Show button instead of event handler block in toolbox if the event handler has already been used #222
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Added support for making a category initially expanded. Cleaned up other classes in toolbox/items.ts. Modified getHardwareCategory in toolbox/hardware_category.ts so the Hardware or Robot category are initially expanded. Modified getToolboxJSON in toolbox/toolbox.ts so it prevent a problem with blockly choking on our Category class. Modified code that puts event handler blocks in the toolbox so that if an event handler is already on the workspace, a button for that event is put in the toolbox. If the user hits the button, an info message tells the user that the event handler is already on the workspace.
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Here's what it looks like: 
Here's what it looks like when the user clicks on the button: 
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alan412
requested changes
Sep 6, 2025
If the blockly workspace is RTL, reverse the words in the button text.
…olor for each theme.
alan412
approved these changes
Sep 9, 2025
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Show button instead of event handler block in toolbox if the event handler has already been used.
Modified code that puts event handler blocks in the toolbox so that if an event handler is already on the workspace, a button for that event is put in the toolbox. If the user hits the button, an info message tells the user that the event handler is already on the workspace.
Added class Button to toolbox/items.ts.
Added support for making a category initially expanded.
Cleaned up other classes in toolbox/items.ts.
Modified getHardwareCategory in toolbox/hardware_category.ts so the Hardware or Robot category are initially expanded.
Modified getToolboxJSON in toolbox/toolbox.ts so it prevent a problem with blockly choking on our Category class.