+ * The API supports both LCDUI and eSWT UI toolkits. + *
+ * Using this class is safe when a device does not support tactile feedback. In + * this case methods of this class can be called but this has no effect. + *
+ * Tactile feedback can be generated in two ways: + *
+ * Direct feedback is given instantly with {@link #directFeedback + * directFeedback} specifying the feedback type. Direct feedback can be used + * when the user action is not just a tap in a certain area. For example if the + * user drags from one menu item to the other the application may give direct + * feedback to emphasize focus traverse. + *
+ * In case of area registry for eSWT Control, the registry needs to be updated
+ * every time when the size or position of a UI component changes, or when e.g.
+ * a state of a UI component changes in such way that feedback type also
+ * changes. Typically the area update may be implemented in
+ * controlMoved and controlResized methods of
+ * ControlListener interface.
+ *
+ * In case of area registry for LCDUI Canvas or CustomItem no further actions + * are required to update tactile feedback areas when a CustomItem is moved in a + * Form or when a Canvas is changed due to e.g. orientation switch. + *
+ * There are quite tight latency requirements for tactile feedback, and in most + * cases feedback should be triggered in less than 30ms from the time when user + * touched the screen. For the area registry the feedback system is responsible + * of fulfilling this requirement, but in case of direct feedback it is the + * responsibility of the user of this API. + *
+ * The tactile feedback has 2 different styles: Basic and Sensitive. Each type + * is defined in the device settings, not by this API. Each style of feedback is + * used in different cases. Typically Basic style is used to emphasize the tap + * event, while Sensitive style is used mostly at dragging operations, to + * emphasize focus traverse, text selection, etc. Choosing a specific style for + * each use case in up to developer, however it is good to follow the behavior + * of native applications. + *
+ * The goal of the API is to enable user-created UI components to have tactile
+ * feedback. The UI component types supported by the API are limited to
+ * user-defined components only: javax.microedition.lcdui.Canvas,
+ * javax.microedition.lcdui.CustomItem,
+ * org.eclipse.swt.widgets.Control. Other UI components (i.e. List,
+ * TextBox, etc.) get default tactile feedback automatically from the platform.
+ *
+ * @version 0.001
+ * @since 1.2
+ */
+
+public class TactileFeedback
+{
+
+ /**
+ * Constant for specifying basic tactile feedback style. Actual style
+ * behaviour is set through device settings.
+ */
+ public static final int FEEDBACK_STYLE_BASIC = 1;
+
+ /**
+ * Constant for specifying sensitive tactile feedback style. Actual style
+ * behaviour is set through device settings.
+ */
+ public static final int FEEDBACK_STYLE_SENSITIVE = 2;
+
+ private final String invalidFeedbackStyleMsg = "Invalid feedback style specified";
+ private final String invalidControlTypeMsg = "Invalid object provided for tactile feedback registration";
+
+ private static final int TYPE_INVALID = 0;
+ private static final int TYPE_ESWT = 1;
+ private static final int TYPE_LCDUI = 2;
+ private static boolean feedbackEnabled;
+
+ /**
+ * Constructs tactile feedback engine object. The object may be used in both
+ * LCDUI and eSWT java UI toolkits. TactileFeedback object must be
+ * constructed before using any tactile feedback methods.
+ */
+ public TactileFeedback()
+ {
+ }
+
+ /**
+ * Triggers direct tactile feedback of the specified style.
+ *
+ * @param style
+ * The style of the direct feedback. Use predefined values
+ * FEEDBACK_STYLE_BASIC, FEEDBACK_STYLE_SENSITIVE. Actual style
+ * behavior is set through device settings.
+ * @throws IllegalArgumentException
+ * if the style parameter has invalid type.
+ */
+ public void directFeedback(int style) throws IllegalArgumentException
+ {
+ if ((style != FEEDBACK_STYLE_BASIC)
+ && (style != FEEDBACK_STYLE_SENSITIVE))
+ throw new IllegalArgumentException(invalidFeedbackStyleMsg);
+ if (org.eclipse.swt.widgets.Display.getCurrent() == null)
+ {
+ final int fStyle = style;
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+ public void run()
+ {
+ // OS.MTouchFeedback_InstantFeedback(fStyle);
+ }
+ });
+
+ }
+ else
+ {
+ //OS.MTouchFeedback_InstantFeedback(style);
+ }
+ }
+
+ /**
+ * Queries the device if it supports tactile feedback. It is safe to use
+ * this class even if the device does not support tactile feedback. Methods
+ * of this class can be called but this has no effect.
+ *
+ * @return true if the device supports tactile feedback, false otherwise.
+ */
+ public boolean isTouchFeedbackSupported()
+ {
+ if (org.eclipse.swt.widgets.Display.getCurrent() == null)
+ {
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+
+ public void run()
+ {
+ // feedbackEnabled = OS
+ // .MTouchFeedback_TouchFeedbackSupported();
+ }
+ });
+ }
+ else
+ {
+ // feedbackEnabled = OS.MTouchFeedback_TouchFeedbackSupported();
+ }
+ return feedbackEnabled;
+ }
+
+ /**
+ * Registers area within a UI component for tactile feedback. If areas
+ * overlap then the feedback is given from the last registered area.
+ * {@link #moveFeedbackAreaToFirstPriority moveFeedbackAreaToFirstPriority}
+ * can be used to bring a certain area covered by another area into action.
+ * If an area with specified id is already registered it is
+ * updated. When updating an existing area there is no need to unregister it
+ * before re-registering again with new coordinates and/or feedback style.
+ * The area specified by x, y, width
+ * and height parameters may be located on the screen just
+ * partially.
+ *
+ *
+ * In case of area registry for eSWT Control, the registry needs to be
+ * updated every time when the size or position of a UI component changes,
+ * or when e.g. a state of a UI component changes in such way that feedback
+ * type also changes. Typically the area update may be implemented in
+ * controlMoved and controlResized methods of
+ * ControlListener interface. The update of an area may be
+ * implemented by calling registerFeedbackArea with the same area id but new
+ * coordinates and/or feedback style.
+ *
+ * In case of area registry for LCDUI Canvas or CustomItem no further
+ * actions are required to update tactile feedback areas when a CustomItem
+ * is moved in a Form or when a Canvas is changed due to e.g. orientation
+ * switch.
+ *
+ * @param uiObject
+ * The UI component for tactile feedback registration. Valid
+ * object types are: javax.microedition.lcdui.Canvas
+ * , javax.microedition.lcdui.CustomItem,
+ * org.eclipse.swt.widgets.Control.
+ * @param id
+ * Id of the new tactile feedback area to be registered. Id's are
+ * used to identify particular tactile feedback area within one
+ * UI component. Id's do not need to be consecutive numbers.
+ * @param x
+ * x-coordinate of the top-left corner of tactile feedback
+ * rectangle to register.
+ * @param y
+ * y-coordinate of the top-left corner of tactile feedback
+ * rectangle to register.
+ * @param width
+ * Width of tactile feedback rectangle to register.
+ * @param height
+ * Height of tactile feedback rectangle to register.
+ * @param style
+ * The style of the feedback for specified area. Use predefined
+ * values FEEDBACK_STYLE_BASIC,
+ * FEEDBACK_STYLE_SENSITIVE. Actual style behaviour
+ * is defined through device settings.
+ * @throws IllegalArgumentException
+ * if the uiObject parameter has invalid type.
+ * @throws IllegalArgumentException
+ * if the style parameter has invalid type.
+ */
+ public void registerFeedbackArea(Object uiObject, int id, int x, int y,
+ int width, int height, int style) throws IllegalArgumentException
+ {
+ int type = controlType(uiObject);
+ if (type == TYPE_INVALID)
+ throw new IllegalArgumentException(invalidControlTypeMsg);
+
+ if ((style != FEEDBACK_STYLE_BASIC)
+ && (style != FEEDBACK_STYLE_SENSITIVE))
+ throw new IllegalArgumentException(invalidFeedbackStyleMsg);
+
+ int controlHandle = getControlHandle(uiObject);
+ if (type == TYPE_LCDUI)
+ {
+ final int fControlHandle = controlHandle;
+ final int fId = id;
+ final int fX = x;
+ final int fY = y;
+ final int fWidth = width;
+ final int fHeight = height;
+ final int fStyle = style;
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+
+ public void run()
+ {
+ // OS.MTouchFeedback_SetFeedbackArea(fControlHandle,
+ // fId, fX, fY, fWidth, fHeight, fStyle);
+ }
+ });
+ }
+ else
+ {
+ //OS.MTouchFeedback_SetFeedbackArea(controlHandle, id, x, y, width,
+ // height, style);
+ }
+ }
+
+ /**
+ * Unregisters tactile feedback area within a UI component.
+ *
+ * @param uiObject
+ * The UI component for tactile feedback area de-registration.
+ * Valid object types are:
+ * javax.microedition.lcdui.Canvas,
+ * javax.microedition.lcdui.CustomItem,
+ * org.eclipse.swt.widgets.Control.
+ * @param id
+ * Id of the tactile feedback area to be unregistered. Id's are
+ * used to identify particular tactile feedback area within one
+ * UI component. If given id was not registered by
+ * {@link #registerFeedbackArea registerFeedbackArea} then the
+ * call has no effect.
+ * @throws IllegalArgumentException
+ * if the uiObject parameter has invalid type.
+ */
+ public void unregisterFeedbackArea(Object uiObject, int id)
+ throws IllegalArgumentException
+ {
+
+ int type = controlType(uiObject);
+ if (type == TYPE_INVALID)
+ throw new IllegalArgumentException(invalidControlTypeMsg);
+
+ int controlHandle = getControlHandle(uiObject);
+ if (type == TYPE_LCDUI)
+ {
+ final int fControlHandle = controlHandle;
+ final int fId = id;
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+
+ public void run()
+ {
+ // OS.MTouchFeedback_RemoveFeedbackArea(
+ // fControlHandle, fId);
+ }
+ });
+ }
+ else
+ {
+ //OS.MTouchFeedback_RemoveFeedbackArea(controlHandle, id);
+ }
+
+ }
+
+ /**
+ * Removes all tactile feedback for a UI component.
+ *
+ * @param uiObject
+ * The UI component for tactile feedback area de-registration.
+ * Valid object types are:
+ * javax.microedition.lcdui.Canvas,
+ * javax.microedition.lcdui.CustomItem,
+ * org.eclipse.swt.widgets.Control.
+ * @throws IllegalArgumentException
+ * if the uiObject parameter has invalid type.
+ */
+ public void removeFeedbackForComponent(Object uiObject)
+ {
+ if (isTouchFeedbackSupported() == false)
+ return;
+
+ int type = controlType(uiObject);
+ if (type == TYPE_INVALID)
+ throw new IllegalArgumentException(invalidControlTypeMsg);
+
+ int controlHandle = getControlHandle(uiObject);
+
+ if (type == TYPE_LCDUI)
+ {
+ final int fControlHandle = controlHandle;
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+
+ public void run()
+ {
+ // OS.MTouchFeedback_RemoveFeedbackForControl(fControlHandle);
+ }
+ });
+ }
+ else
+ {
+ //OS.MTouchFeedback_RemoveFeedbackForControl(controlHandle);
+ }
+
+ }
+
+ /**
+ * Moves the specified tactile feedback area to first priority. Priority is
+ * significant in case of overlapping tactile feedback areas. If the tactile
+ * feedback styles of registered areas are different, the feedback from
+ * first-priority area will be given.
+ *
+ * @param uiObject
+ * The UI component for tactile feedback area de-registration.
+ * Valid object types are:
+ * javax.microedition.lcdui.Canvas,
+ * javax.microedition.lcdui.CustomItem,
+ * org.eclipse.swt.widgets.Control.
+ * @param id
+ * Id of the tactile feedback area to be unregistered. Id's are
+ * used to identify particular tactile feedback area within one
+ * UI component. If given id was not registered by
+ * {@link #registerFeedbackArea registerFeedbackArea} then the
+ * call has no effect.
+ * @throws IllegalArgumentException
+ * if the uiObject parameter has invalid type.
+ */
+ public void moveFeedbackAreaToFirstPriority(Object uiObject, int id)
+ {
+ if (isTouchFeedbackSupported() == false)
+ return;
+
+ int type = controlType(uiObject);
+ if (type == TYPE_INVALID)
+ throw new IllegalArgumentException(invalidControlTypeMsg);
+
+ int controlHandle = getControlHandle(uiObject);
+ if (type == TYPE_LCDUI)
+ {
+ final int fControlHandle = controlHandle;
+ final int fId = id;
+ com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .eSWTUIThreadRunnerSyncExec(new Runnable()
+ {
+
+ public void run()
+ {
+ // OS.MTouchFeedback_MoveFeedbackAreaToFirstPriority(
+ // fControlHandle, fId);
+ }
+ });
+ }
+ else
+ {
+ // OS.MTouchFeedback_MoveFeedbackAreaToFirstPriority(
+ // controlHandle, id);
+ }
+
+ }
+
+
+ private int controlType(Object obj)
+ {
+ if ((obj instanceof javax.microedition.lcdui.Canvas)
+ || (obj instanceof javax.microedition.lcdui.CustomItem))
+ {
+ return TYPE_LCDUI;
+ }
+ else if ((obj instanceof org.eclipse.swt.widgets.Control))
+ {
+ return TYPE_ESWT;
+ }
+ return TYPE_INVALID;
+ }
+
+ private int getControlHandle(Object uiObject)
+ {
+ int controlHandle = 0;
+ org.eclipse.swt.widgets.Control eSwtControl = null;
+ if (uiObject instanceof javax.microedition.lcdui.Canvas
+ || uiObject instanceof javax.microedition.lcdui.CustomItem)
+ {
+ eSwtControl = com.nokia.mj.impl.nokialcdui.LCDUIInvoker
+ .getEswtControl(uiObject);
+ }
+ else if (uiObject instanceof org.eclipse.swt.widgets.Control)
+ {
+ eSwtControl = (org.eclipse.swt.widgets.Control) uiObject;
+ }
+
+ if (eSwtControl != null)
+ {
+ controlHandle = Internal_PackageSupport.topHandle(eSwtControl);
+ }
+ return controlHandle;
+ }
+
+}