using Gtk
using GR
function update_canvas(widget)
canvas = widget[:canvas]
GR.clearws()
GR.setviewport(canvas[:allocation][:width], canvas[:allocation][:height])
GR.setwindow(0, 1, 0, 1)
GR.setspace(0, 0, 0, 0)
GR.axes(0.1, 0.1, 0.9, 0.9, 0, 0, 1, 1, 0.01)
GR.updatews()
end
function on_draw(widget, context)
update_canvas(widget)
return false
end
function on_button_clicked(button, widget)
update_canvas(widget)
end
function main()
Gtk.init(Ref())
window = Gtk.Window()
vbox = Gtk.VBox()
button = Gtk.Button("Update Canvas")
canvas = Gtk.DrawingArea()
vbox[:pack_start](button, false, false, 0)
vbox[:pack_start](canvas, true, true, 0)
window[:add](vbox)
window[:set_default_size](400, 400)
window[:show_all]()
button[:signal_connect]("clicked", on_button_clicked, canvas)
canvas[:signal_connect]("draw", on_draw)
Gtk.main()
end
main()Solution 1: Using Gtk and GR libraries
To update the canvas of a gr plot within gtk windows, we can make use of the Gtk and GR libraries in Julia. The Gtk library provides the necessary functions for creating a window and handling events, while the GR library allows us to create and update plots.
In this solution, we define several functions to handle the canvas update and drawing events. The update_canvas function is responsible for clearing the canvas, setting the viewport and window parameters, drawing the axes, and updating the workspace. The on_draw function is called whenever the canvas needs to be redrawn, and it calls the update_canvas function. The on_button_clicked function is triggered when the “Update Canvas” button is clicked, and it also calls the update_canvas function.
In the main function, we initialize the Gtk library, create a window and a vbox container, add a button and a canvas to the vbox, set the default size of the window, and connect the button click and canvas draw events to their respective functions. Finally, we start the Gtk main loop to handle events.
Solution 2: Using Gtk and Cairo libraries
Another way to update the canvas of a gr plot within gtk windows is by using the Gtk and Cairo libraries in Julia. The Gtk library provides the window and event handling functionalities, while the Cairo library allows us to draw on the canvas.
In this solution, we define similar functions as in the previous solution, but instead of using the GR library, we use the Cairo library to draw the plot. The update_canvas function is responsible for clearing the canvas, setting the viewport and window parameters, drawing the axes using Cairo functions, and updating the workspace. The on_draw function is called whenever the canvas needs to be redrawn, and it calls the update_canvas function. The on_button_clicked function is triggered when the “Update Canvas” button is clicked, and it also calls the update_canvas function.
In the main function, we initialize the Gtk library, create a window and a vbox container, add a button and a canvas to the vbox, set the default size of the window, and connect the button click and canvas draw events to their respective functions. Finally, we start the Gtk main loop to handle events.
Solution 3: Using Gtk and Plots libraries
A third approach to update the canvas of a gr plot within gtk windows is by using the Gtk and Plots libraries in Julia. The Gtk library provides the window and event handling functionalities, while the Plots library allows us to create and update plots.
In this solution, we define similar functions as in the previous solutions, but instead of using the GR or Cairo libraries, we use the Plots library to create and update the plot. The update_canvas function is responsible for clearing the canvas, setting the viewport and window parameters, drawing the axes using Plots functions, and updating the workspace. The on_draw function is called whenever the canvas needs to be redrawn, and it calls the update_canvas function. The on_button_clicked function is triggered when the “Update Canvas” button is clicked, and it also calls the update_canvas function.
In the main function, we initialize the Gtk library, create a window and a vbox container, add a button and a canvas to the vbox, set the default size of the window, and connect the button click and canvas draw events to their respective functions. Finally, we start the Gtk main loop to handle events.
Among the three options, the best solution depends on the specific requirements and preferences of the user. If the user is already familiar with the GR library and wants to stick to it, Solution 1 would be the most suitable. If the user prefers to use the Cairo library for drawing, Solution 2 would be a better choice. On the other hand, if the user prefers to use the Plots library for creating and updating plots, Solution 3 would be the most appropriate.
