topic Re: Searching a shape by inputting attribute values in a GUI window using Python. in ArcGIS CityEngine Questions

Searching a shape by inputting attribute values in a GUI window using Python.

desert — Sat, 31 Aug 2024 06:38:38 GMT

I received assistance here on how to find shapes using attribute values in a Python script.
Since it was inconvenient to directly input attribute values into the code each time, I tried entering them through the Python console, but it was impossible.
Then, I found a way to implement a GUI using Jython and tried it.

It's currently working well, including searches for Korean(2Bytes char) attributes. While it may not be the most elegant solution, I hope it helps others.
("Functional limitation - Search does not work when the attribute value is a number.")

As a program designed to handle large datasets, CityEngine must include a core functionality to search for shapes based on their attributes.(Does this feature really exist, or am I missing something?)

# Last modified: 2024-08-29 19:00:00 KST # Version: 1.4 # Requirement: Fix the issue where the input GUI window was not displaying correctly. ''' @author: desert ''' from scripting import * from javax.swing import JFrame, JLabel, JTextField, JButton, JPanel from java.awt import GridLayout, BorderLayout from java.awt.event import ActionListener # Get a CityEngine instance ce = CE() # selectByAttribute function: Select objects based on the attribute name and value def selectByAttribute(attr, value): objects = ce.getObjectsFrom(ce.scene) selection = [] for o in objects: attrvalue = ce.getAttribute(o, attr) if attrvalue == value: selection.append(o) ce.setSelection(selection) # Class defining the GUI components class InputFrame(JFrame, ActionListener): def __init__(self): self.createAndShowGUI() def createAndShowGUI(self): self.setTitle("Attribute Input") self.setSize(400, 150) self.setLayout(BorderLayout()) # Add attribute name and value fields to the central panel panel = JPanel() panel.setLayout(GridLayout(2, 2, 10, 10)) # Attribute name input field panel.add(JLabel("Attribute Name:")) self.attrField = JTextField(15) panel.add(self.attrField) # Attribute value input field panel.add(JLabel("Attribute Value:")) self.valueField = JTextField(15) panel.add(self.valueField) # Add the panel to the center self.add(panel, BorderLayout.CENTER) # Add Execute and Close buttons to the bottom buttonPanel = JPanel() buttonPanel.setLayout(GridLayout(1, 2, 10, 10)) # Execute button self.button = JButton("Search", actionPerformed=self.actionPerformed) buttonPanel.add(self.button) # Close button self.closeButton = JButton("Cancel", actionPerformed=self.closeWindow) buttonPanel.add(self.closeButton) # Add the button panel to the bottom self.add(buttonPanel, BorderLayout.SOUTH) # Set the default close operation and make the GUI visible self.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE) self.setVisible(True) # Function triggered when the button is clicked def actionPerformed(self, event): attr = self.attrField.getText() value = self.valueField.getText() selectByAttribute(attr, value) print("Selected objects with attribute '{}' and value '{}'.".format(attr, value)) self.dispose() # Function to close the window when the close button is clicked def closeWindow(self, event): self.dispose() if __name__ == '__main__': # Launch the GUI window InputFrame()

Re: Searching a shape by inputting attribute values in a GUI window using Python.

desert — Sat, 31 Aug 2024 07:27:03 GMT

I've modified the code to allow searching for numerical attribute values as well.

Please note that I'm a beginner in Python, so there might be some shortcomings.

# Last modified: 2024-08-31 16:00:00 KST # Version: 1.7 # Requirement: Fix the issue float type attr value ''' @author: desert ''' from scripting import * from javax.swing import JFrame, JLabel, JTextField, JButton, JPanel from java.awt import GridLayout, BorderLayout from java.awt.event import ActionListener # Get a CityEngine instance ce = CE() # selectByAttribute function: Select objects based on the attribute name and value def selectByAttribute(attr, value): objects = ce.getObjectsFrom(ce.scene) selection = [] for o in objects: attrvalue = ce.getAttribute(o, attr) print(type(attrvalue)) if isinstance(attrvalue,float) and attrvalue == float(value): selection.append(o) elif isinstance(attrvalue,str) and attrvalue == value: selection.append(o) ce.setSelection(selection) # Class defining the GUI components class InputFrame(JFrame, ActionListener): def __init__(self): self.createAndShowGUI() def createAndShowGUI(self): self.setTitle("Attribute Input") self.setSize(400, 150) self.setLayout(BorderLayout()) # Add attribute name and value fields to the central panel panel = JPanel() panel.setLayout(GridLayout(2, 2, 10, 10)) # Attribute name input field panel.add(JLabel("Attribute Name:")) self.attrField = JTextField(15) panel.add(self.attrField) # Attribute value input field panel.add(JLabel("Attribute Value:")) self.valueField = JTextField(15) panel.add(self.valueField) # Add the panel to the center self.add(panel, BorderLayout.CENTER) # Add Execute and Close buttons to the bottom buttonPanel = JPanel() buttonPanel.setLayout(GridLayout(1, 2, 10, 10)) # Execute button self.button = JButton("Search", actionPerformed=self.actionPerformed) buttonPanel.add(self.button) # Close button self.closeButton = JButton("Cancel", actionPerformed=self.closeWindow) buttonPanel.add(self.closeButton) # Add the button panel to the bottom self.add(buttonPanel, BorderLayout.SOUTH) # Set the default close operation and make the GUI visible self.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE) self.setVisible(True) # Function triggered when the button is clicked def actionPerformed(self, event): attr = self.attrField.getText() value = self.valueField.getText() selectByAttribute(attr, value) print("Selected objects with attribute '{}' and value '{}'.".format(attr, value)) self.dispose() # Function to close the window when the close button is clicked def closeWindow(self, event): self.dispose() if __name__ == '__main__': # Launch the GUI window InputFrame()

Re: Searching a shape by inputting attribute values in a GUI window using Python.

JonasObertuefer — Wed, 11 Sep 2024 08:09:30 GMT

Hi @desert,

Thanks for sharing your script with the community.

While its true that currently advanced selections based on attributes can be done using the python scripting interface only, a basic search for attributes is available directly in the Scene Editor:

For more details about the feature checkout the online help:

CityEngine Help: Scene Editor: Additional layer options

If you are interested in advanced search capabilities through a GUI interface, I encourage you to create a new post in the Ideas forum!

Cheers
Jonas

Re: Searching a shape by inputting attribute values in a GUI window using Python.

desert — Wed, 11 Sep 2024 20:34:32 GMT

It seems I did something unnecessary without even thoroughly reading the manual I had checked before. I will carefully read the help section again. Thank you for pointing it out.

Re: Searching a shape by inputting attribute values in a GUI window using Python.

JonasObertuefer — Wed, 25 Sep 2024 09:41:58 GMT

I wouldn't say its unnecessary because you can do advanced filtering and selection using python. For instance using your script you can search for specific key/value pairs while the search bar in the Scene Editor will match everything with the entered name.