Node editor

Create a graph

• A C: UI app project includes logic/main.wiinodes with a working example: a counter button.
• Or add one with File > New > Wii Homebrew > Node Graph (.wiinodes)….

Double-click the file to open the node editor. Widgets come from the project's .wiiui design.

How it works

• Add Node adds a block from a category: Events, Flow, Actions, Values, Math & Logic and Text.
• Drag between ports to connect them. A port only joins ports of its own colour.
• White wires are the order things happen in. Start from an Event node (the red ones) and follow the wires.
• Coloured wires carry values: blue is a number, green is text, orange is yes/no.
• A data input with nothing wired in shows a box where you type the value to use.
• Drag a node's title to move it, drag the background to pan, and Delete removes the selected node. Right-click an input port to disconnect it.

Events

• On Start: once, when the app starts.
• On Every Frame: 60 times a second.
• On Button Pressed: when a button widget is clicked.
• On Wii Remote Button: when A, B, 1, 2, +, −, or the D-pad is pressed.

Flow and actions

• Branch: runs one path if a yes/no is true, another if not.
• Repeat: runs its body a number of times, then continues. Its index output counts from 0.
• Set Text, Set Visible and Set Color change a widget.
• Set Number / Text Variable / Yes-No store a value.
• Exit App quits to the Homebrew Channel.

Values, math and text

• Number, Text, Yes / No constants, Get blocks for variables and a widget's text, and Frame Count.
• Add, Subtract, Multiply, Divide, Remainder, Compare, And, Or, Not and Random Number. Dividing by zero gives 0.
• Number to Text, Join Text and Text Equals.

Variables

The Variables panel on the right holds values that last while the app runs. Add a Number, Text or Yes/No variable, give it a name and a starting value, then read and change it with Get and Set blocks. Renaming a variable updates every block that uses it.

Example: a click counter

1. In the UI designer, add a button named go and a label named status.
2. In the node editor, make a variable count (Number, starts at 0).
3. On Button Pressed (widget go) → Set Number (count), with Add (Get count + 1) wired into its value.
4. Then → Set Text (widget status) with Join Text (“Pressed ”, Number to Text(Get count)).
5. Build & Run, point, and click.

When a build stops

If a node refers to a widget or variable that doesn't exist, or a chain of blocks runs back into itself, the build stops and the Console says which. Use Repeat for loops.