Improve the Text and line APIs

cyberpunk-slideshow/src/main.rs

@@ -1,6 +1,6 @@
 use std::{fs::File, io::Read, path::Path, rc::Rc, time::Duration};
 
-use cyberpunk::{AsymLine, GlowPen, Pen, Text};
+use cyberpunk::{AsymLine, AsymLineCutout, GlowPen, Pen, Text};
 use glib::Object;
 use gtk::{glib, prelude::*, subclass::prelude::*};
 use serde::{Deserialize, Serialize};
@@ -87,17 +87,33 @@ impl CyberScreen {
                     start_y: height as f64 / 2.,
                     start_length: 75.,
                     height: 50.,
-                    total_length: 200.,
+                    end_length: 75.,
                     invert: false,
                 }
                 .draw(&pen);
                 pen.stroke();
 
+                AsymLineCutout {
+                    orientation: gtk::Orientation::Horizontal,
+                    start_x: 50.,
+                    start_y: height as f64 / 4. * 3.,
+                    start_length: 75.,
+                    cutout_length: 15.,
+                    end_length: 75.,
+                    height: 15.,
+                    invert: true,
+                }.draw(&pen);
+                pen.stroke();
+
                 let tracery = pen.finish();
                 let _ = context.set_source(tracery);
                 let _ = context.paint();
 
-                Text::new("Test text".to_owned(), (0.7, 0., 1.)).draw(&context);
+                let text = Text::new("Test text".to_owned(), &context, 64.);
+                let text_extents = text.extents();
+                context.move_to(20., text_extents.height() + 40.);
+                context.set_source_rgb(0.7, 0., 1.);
+                text.draw();
             }
         });
 

cyberpunk/src/lib.rs

@@ -10,19 +10,19 @@ use std::{
     time::{Duration, Instant},
 };
 
-struct AsymLineCutout {
+pub struct AsymLineCutout {
-    orientation: gtk::Orientation,
+    pub orientation: gtk::Orientation,
-    start_x: f64,
+    pub start_x: f64,
-    start_y: f64,
+    pub start_y: f64,
-    start_length: f64,
+    pub start_length: f64,
-    total_length: f64,
+    pub cutout_length: f64,
-    cutout_length: f64,
+    pub end_length: f64,
-    height: f64,
+    pub height: f64,
-    invert: bool,
+    pub invert: bool,
 }
 
 impl AsymLineCutout {
-    fn draw(&self, pen: &impl Pen) {
+    pub fn draw(&self, pen: &impl Pen) {
         let dodge = if self.invert {
             self.height
         } else {
@@ -48,7 +48,15 @@ impl AsymLineCutout {
                         + (self.height / 2.),
                     self.start_y + dodge / 2.,
                 );
-                pen.line_to(self.total_length, self.start_y + dodge / 2.);
+                pen.line_to(
+                    self.start_x
+                        + self.start_length
+                        + self.height
+                        + self.cutout_length
+                        + (self.height / 2.)
+                        + self.end_length,
+                    self.start_y + dodge / 2.,
+                );
             }
             gtk::Orientation::Vertical => {
                 pen.move_to(self.start_x, self.start_y);
@@ -69,7 +77,15 @@ impl AsymLineCutout {
                         + self.cutout_length
                         + (self.height / 2.),
                 );
-                pen.line_to(self.start_x + dodge / 2., self.total_length);
+                pen.line_to(
+                    self.start_x + dodge / 2.,
+                    self.start_y
+                        + self.start_length
+                        + self.height
+                        + self.cutout_length
+                        + (self.height / 2.)
+                        + self.end_length,
+                );
             }
             _ => panic!("unknown orientation"),
         }
@@ -93,7 +109,7 @@ pub struct AsymLine {
     pub height: f64,
 
     // Total length of the entire line.
-    pub total_length: f64,
+    pub end_length: f64,
 
     // When normal, the angle dodge is upwards. When inverted, the angle dodge is downwards.
     pub invert: bool,
@@ -114,7 +130,10 @@ impl AsymLine {
                     self.start_x + self.start_length + self.height,
                     self.start_y + dodge,
                 );
-                pen.line_to(self.start_x + self.total_length, self.start_y + dodge);
+                pen.line_to(
+                    self.start_x + self.start_length + self.height + self.end_length,
+                    self.start_y + dodge,
+                );
             }
             gtk::Orientation::Vertical => {}
             _ => panic!("unknown orientation"),
@@ -238,25 +257,23 @@ impl Pen for GlowPen {
     }
 }
 
-pub struct Text {
+pub struct Text<'a> {
     content: String,
-    color: (f64, f64, f64),
+    context: &'a Context,
 }
 
-impl Text {
+impl<'a> Text<'a> {
-    pub fn new(content: String, color: (f64, f64, f64)) -> Self {
+    pub fn new(content: String, context: &'a Context, size: f64) -> Self {
-
-        Self{ content, color }
-    }
-
-    pub fn draw(&self, context: &Context) {
         context.select_font_face("Alegreya Sans SC", FontSlant::Normal, FontWeight::Bold);
-        context.set_font_size(64.);
+        context.set_font_size(size);
+        Self { content, context }
+    }
 
-        let extents = context.text_extents(&self.content).unwrap();
+    pub fn extents(&self) -> TextExtents {
-        context.move_to(20., extents.height() + 20.);
+        self.context.text_extents(&self.content).unwrap()
+    }
 
-        context.set_source_rgb(self.color.0, self.color.1, self.color.2);
+    pub fn draw(&self) {
-        let _ = context.show_text(&self.content);
+        let _ = self.context.show_text(&self.content);
     }
 }