean	.contentAreaFilled	Appearance
Focusable	If a button is not focusable, you will not be able to interact with it with the keyboard. This means you can't "tab" over to it.	boolean	.focusable	Behavior
Font	Font of text of this component	Font	.font	Appearance
Foreground Color	The foreground color of the component.	Color	.foreground	Appearance
Horizontal Alignment	The horizontal alignment of the button's contents (text and/or image)	int	.horizontalAlignment	Layout
Horizontal Text Position	The horizontal position of the button's text relative to its image	int	.horizontalTextPosition	Layout
Icon-Text Spacing	The space (in pixels) between the icon (if any) and the text (if any)	int	.iconTextGap	Appearance
Idle Text	The text of the button while its value is not being written	String	.normalText	Behavior
Image Path	The relative path of the image.	String	.path	Appearance
Margin	The space between a button's text and its borders.	Insets	.margin	Layout
Mnemonic	A single letter that will activate the button using 'ALT-<i>mnemonic</i>'.	String	.mnemonicChar	Behavior
Mouseover Text	The text that is displayed in the tooltip which pops up on mouseover of this component.	String	.toolTipText	Common
Name	The name of this component.	String	.name	Common
Opaque	Is this button completely opaque? Most aren't, so this should usually be false.	boolean	.opaque	Common
Rollover	If true, the button may indicate that the mouse is hovering over it.	boolean	.rolloverEnabled	Behavior
Set Value	The value to set the control value to when the button is pushed.	int	.setValue	Data
Styles	Contains the component's styles	Dataset	.styles	Appearance
Value	The current value. Should be bound bi-directionally to a tag	int	.value	Data
Vertical Alignment	The vertical alignment of the button's contents (text and/or image)	int	.verticalAlignment	Layout
Vertical Text Position	The vertical position of the button's text relative to its image	int	.verticalTextPosition	Layout
Visible	If disabled, the component will be hidden.	boolean	.visible	Common
Writing Text	The text of the button while its value is being written	String	.writePendingText	Behavior

Scripting

Scripting Functions

This component does not have scripting functions associated with it.

Extension Functions

This component does not have extension functions associated with it.

Event Handlers

action

actionPerformed

This event is fired when the 'action' of the component occurs. This means when somebody selects the radio button.

.source	The component that fired this event

focus

focusGained

This event occurs when a component that can receive input, such as a text box, receives the input focus. This usually occurs when a user clicks on the component or tabs over to it.

.source	The component that fired this event.
.oppositeComponent	The other component involved in this focus change. That is, the component that lost focus in order for this one to gain it, or vise versa.

focusLost

This event occurs when a component that had the input focus lost it to another component.

.source	The component that fired this event
.oppositeComponent	The other component involved in this focus change. That is, the component that lost focus in order for this one to gain it, or vise versa.

key

keyPressed

An integer that indicates whether the state was changed to "Selected" (on) or "Deselected" (off). Compare this to the event object's constants to determine what the new state is.

.source	The component that fired this event.
.keyCode	The key code for this event. Used with the `keyPressed` and `keyReleased` events. See below for the key code constants.
.keyChar	The character that was typed. Used with the `keyTyped` event.
.keyLocation	Returns the location of the key that originated this key event. Some keys occur more than once on a keyboard, e.g. the left and right shift keys. Additionally, some keys occur on the numeric keypad. This provides a way of distinguishing such keys. See the KEY_LOCATION constants, the keyTyped event always has a location of KEY_LOCATION_UNKNOWN.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

keyReleased

Fires when a key is released and the source component has the input focus. Works for all characters, including non-printable ones, such as SHIFT and F3.

.source	The component that fired this event.
.keyCode	The key code for this event. Used with the `keyPressed` and `keyReleased` events. See below for the key code constants.
.keyChar	The character that was typed. Used with the `keyTyped` event.
.keyLocation	Returns the location of the key that originated this key event. Some keys occur more than once on a keyboard, e.g. the left and right shift keys. Additionally, some keys occur on the numeric keypad. This provides a way of distinguishing such keys. See the KEY_LOCATION constants in the documentation, the keyTyped event always has a location of KEY_LOCATION_UNKNOWN.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

keyTyped

Fires when a key is pressed and then released when source component has the input focus. Only works for characters that can be printed on the screen.

.source	The component that fired this event.
.keyCode	The key code for this event. Used with the `keyPressed` and `keyReleased` events. See below for the key code constants.
.keyChar	The character that was typed. Used with the `keyTyped` event.
.keyLocation	Returns the location of the key that originated this key event. Some keys occur more than once on a keyboard, e.g. the left and right shift keys. Additionally, some keys occur on the numeric keypad. This provides a way of distinguishing such keys. See the KEY_LOCATION constants in the documentation, the keyTyped event always has a location of KEY_LOCATION_UNKNOWN.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouse

mouseClicked

This event signifies a mouse click on the source component. A mouse click the combination of a mouse press and a mouse release, both of which must have occurred over the source component. Note that this event fires after the pressed and released events have fired.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouseEntered

This event fires when the mouse enters the space over the source component.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouseExited

This event fires when the mouse leaves the space over the source component.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mousePressed

This event fires when a mouse button is pressed down on the source component.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouseReleased

This event fires when a mouse button is released, if that mouse button's press happened over this component.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouseMotion

mouseDragged

Fires when the mouse moves over a component after a button has been pushed.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

mouseMoved

Fires when the mouse moves over a component, but no buttons are pushed.

.source	The component that fired this event.
.button	The code for the button that caused this event to fire.
.clickCount	The number of mouse clicks associated with this event.
.x	The x-coordinate (with respect to the source component) of this mouse event.
.y	The y-coordinate (with respect to the source component) of this mouse event.
.popupTrigger	Returns True (1) if this mouse event is a popup trigger. What constitutes a popup trigger is operating system dependent, which is why this abstraction exists.
.altDown	True (1) if the Alt key was held down during this event, false (0) otherwise.
.controlDown	True (1) if the Control key was held down during this event, false (0) otherwise.
.shiftDown	True (1) if the Shift key was held down during this event, false (0) otherwise.

propertyChange

Fires whenever a bindable property of the source component changes. This works for standard and custom (dynamic) properties.

.source	The component that fired this event.
.newValue	The new value that this property changed to.
.oldValue	The value that this property was before it changed.
.propertyName	The name of the property that changed. NOTE: remember to always filter out these events for the property that you are looking for! Components often have many properties that change.

Customizers

Examples

One Shot Button

images/download/attachments/6045140/OneShot.PNG