implot-rs/implot-examples/examples/hello_world.rs

// This is a somewhat messy example that currently just gets used to test out functionality as it
// is built. It will be taken apart into separate examples with clearer demo purposes later.

use imgui::*;
use implot::{
    get_plot_limits, get_plot_mouse_position, get_plot_query, is_plot_hovered, is_plot_queried,
    push_style_color, push_style_var_f32, push_style_var_u32,
};
use implot::{
    AxisFlags, ImPlotLimits, ImPlotPoint, ImPlotRange, Marker, Plot, PlotColorElement, PlotFlags,
    PlotLine, PlotText, StyleVar,
};

mod support;

fn main() {
    let system = support::init(file!());
    let mut showing_demo = false;
    system.main_loop(move |_, ui| {
        // Create the window from time imgui example, just... with an added plot
        Window::new(im_str!("Hello world"))
            .size([430.0, 450.0], Condition::FirstUseEver)
            .build(ui, || {
                ui.text(im_str!("Hello from implot-rs!"));
                ui.separator();
                let mouse_pos = ui.io().mouse_pos;
                ui.text(format!(
                    "Mouse Position: ({:.1},{:.1})",
                    mouse_pos[0], mouse_pos[1]
                ));
                ui.checkbox(im_str!("Show demo"), &mut showing_demo);

                // Create some containers for exfiltrating data from the closure below
                let mut hover_pos: Option<ImPlotPoint> = None;
                let mut plot_limits: Option<ImPlotLimits> = None;
                let mut query_limits: Option<ImPlotLimits> = None;

                // Draw a plot
                let style = push_style_color(&PlotColorElement::PlotBg, 1.0, 1.0, 1.0, 0.2);
                Plot::new("Demo plot")
                    .size(400.0, 300.0)
                    .x_label("awesome x label")
                    .y_label("awesome y label")
                    .x_limits(&ImPlotRange { Min: 0.0, Max: 6.0 }, Condition::FirstUseEver)
                    .y_limits(
                        &ImPlotRange {
                            Min: -1.0,
                            Max: 3.0,
                        },
                        Condition::FirstUseEver,
                    )
                    .with_plot_flags(&(PlotFlags::DEFAULT))
                    .with_y_axis_flags(&(AxisFlags::DEFAULT | AxisFlags::INVERT))
                    .build(|| {
                        // Line plotting
                        let markerchoice =
                            push_style_var_u32(&StyleVar::Marker, Marker::CROSS.bits());
                        PlotLine::new("Left eye").plot(&vec![2.0, 2.0], &vec![2.0, 1.0]);
                        markerchoice.pop();

                        let lineweight = push_style_var_f32(&StyleVar::LineWeight, 5.0);
                        PlotLine::new("Right eye").plot(&vec![4.0, 4.0], &vec![2.0, 1.0]);
                        lineweight.pop();

                        let x_values = vec![1.0, 2.0, 4.0, 5.0];
                        let y_values = vec![1.0, 0.0, 0.0, 1.0];
                        PlotLine::new("Mouth").plot(&x_values, &y_values);

                        // Text
                        PlotText::new("Text!").plot(2.0, 2.0, false);
                        PlotText::new("Text with offset!")
                            .with_pixel_offset(10.0, 30.0)
                            .plot(2.0, 2.0, false);
                        PlotText::new("Vertical Text!").plot(0.1, 2.5, true);
                        if is_plot_hovered() {
                            hover_pos = Some(get_plot_mouse_position());
                        }

                        if is_plot_queried() {
                            query_limits = Some(get_plot_query());
                        }
                        plot_limits = Some(get_plot_limits());
                    });

                // Print some previously-exfiltrated info. This is because calling
                // things like is_plot_hovered or get_plot_mouse_position() outside
                // of an actual Plot is not allowed.
                if let Some(pos) = hover_pos {
                    ui.text(im_str!("hovered at {}, {}", pos.x, pos.y));
                }
                if let Some(limits) = plot_limits {
                    ui.text(im_str!("Plot limits are {:#?}", limits));
                }
                if let Some(query) = query_limits {
                    ui.text(im_str!("Query limits are {:#?}", query));
                }
                style.pop();
            });

        if showing_demo {
            implot::show_demo_window(&mut showing_demo);
        }
    });
}