WinCalculator Button Types and Events

Numeric Button

A standard Numeric Button such as 3, 6, 8.

BeforeButtonClicked

ActionButton

Acts as a Standard button on the calculator that can perform actions but does not effect the display in any way. For example, MC, CE or C Buttons

BeforeButtonClicked

BeforeActionButtonPressed

AfterActionButtonPressed

Operator

Acts as an operator, such as +, -, /. Will clear the display once the next numeric key is pressed.

BeforeButtonClicked

BeforeCalculatePending

AfterCalculatePending

OperatorImmediateAction

Performs a calculation immediately and is not entered into the queue and does not clear the other operators either. The square root button would be an example.

BeforeButtonClicked

BeforeCalculateImmediate

AfterCalculateImmediate

OperatorPerformImmediateThenPendingCalculations

Performs a calculation immediately, the same as the OperatorImmediateAction but then also performs any remaining operations. For example, the % key. An example of how this is different from OperatorImmediateAction would be when using the square root button and another operator, the following buttons would need to be pressed to find a result:

While to find 10% of 12 you would only have to press:

The % key is an OperatorPerformImmediateThenPendingCalculations key, so after it is pressed it performs all waiting operations.

BeforeButtonClicked

BeforeCalculateImmediate

AfterCalculateImmediate

BeforeCalculatePending

AfterCalculatePending

OperatorPerformPendingCalculations

Performs pending operations such as the = key

BeforeButtonClicked BeforeCalculatePending AfterCalculatePending

BeforeButtonClickedEventHandler BeforeButtonClicked:

Fires before any button is clicked

System.EventHandler AfterCalculationComplete:

Since some calculations may actually contain multiple steps, this event fires when all calculations initiated by operator clicks are completed.

BeforeCalculatePendingEventHandler BeforeCalculatePending:

Fires on before pending Calculation, allowing user to cancel default calculation and or change the values

System.EventHandler AfterCalculatePending:

Fires after pending calculation

BeforeCalculateImmediateEventHandler BeforeCalculateImmediate:

Fires on before immediate Calculation, allowing user to cancel default calculation and or change the values

System.EventHandler AfterCalculateImmediate:

Fires after immediate calculation

DefaultCalculationFailEventHandler DefaultCalculationFail:

Fired on Failure of default calculation

BeforeCalculateImmediateEventHandler BeforeActionButtonPressed:

Fires on before action occurs, allowing user to cancel default calculation and or change the values

System.EventHandler AfterActionButtonPressed:

Fires After Action Button is Pressed