Added bar plot support

implot-examples/examples/bar_plots.rs

@@ -0,0 +1,76 @@
+//! This example demonstrates how bar plots are to be used. For more general
+//! features of the libray, see the line_plots example.
+
+use imgui::{im_str, CollapsingHeader, Condition, Ui, Window};
+use implot::{push_style_var_f32, push_style_var_u32, Marker, Plot, PlotBars, StyleVar};
+
+mod support;
+
+fn show_basic_vertical_plot(ui: &Ui) {
+    ui.text(im_str!("This header shows a simple vertical bar plot."));
+    let content_width = ui.window_content_region_width();
+    Plot::new("Vertical bar plot")
+        // The size call could also be omitted, though the defaults don't consider window
+        // width, which is why we're not doing so here.
+        .size(content_width, 300.0)
+        .build(|| {
+            // If this is called outside a plot build callback, the program will panic.
+            let axis_positions = vec![0.2, 0.4, 0.6, 0.8];
+            let values = vec![0.1, 0.2, 0.3, 0.4];
+            PlotBars::new("legend label")
+                .with_bar_width(0.1)
+                .plot(&axis_positions, &values);
+        });
+}
+
+fn show_basic_horizontal_plot(ui: &Ui) {
+    ui.text(im_str!("This header shows a simple horizontal bar plot."));
+    let content_width = ui.window_content_region_width();
+    Plot::new("Horizontal bar plot")
+        // The size call could also be omitted, though the defaults don't consider window
+        // width, which is why we're not doing so here.
+        .size(content_width, 300.0)
+        .build(|| {
+            // If this is called outside a plot build callback, the program will panic.
+            let axis_positions = vec![0.2, 0.4, 0.6, 0.8];
+            let values = vec![0.1, 0.2, 0.3, 0.4];
+            PlotBars::new("legend label")
+                .with_bar_width(0.05)
+                .with_horizontal_bars()
+                .plot(&axis_positions, &values);
+        });
+}
+
+fn main() {
+    let system = support::init(file!());
+    let mut showing_demo = false;
+    system.main_loop(move |_, ui| {
+        Window::new(im_str!("Line plots example"))
+            .size([430.0, 450.0], Condition::FirstUseEver)
+            .build(ui, || {
+                ui.text(im_str!("Hello from implot-rs!"));
+                ui.text_wrapped(im_str!(
+                    "The headers here demo the bar plotting features of the library. \
+                    Have a look at the example source code to see how they are implemented.\n\
+                    Check out the demo from ImPlot itself first \
+                    (by enabling the 'Show demo' checkbox) for instructions \
+                    on how to interact with ImPlot plots."
+                ));
+
+                ui.checkbox(im_str!("Show demo"), &mut showing_demo);
+
+                // Show individual examples in collapsed headers
+                if CollapsingHeader::new(im_str!("Basic vertical plot")).build(&ui) {
+                    show_basic_vertical_plot(&ui);
+                }
+
+                if CollapsingHeader::new(im_str!("Basic horizontal plot")).build(&ui) {
+                    show_basic_horizontal_plot(&ui);
+                }
+            });
+
+        if showing_demo {
+            implot::show_demo_window(&mut showing_demo);
+        }
+    });
+}

implot-examples/examples/scatter_plots.rs

@@ -8,7 +8,7 @@ mod support;
 
 fn show_basic_plot(ui: &Ui) {
     ui.text(im_str!(
-        "This header just plots a line with as little code as possible."
+        "This header just draws a scatter plot with as little code as possible."
     ));
     let content_width = ui.window_content_region_width();
     Plot::new("Simple scatter plot")