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Add title to views::Panel
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3d81ad92ec
commit
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@ -1,22 +1,91 @@
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use align::*;
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use event::{Event, EventResult};
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use rect::Rect;
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use theme::ColorStyle;
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use unicode_width::UnicodeWidthStr;
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use vec::Vec2;
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use view::{View, ViewWrapper};
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use Printer;
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use With;
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/// Draws a border around a wrapped view.
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#[derive(Debug)]
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pub struct Panel<V: View> {
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// Inner view
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view: V,
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// Possibly empty title.
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title: String,
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// Where to put the title position
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title_position: HAlign,
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// `true` when we needs to relayout
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invalidated: bool,
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}
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impl<V: View> Panel<V> {
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/// Creates a new panel around the given view.
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pub fn new(view: V) -> Self {
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Panel { view }
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Panel {
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view,
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title: String::new(),
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title_position: HAlign::Center,
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invalidated: true,
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}
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}
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inner_getters!(self.view: V);
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/// Sets the title of the dialog.
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///
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/// If not empty, it will be visible at the top.
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pub fn title<S: Into<String>>(self, label: S) -> Self {
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self.with(|s| s.set_title(label))
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}
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/// Sets the title of the dialog.
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pub fn set_title<S: Into<String>>(&mut self, label: S) {
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self.title = label.into();
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self.invalidate();
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}
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/// Sets the horizontal position of the title in the dialog.
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/// The default position is `HAlign::Center`
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pub fn title_position(self, align: HAlign) -> Self {
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self.with(|s| s.set_title_position(align))
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}
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/// Sets the horizontal position of the title in the dialog.
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/// The default position is `HAlign::Center`
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pub fn set_title_position(&mut self, align: HAlign) {
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self.title_position = align;
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}
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fn draw_title(&self, printer: &Printer) {
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if !self.title.is_empty() {
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let len = self.title.width();
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if len + 4 > printer.size.x {
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return;
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}
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let spacing = 3; //minimum distance to borders
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let x = spacing + self
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.title_position
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.get_offset(len, printer.size.x - 2 * spacing);
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printer.with_high_border(false, |printer| {
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printer.print((x - 2, 0), "┤ ");
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printer.print((x + len, 0), " ├");
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});
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printer.with_color(ColorStyle::title_primary(), |p| {
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p.print((x, 0), &self.title)
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});
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}
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}
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fn invalidate(&mut self) {
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self.invalidated = true;
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}
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}
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impl<V: View> ViewWrapper for Panel<V> {
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@ -35,6 +104,8 @@ impl<V: View> ViewWrapper for Panel<V> {
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fn wrap_draw(&self, printer: &Printer) {
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printer.print_box((0, 0), printer.size, true);
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self.draw_title(&printer);
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let printer = printer.offset((1, 1)).shrinked((1, 1));
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self.view.draw(&printer);
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}
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@ -47,4 +118,9 @@ impl<V: View> ViewWrapper for Panel<V> {
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let inner_size = size.saturating_sub((2, 2));
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self.view.important_area(inner_size) + (1, 1)
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}
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fn wrap_needs_relayout(&self) -> bool {
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self.invalidated
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|| self.with_view(|v| v.needs_relayout()).unwrap_or(true)
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}
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}
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