Handler-option


Base class to construct a higher-level handler for event sequences. All handlers have activate and deactivate methods. In addition, they have methods named like browser events. When a handler is activated, any additional methods named like a browser event is registered as a listener for the corresponding event.

When a handler is deactivated, those same methods are unregistered as event listeners. Handlers also typically have a callbacks object with keys named like the abstracted events or event sequences that they are in charge of handling. The controls that wrap handlers define the methods that correspond to these abstract events - so instead of listening for individual browser events, they only listen for the abstract events defined by the handler.

Handlers are created by controls, which ultimately have the responsibility of making changes to the the state of the application. Handlers themselves may make temporary changes, but in general are expected to return the application in the same state that they found it. The control that initialized this handler.

Handler constants to construct a keyMask. The keyMask is used by checkModifiers. If the keyMask matches the combination of keys down on an event, checkModifiers returns true. Note that this property is not part of the stable API.

Use of the evt property should be restricted to controls in the library or other applications that are willing to update with changes to the OpenLayers code. When touch events are started touch will be true and all mouse related listeners will do nothing. Check the keyMask on the handler. If no keyMask is set, this always returns true. If a keyMask is set and it matches the combination of keys down on an event, this returns true.

With each registered browser event, the handler sets its own evt property. This property can be accessed by controls if needed to get more information about the event that the handler is processing. This allows modifier keys on the event to be checked alt, shift, ctrl, and meta cannot be checked with the keyboard handler. For a control to determine which modifier keys are associated with the event that a handler is currently processing, it should access code handler.

If set as the keyMaskcheckModifiers returns false if any key is down. If set as the keyMaskcheckModifiers returns false if Shift is down. If set as the keyMaskcheckModifiers returns false if Ctrl is down. If set as the keyMaskcheckModifiers returns false if Alt is down. If set as the keyMaskcheckModifiers returns false if Cmd is down.

Handler Base class to construct a higher-level handler for event sequences. Handler Construct a handler. Functions setMap checkModifiers Check the keyMask on the handler. If a map property is present in the options argument it will be used instead.

The values for these properties are functions defined by the control that get called by the handler. Returns false if the handler was already active. Returns false if the handler was already inactive. Map are interactive maps embedded in a web page.

Akcje, handler-option i handler-option nie sa zbyt wiele Probki mozna handlowac za posrednictwem tej fizycznym miejscu. To niemozliwe, dopiero zaczyna sie rozumiec wszystko handler-option technikach i wytycznymi obrotu bez zadnej pomocy. Ktos bedzie potrzebna przez nich skierowac je przez wszystko.

Jezeli srodki propozycji binarne moze odegrac niesamowita rola moze byc. Sa takie, ktore maja znaczne wieloletnie doswiadczenie na swoim koncie.