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widgets: Allow widgets to fill remaining space

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This is implemented by propagating the expected remaining space to all
widget draw calls. It is not currently as smart as it could be, but it
works well enough to let the last widget in a row/column fill things.

BarWidget-type widgets and the Launcher widget now fill remaining space
if their length is set to 0.
This commit is contained in:
Kenny Levinsen
2020-06-14 17:01:42 +02:00
parent 2f61da8690
commit 24ec63a178
8 changed files with 73 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/widget.rs
+44 -14
View File
@@ -56,6 +56,7 @@ pub trait Widget {
&mut self,
ctx: &mut DrawContext,
pos: (u32, u32),
expansion: (u32, u32),
) -> Result<DrawReport, ::std::io::Error>;
fn keyboard_input(
@@ -115,16 +116,20 @@ impl<'a> Widget for VerticalLayout<'a> {
&mut self,
ctx: &mut DrawContext,
pos: (u32, u32),
expansion: (u32, u32),
) -> Result<DrawReport, ::std::io::Error> {
let mut offset = pos.1;
let mut offset = 0;
let mut width = 0;
let mut damage = Vec::new();
let mut full_damage = false;
for child in &mut self.children {
let mut report = child.draw(ctx, (pos.0, offset))?;
let mut report = child.draw(
ctx,
(pos.0, offset + pos.1),
(expansion.0, expansion.1 - offset),
)?;
if report.width > width {
width = report.width;
width = report.width
}
offset += report.height;
full_damage |= report.full_damage;
@@ -133,7 +138,7 @@ impl<'a> Widget for VerticalLayout<'a> {
Ok(DrawReport {
width,
height: offset - pos.1,
height: offset,
damage,
full_damage,
})
@@ -189,6 +194,19 @@ impl<'a> HorizontalLayout<'a> {
pub fn new(children: Vec<Box<dyn Widget + Send + 'a>>) -> Box<HorizontalLayout> {
Box::new(HorizontalLayout { children })
}
fn height(&self) -> u32 {
let mut height = 0;
for child in &self.children {
let size = child.size();
if size.1 > height {
height = size.1;
}
}
height
}
}
impl<'a> Widget for HorizontalLayout<'a> {
@@ -226,16 +244,20 @@ impl<'a> Widget for HorizontalLayout<'a> {
&mut self,
ctx: &mut DrawContext,
pos: (u32, u32),
expansion: (u32, u32),
) -> Result<DrawReport, ::std::io::Error> {
let mut offset = pos.0;
let mut offset = 0;
let mut height = 0;
let mut damage = Vec::new();
let mut full_damage = false;
for child in &mut self.children {
let mut report = child.draw(ctx, (offset, pos.1))?;
let mut report = child.draw(
ctx,
(offset + pos.0, pos.1),
(expansion.0 - offset, expansion.1),
)?;
if report.height > height {
height = report.height;
height = report.height
}
offset += report.width;
full_damage |= report.full_damage;
@@ -243,7 +265,7 @@ impl<'a> Widget for HorizontalLayout<'a> {
}
Ok(DrawReport {
width: offset - pos.0,
width: offset,
height,
damage,
full_damage,
@@ -327,10 +349,17 @@ impl<'a> Widget for Margin<'a> {
&mut self,
ctx: &mut DrawContext,
pos: (u32, u32),
expansion: (u32, u32),
) -> Result<DrawReport, ::std::io::Error> {
let report = self
.child
.draw(ctx, (pos.0 + self.margins.0, pos.1 + self.margins.2))?;
let expansion = (
expansion.0 - self.margins.0 - self.margins.1,
expansion.1 - self.margins.2 - self.margins.3,
);
let report = self.child.draw(
ctx,
(pos.0 + self.margins.0, pos.1 + self.margins.2),
expansion,
)?;
Ok(DrawReport {
width: report.width + self.margins.0 + self.margins.1,
height: report.height + self.margins.2 + self.margins.3,
@@ -397,8 +426,9 @@ impl<'a> Widget for Fixed<'a> {
&mut self,
ctx: &mut DrawContext,
pos: (u32, u32),
expansion: (u32, u32),
) -> Result<DrawReport, ::std::io::Error> {
let report = self.child.draw(ctx, pos)?;
let report = self.child.draw(ctx, pos, expansion)?;
Ok(DrawReport {
width: self.size.0,
height: self.size.1,