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Compiling and Testing the Widget

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Testing the Widget

Now we have completed the OnPaint handler we are ready to test the widget.

This is the full code of the widget, so far.

widget community.livecode.elanorb.rotatedtext

use com.livecode.canvas
use com.livecode.widget
use com.livecode.engine
use com.livecode.library.widgetutils

metadata title is "Rotated Text"
metadata author is "Elanor Buchanan"
metadata version is "1.0.0"

private variable mRotation as Number

property "rotation" get mRotation set setRotation

public handler OnPaint()
      variable tText as String
      variable tWidth as Real
      variable tHeight as Real

      put my width into tWidth
      put my height into tHeight
      put "LiveCode" into tText

      rotate this canvas by mRotation

      variable tRectangle as Rectangle
      variable tPath as Path

      put rectangle path of rectangle [0,0,tWidth,tHeight] into tPath
      rotate tPath by (mRotation * -1)
      put the bounding box of tPath into tRectangle
      fill text tText at center of tRectangle on this canvas      
end handler

public handler setRotation(in pRotation as Number) returns nothing
     put pRotation into mRotation
     redraw all
end handler

end widget

Just like a library we compile, test, package and install widgets using the Extension Builder.

  1. Open the Extension Builder from the Tools menu.
  2. Click the Open button.
  3. Load the ‘rotatedtext.lcb’ file.

extensionBuilder1

To test the widget click the Test button.

This will create a stack in the IDE with a Rotated Test widget on it.

  1. Go into Edit mode.
  2. Select the widget.
  3. Open the Property Inspector.
  4. Set the Rotation property.

widget1

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Expand All | Collapse All
Lessons Status
1 - Hello World Library
  • Introduction
  • Installing a Text Editor
  • Creating an LCB library
  • LCB library definition
  • LCB handler definitions
  • Compiling and testing a library in LiveCode
  • LCB metadata
  • Installing an LCB Library
  • Packaging and sharing an LCB library
  • Including an LCB library in a standalone
  • Conclusion
2 - Extended Hello World Library
  • Introduction
  • Explicit Types
  • LCB Lists and Arrays
  • Type Conversion between LCB and LiveCode Script
  • Using Explicit Typing in the Library
  • Passing Parameters to the Library
  • Using Lists in the Library
  • Documenting the Library
  • Browsing the Documentation
  • Conclusion
3 - Rotated Text Widget
  • Introduction
  • Defining a Widget
  • LCB Module Level Variables
  • Widget Properties
  • Widget Handlers
  • LCB Canvas Operations
  • Compiling and Testing the Widget
  • Installing the Widget and adding it to a Stack
  • Including the Widget in a Standalone
  • Conclusion
4 - Extended Rotated Text Widget
  • Introduction
  • Integrating Properties
  • Accessing LiveCode Control Properties
  • Handling Mouse Events
  • Saving and Loading Widgets
  • Read Only Properties
  • Documenting the Widget
  • Conclusion
5 - Pie Chart Widget
  • Introduction
  • Planning the Widget
  • Widget Properties
  • The OnCreate Handler
  • The OnPaint Handler
  • Responding to Mouse Events
  • Saving and Loading the Widget
  • Installing and Including the Widget in a Standalone
  • Documenting the Widget
  • Conclusion
6 - Modifying the Line Graph Widget
  • Introduction
  • Duplicating the Line Graph Widget
  • Additional Color Properties
  • Filling the area below the line
  • Adding graph marker mouse events
  • Conclusion
7 - Additional Resources
  • Extending LiveCode Guide
  • LiveCode Builder Language Reference
  • LiveCode Builder Style Guide
  • LiveCode Documentation Format
 

LCB Source

LCB Source
 

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