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Create numeric_input helper in screenshot example

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Héctor Ramón Jiménez 2023-06-06 15:51:32 +02:00
parent 5ed9452877
commit 8820583cc0
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GPG key ID: 140CC052C94F138E
1 changed files with 54 additions and 44 deletions
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98
examples/screenshot/src/main.rs
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@ -25,10 +25,10 @@ struct Example {
saved_png_path: Option<Result<String, PngError>>,
png_saving: bool,
crop_error: Option<CropError>,
x_input_value: u32,
y_input_value: u32,
width_input_value: u32,
height_input_value: u32,
x_input_value: Option<u32>,
y_input_value: Option<u32>,
width_input_value: Option<u32>,
height_input_value: Option<u32>,
}
#[derive(Clone, Debug)]
@ -38,10 +38,10 @@ enum Message {
ScreenshotData(Screenshot),
Png,
PngSaved(Result<String, PngError>),
XInputChanged(String),
YInputChanged(String),
WidthInputChanged(String),
HeightInputChanged(String),
XInputChanged(Option<u32>),
YInputChanged(Option<u32>),
WidthInputChanged(Option<u32>),
HeightInputChanged(Option<u32>),
}
impl Application for Example {
@ -57,10 +57,10 @@ impl Application for Example {
saved_png_path: None,
png_saving: false,
crop_error: None,
x_input_value: 0,
y_input_value: 0,
width_input_value: 0,
height_input_value: 0,
x_input_value: None,
y_input_value: None,
width_input_value: None,
height_input_value: None,
},
Command::none(),
)
@ -91,33 +91,25 @@ impl Application for Example {
self.png_saving = false;
self.saved_png_path = Some(res);
}
Message::XInputChanged(new) => {
if let Ok(value) = new.parse::<u32>() {
self.x_input_value = value;
}
Message::XInputChanged(new_value) => {
self.x_input_value = new_value;
}
Message::YInputChanged(new) => {
if let Ok(value) = new.parse::<u32>() {
self.y_input_value = value;
}
Message::YInputChanged(new_value) => {
self.y_input_value = new_value;
}
Message::WidthInputChanged(new) => {
if let Ok(value) = new.parse::<u32>() {
self.width_input_value = value;
}
Message::WidthInputChanged(new_value) => {
self.width_input_value = new_value;
}
Message::HeightInputChanged(new) => {
if let Ok(value) = new.parse::<u32>() {
self.height_input_value = value;
}
Message::HeightInputChanged(new_value) => {
self.height_input_value = new_value;
}
Message::Crop => {
if let Some(screenshot) = &self.screenshot {
let cropped = screenshot.crop(Rectangle::<u32> {
x: self.x_input_value,
y: self.y_input_value,
width: self.width_input_value,
height: self.height_input_value,
x: self.x_input_value.unwrap_or(0),
y: self.y_input_value.unwrap_or(0),
width: self.width_input_value.unwrap_or(0),
height: self.height_input_value.unwrap_or(0),
});
match cropped {
@ -162,26 +154,20 @@ impl Application for Example {
let crop_origin_controls = row![
text("X:").vertical_alignment(Vertical::Center).width(14),
text_input("0", &format!("{}", self.x_input_value),)
.on_input(Message::XInputChanged)
.width(40),
numeric_input("0", self.x_input_value).map(Message::XInputChanged),
text("Y:").vertical_alignment(Vertical::Center).width(14),
text_input("0", &format!("{}", self.y_input_value),)
.on_input(Message::YInputChanged)
.width(40),
numeric_input("0", self.y_input_value).map(Message::YInputChanged)
]
.spacing(10)
.align_items(Alignment::Center);
let crop_dimension_controls = row![
text("W:").vertical_alignment(Vertical::Center).width(14),
text_input("0", &format!("{}", self.width_input_value),)
.on_input(Message::WidthInputChanged)
.width(40),
numeric_input("0", self.width_input_value)
.map(Message::WidthInputChanged),
text("H:").vertical_alignment(Vertical::Center).width(14),
text_input("0", &format!("{}", self.height_input_value),)
.on_input(Message::HeightInputChanged)
.width(40),
numeric_input("0", self.height_input_value)
.map(Message::HeightInputChanged)
]
.spacing(10)
.align_items(Alignment::Center);
@ -287,3 +273,27 @@ async fn save_to_png(screenshot: Screenshot) -> Result<String, PngError> {
#[derive(Clone, Debug)]
struct PngError(String);
fn numeric_input(
placeholder: &str,
value: Option<u32>,
) -> Element<'_, Option<u32>> {
text_input(
placeholder,
&value
.as_ref()
.map(ToString::to_string)
.unwrap_or_else(String::new),
)
.on_input(move |text| {
if text.is_empty() {
None
} else if let Ok(new_value) = text.parse() {
Some(new_value)
} else {
value
}
})
.width(40)
.into()
}