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Add support for hyperlinks

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This commit is contained in:
Emil Ernerfeldt
2020-04-23 19:15:17 +02:00
parent 25b06a6ff0
commit b39555bb23
18 changed files with 211 additions and 55 deletions
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58
emigui/src/widgets.rs
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@@ -59,6 +59,62 @@ impl Widget for Label {
// ----------------------------------------------------------------------------
pub struct Hyperlink {
url: String,
text: String,
}
impl Hyperlink {
pub fn new(url: impl Into<String>) -> Self {
let url = url.into();
Self {
text: url.clone(),
url,
}
}
}
impl Widget for Hyperlink {
fn add_to(self, region: &mut Region) -> GuiResponse {
let color = color::LIGHT_BLUE;
let text_style = TextStyle::Body;
let id = region.make_child_id(&self.url);
let font = &region.fonts()[text_style];
let line_spacing = font.line_spacing();
// TODO: underline
let (text, text_size) = font.layout_multiline(&self.text, region.available_width());
let interact = region.reserve_space(text_size, Some(id));
if interact.hovered {
region.ctx().output.lock().cursor_icon = CursorIcon::PointingHand;
}
if interact.clicked {
region.ctx().output.lock().open_url = Some(self.url.clone());
}
if interact.hovered {
// Underline:
for fragment in &text {
let pos = interact.rect.min();
let y = pos.y + fragment.y_offset + line_spacing;
let y = region.round_to_pixel(y);
let min_x = pos.x + fragment.min_x();
let max_x = pos.x + fragment.max_x();
region.add_paint_cmd(PaintCmd::Line {
points: vec![pos2(min_x, y), pos2(max_x, y)],
color,
width: region.style().line_width,
});
}
}
region.add_text(interact.rect.min(), text_style, text, Some(color));
region.response(interact)
}
}
// ----------------------------------------------------------------------------
pub struct Button {
text: String,
text_color: Option<Color>,
@@ -416,7 +472,7 @@ impl<'a> Widget for Slider<'a> {
let value = self.get_value_f32();
let rect = interact.rect;
let rail_radius = (height / 8.0).round().max(2.0);
let rail_radius = region.round_to_pixel((height / 8.0).max(2.0));
let rail_rect = Rect::from_min_max(
pos2(interact.rect.left(), rect.center().y - rail_radius),
pos2(interact.rect.right(), rect.center().y + rail_radius),