Controlling the Preview

When Kanzi Studio loads a project, it shows in the Preview your project as if it was run as an application on a target device. You can control the Preview from the Project menu or use the shortcut keys.

../../_images/preview-menu-preview-controls.png

Shortcut key

Description

F5

Start the Preview in paused mode.

F6

Start playing the Preview.

F7

Pause the Preview.

F8

Exit the Preview.

F9

Stop the Preview.

Ctrl F5

Start the Preview in play mode.

This is the default Preview setting when you open a Kanzi Studio project. To change this setting, go to Edit > User Preferences > Advanced > Preview.

Ctrl F8

Restart the Preview.

Controlling keyboard input in the Preview

To control how the Preview handles keyboard input, when the Preview has focus and is in the Interact mode interact-mode, in the Preview click keyboard-input.

For example, to set the Preview to pass to a Text Box node keyboard input also from the keys and key combinations that are reserved as Kanzi Studio shortcuts, enable the Keyboard Input mode.

../../_images/keyboard-input-enabled1.png

Setting the font engine for the Preview

You can set which font engine you want the Kanzi Studio Preview to use to render the text in your application.

To set the font engine in the Preview:

In the main menu select Project > Properties.

../../_images/project-properties6.png

In the Properties set the Font Engine property:

  • FreeType uses the FreeType rasterizer, HarfBuzz shaper, and ICU bidirectional library, and libunibreak for line breaking. This is the default font engine.

  • iType uses the Monotype iType rasterizer and WorldType® Shaper™ for shaping.

  • None to not load a font engine. When you do not load a font engine, the Preview does not render the text in your application.

../../_images/font-engine.png

Setting the OpenGL ES wrapper for the Preview

You can set how Kanzi handles OpenGL ES content on the Windows platform, which does not support OpenGL ES. OpenGL ES differs from regular OpenGL in features such as depth mipmaps, color formats, texture compression, and shader language.

To set the OpenGL ES wrapper for the Preview:

  1. In the main menu select Project > Properties.

    ../../_images/project-properties6.png

  2. In the Properties set the Preview OpenGL ES Wrapper property:

    • GL (Emulation through desktop OpenGL) calls OpenGL directly. This is the default setting.

    • IMG (Imagination Technologies) uses a wrapper provided by Imagination Technologies to emulate OpenGL ES behavior on a system with desktop OpenGL.

      You can set this as the default value for all your Kanzi Studio projects in the Edit > User Preferences > Advanced, by setting Default Preview OpenGL ES Wrapper to IMG (Imagination Technologies).

      Note

      The IMG (Imagination Technologies) wrapper is not stable enough to be used for development. Use it only to test how the graphics in your application render when using OpenGL ES. For content development use the OpenGL.

    ../../_images/preview-opengl-es-wrapper.png

Setting the background color of the Preview

The background of the Preview is by default black. To make your content stand out from the background when the Preview is in the Interact mode interact, select Edit > User Preferences and in the Preview tab set the Preview Background Color property to the desired color.

../../_images/edit-user-preferences1.png ../../_images/preview-background-color1.png ../../_images/preview-with-background-color-set1.png

Showing only the content of Page nodes and prefabs in the Preview

By default the Preview shows your entire Kanzi project as when it is run as an application on a target device. However, you can isolate parts of your application and view each as a separate item in the Preview. This means that you can work on the content of a Page node or a prefab without instantiating the prefab.

  • To show only the content of a prefab in the Preview, in the Prefabs double-click that prefab.

    Kanzi Studio opens the prefab in a new Preview tab and shows the content of that prefab in the Preview.

    ../../_images/prefab-composition-open.png

  • To show only the content of a Page node, in the Node Tree or Pages double-click that page. Kanzi Studio opens the Page node in a new tab and shows the content of that Page node in the Preview.

    ../../_images/page-composition-open.png

When you isolate a Page node or a prefab in the Preview you can control that part of your application in the Preview with the timeline controls you can find in the bottom of Kanzi Studio. To show the timeline, in the Kanzi Studio main menu select Window > Toolbar > Timeline.

../../_images/timeline.svg

The Preview shows the Page node or a prefab in your application either in playing or paused mode:

  • In playing mode the Page node or a prefab functions just as it would as a standalone application: user interface components are interactive and animations are playing.

  • In paused mode the animations stop, but the user interface components remain active. If components execute animations, these are not played until you enter the playing mode.

When the Preview is in paused mode, you can set the application time in the timeline bar.

You can use these playback modes in the Preview.

Playback mode

Description

image0

In the continuous play mode the Preview starts playing at start time you set in the timeline bar, but does not have a set end time.

image1

In the play range mode the Preview plays in a loop the range between the start and end times you set in the timeline bar.

image2

In the play range and stop mode the Preview plays once the range between the start and end times you set in the timeline bar.