A PickerView widget uses a spinning wheel metaphor to display multiple sets of values, and allows you to select a single combination of values. You can select a single combination of values by rotating the wheels, and aligning the desired row of values with the selection indicator.
Following are the real-time use cases of PickerView widget:
Widely used in alarm settings. You can choose the specific time and days of week while setting an alarm.
Used in flight bookings where the you select a date and time or a range of dates including the From date and the To date.
Used in selecting your birthday and year in a sign up form.
Widgets are normally added to your application using Quantum Visualizer, but can also be added from code. For general information on using widgets in Quantum Visualizer, see Designing an Application in the Visualizer User Guide.
For general information on the PickerView widget see the PickerView topic in the Quantum Visualizer User Guide.
The Phone widget capabilities can be broadly categorized into the following:
PickerView can have multiple components and each component comprises of keys. Users can choose the keys from different components and make the choices useful in grouping the multiple choices that user can make in different categories related to concept. For example: color, model, year of manufacturing all these three can be modeled as components with different possible values so that user can make his choice using this single widget.
NOTE: To implement PickerView in Desktop Web platform, the developer is expected to make use of multiple list boxes to achieve similar functionality.
Creating a PickerView Using a Constructor: kony.ui.PickerView
var picker = new kony.ui.PickerView(basicConf, layoutConf, pspConf);
basicConf is an object with basic properties.
layoutConf is an object with layout specific properties.
pspConf is an object with platform specific properties.
NOTE: The configuration properties should be passed only in the respective configuration objects otherwise they are ignored.
Example
//The following function is the callback function for onSelect event.
function onSelectCalBck(picker) {
/*write your logic here*/
}
//Defining the properties for PickerView with onSelect:onSelectCalBck.
var pickerBasic = {
id: "picker",
info: {
key: "PickerView"
},
skin: "pickerSkin",
focusSkin: "pickerFSkin",
masterData: [
[
["y1", "2009"],
["y2", "2010"],
["y3", "2011"], 40
],
[
["m1", "Jan"],
["m2", "Feb"],
["m3", "Mar"],
["m4", "Apr"],
["m5", "May"],
["m6", "Jun"],
["m7", "Jul"], 60
]
],
isVisible: true,
selectedKeys: ["y2", "m1"],
onSelect: onSelectCalBck
};
var pickerLayout = {
margin: [5, 5, 5, 5],
marginInPixel: true,
widgetAlignment: constants.WIDGET_ALIGN_CENTER,
hExpand: true,
containerWeight: 99
};
//Creating the PickerView.
var picker = new kony.ui.PickerView(pickerBasic, pickerLayout, {});
//Reading onSelect of the pickerView.
kony.print("pickerView onSelect event::" + picker.onSelect);
Limitations
The following are the limitations of a PickerView widget:
You must avoid resizing a PickerView widget or placing multiple PickerView widgets side- by- side in the horizontal direction. You must avoid doing so because, by resizing or placing multiple PickerView widgets side- by- side in the horizontal direction, when the PickerView widget is rendered, the PickerView widget alignment might not be confined to the screen width and results in a bad user experience.
