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# This example demonstrates how to use the macro expander
# API to register a macro that can evaluate Python expressions

import examples_common

from PySide2.QtCore import QObject, SIGNAL
from PySide2.QtWidgets import QInputDialog, QMessageBox, QAction
from QtCreator import Core
from QtCreator import Utils

# Register our macro (it can be used as %{Python:exp})
Utils.MacroExpander().registerPrefix(b"Python", "Evaluate Python expressions.", lambda x: eval(x))

# Add a small menu item, that let's us test the macro
def act():
    text = QInputDialog.getMultiLineText(Core.ICore.dialogParent(),
        "Input Text", "Input your text, including some macros",
        "3 + 3 = %{Python:3+3}")
    text = Utils.MacroExpander().expand(text[0])
    QMessageBox.information(Core.ICore.dialogParent(), "Result", text)

# Add this to the "Tools" menu
action = QAction("Test Macro Expander...")
command = Core.ActionManager.registerAction(action, 'PythonExtensions.Examples.MacroExpander')
QObject.connect(action, SIGNAL('triggered()'), act)

examples_common.addExampleItem(command)