About fileOpenSaveDialogExample

Learning Objectives

This example demonstrates how to use the file dialog to select and save files from and to directories of your choosing. It also illustrates how to manipulate the pixels of the loaded image.

In the code, pay attention to:

• Use of ofSystemLoadDialog to invoke the system level file dialog
• Use of ofFileDialogResult to store the result of the invocation
• Use of ofFileDialogResult.getPath() to retrieve the path to the file selected
• Determing the file extension using file.getExtension()
• Saving the file using ofSystemSaveDialog()
• Getting the color of a pixel ofColor color = image.getColor(x, y);
• Sorting function for color based on brightness sortColorFunction

Expected Behavior

When launching this application you will be able to select an image to load by pressing the spacebar key which will bring up the system level file selection dialog. Once loaded, the pixels of that image are catalogued and then sorted based on color to create a new image. The manipulated image can then be saved to another location using the s key, which will invoke the system level file save dialog.

When the key spacebar is pressed:

• The application will invoke the system level file selection dialog from which you can select what image you want to load into the application. Once selected, the application will load it and it will be shown in the application.

When the key s is pressed:

• The application will invoke a system level file save dialog, where you can select where to save the manipulated image in the application. Once a destination has been selected, it will write the file to that location.

Instructions for use:

• Load an image file ( png or jpg ) by pressing spacebar and selecting an image to load
• Save the loaded image by pressing s and selecting the destination to write that file, which will be a manipulated version of the original.

Other classes used in this file

This Example uses no other classes.