获取不到数据时不更新文本

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "USB-Screen"
-version = "1.1.3"
+version = "1.1.4"
 edition = "2021"
 
 [features]

build-x86_64_linux.sh

@@ -6,11 +6,13 @@
 # default = ["editor", "v4l-webcam", usb-serial]
 #
 # cargo install cross --git https://github.com/cross-rs/cross
-# cross build --target x86_64-unknown-linux-musl --release
+# cross build --target x86_64-unknown-linux-gnu --release
+bash
+cargo build --target x86_64-unknown-linux-gnu --release
 
 # https://github.com/johnthagen/min-sized-rust
 # rustup component add rust-src --toolchain nightly
-RUSTFLAGS="-Zlocation-detail=none" cross +nightly build -Z build-std=std,panic_abort \
-  -Z build-std-features=panic_immediate_abort \
-  -Z build-std-features="optimize_for_size" \
-  --target x86_64-unknown-linux-gnu --release
+# RUSTFLAGS="-Zlocation-detail=none" cross +nightly build -Z build-std=std,panic_abort \
+#   -Z build-std-features=panic_immediate_abort \
+#   -Z build-std-features="optimize_for_size" \
+#   --target x86_64-unknown-linux-gnu --release

src/usb_screen.rs

@@ -31,14 +31,14 @@ impl UsbScreen{
         match self{
             UsbScreen::USBRaw((info, interface)) => {
                 if img.width() <= info.width as u32 && img.height() <= info.height as u32{
-                    let _ = draw_rgb_image(x, y, img, interface);
+                    draw_rgb_image(x, y, img, interface)?;
                 }
             }
 
             #[cfg(feature = "usb-serial")]
             UsbScreen::USBSerial((info, port)) => {
                 if img.width() <= info.width as u32 && img.height() <= info.height as u32{
-                    let _ = draw_rgb_image_serial(x, y, img, port.as_mut());
+                    draw_rgb_image_serial(x, y, img, port.as_mut())?;
                 }
             }
         }

src/widgets.rs

@@ -266,7 +266,7 @@ impl Widget for TextWidget {
                 "lunar_year" => Some(monitor::lunar_year()),
                 "lunar_date" => Some(monitor::lunar_date()),
                 "weather" => match monitor::weather_info() {
-                    None => Some(self.text.to_string()),
+                    None => Some(monitor::EMPTY_STRING.to_string()),
                     Some(w) => {
                         match self.tag1.as_str() {
                             "1" => Some(format!("{}", w.station.city)),         //城市
@@ -299,7 +299,7 @@ impl Widget for TextWidget {
                 "transmitted_speed" => monitor::network_speed_per_sec().map(|(_r, t)| t),
                 _ => None,
             } {
-                if self.text != text {
+                if self.text != text && text != monitor::EMPTY_STRING {
                     self.text = text;
                 }
             }