SwipeContainer
A SwipeContainer in TouchGFX is a specialization of the Container that consists of multiple pages, which can be accessed by swiping between them. The pages in the SwipeContainer can contain other widgets, similar to the Container.
SwipeContainer running in the simulator
Widget Group
The SwipeContainer can be found in the Containers widget group in TouchGFX Designer.
SwipeContainer in TouchGFX Designer
Properties
The properties for the SwipeContainer are described in the following sections.
| Property Group | Property Descriptions |
|---|---|
| Name | Name of the widget. Name is the unique identifier used in TouchGFX Designer and code. |
| Location | X and Y specify the top left corner of the widget relative to its parent. W and H specify the width and height of the widget. Visible specifies the visibility of the widget. Making the widget invisible also disables interacting with the widget through the screen. |
| Pages | Selected Page specifies the page shown on the canvas. This page will also be the starting page when the project is running. The + button creates a new page when clicked. |
| Page indicator | Show page indicator specifies the visibility of the page indicator. X and Y specify the top left corner of the page indicator relative to the top left corner of the widget. Center horizontally specifies if the position page indicator should be centered in the x-axis of the widget. Style specifies a predefined setup of the widget, that sets select properties to predefined values. These styles contain images that are free to use. Normal Image and Highlighted Image specify the images assigned to the normal and highlighted states of the PageIndicator. |
| Swipe settings | Swipe threshold specifies the distance that has to be swiped by the user before resulting in a page change. End swipe elastic width specifies the distance the first and last pages can be swiped beyond the borders of the widget before stopping. |
| Mixins | Draggable specifies if the widget is draggable at runtime. ClickListener specifies if the widget emits a callback when clicked. FadeAnimator specifies if the widget can animate changes to its Alpha value. MoveAnimator specifies if the widget can animate changes to X and Y values. |
Interactions
The actions and triggers supported by the SwipeContainer are described in the following sections.
Actions
| Standard widget action | Description |
|---|---|
| Hide widget | Hides a widget (sets visibility to false). |
| Show widget | Make a hidden widget visible (sets visibility to true). |
Triggers
The SwipeContainer does not emit any triggers.
Performance
A SwipeContainer is a Container type and does not per default appear in the draw chain. Therefore, the performance is mostly dependent on the drawing performance of the children, though the SwipeContainer also does some image drawing in the form of its PageIndicator.
For more details on drawing performance, read the General UI Component Performance section.
Examples
Generated Code
In the generated code for the View base class we can see how the TouchGFX Designer sets up the SwipeContainer of two pages with a page indicator centered horizontally.
Screen1ViewBase.cpp
#include <gui_generated/screen1_screen/Screen1ViewBase.hpp>
#include "BitmapDatabase.hpp"
Screen1ViewBase::Screen1ViewBase()
{
swipeContainerName.setXY(15, 10);
swipeContainerName.setPageIndicatorBitmaps(touchgfx::Bitmap(BITMAP_BLUE_PAGEINDICATOR_DOT_INDICATOR_SMALL_NORMAL_ID), touchgfx::Bitmap(BITMAP_BLUE_PAGEINDICATOR_DOT_INDICATOR_SMALL_HIGHLIGHT_ID));
swipeContainerName.setPageIndicatorXY(210, 0);
swipeContainerName.setSwipeCutoff(50);
swipeContainerName.setEndSwipeElasticWidth(50);
swipeContainerNamePage1.setWidth(450);
swipeContainerNamePage1.setHeight(250);
swipeContainerName.add(swipeContainerNamePage1);
swipeContainerNamePage2.setWidth(450);
swipeContainerNamePage2.setHeight(250);
swipeContainerName.add(swipeContainerNamePage2);
swipeContainerName.setSelectedPage(0);
add(swipeContainerName);
}
Tip
swipeContainerName.invalidate() if you change the appearance of the widget.TouchGFX Designer Examples
To further explore the SwipeContainer, try creating a new application within TouchGFX Designer with the following UI template:
Swipe Container Example UI template in TouchGFX Designer