dynamic-scroll.md

Dynamic Scroll

Overview

Scroll is a specialized type of Scroll Container intended for high performance where hundreds or thousands of views need to be displayed in a scrollable list.​

{% hint style="info" %} In Totalcross this component is called DynamicScrollContainer {% endhint %}

{% hint style="info" %} Because it is a more complex example, which does not only involve the creation of the interface, we have a simpler and more direct example. To access the complete example, just go to our github. {% endhint %}

Source Code

{% code title="DynScrollContainerSample.java" %}

// Creating and positioning the DynamicScrollContainer
vsc = new DynamicScrollContainer();
vsc.setBackColor(Color.WHITE);
vsc.setBorderStyle(BORDER_SIMPLE);
add(vsc, LEFT + gap, AFTER + gap*2, FILL - gap, FILL - gap*2);
// Adding views to the DynamicScrollContainer
DynSCTestView view = new DynSCTestView(array[i], font);
view.height = Settings.screenHeight / 20;
datasource.addView(view);

{% endcode %}

Methods

Type	Name	Description
Constructor	DynamicScrollContainer( )	Creates a empty DynamicScrollContainer.
Constructor	DynamicScrollContainer(DynamicScrollContainer.DataSource datasource)	Creates a DynamicScrollContainer that sets the referred datasource
DynamicScrollContainer.AbstractView	getTopMostVisibleView( )	Return the top most visible view
Boolean	isViewVisible(DynamicScrollContainer.AbstractView view)	Return true if the view is visible
Boolean	scrollContent(int dx, int dy, boolean fromFlick)	Scroll the DynamicScrollContainer to the referred position. If the boolean is true, it does a flick animation
void	scrollToView(DynamicScrollContainer.AbstractView view)	Scroll the DynamicScrollContainer to the view
void	setDataSource(DynamicScrollContainer.DataSource datasource)	Set the DataSource
void	stopFlick()	Stops any flick animation