Add tests for layout and visuals of most egui widgets (#6752)
This is mostly in preparation for #5830 where I want to ensure that I don't introduce any regressions
This commit is contained in:
Lucas Meurer
GitHub
parent
0f1d6c2818
commit
501905b60d
10
Cargo.lock
10
Cargo.lock
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@ -1423,6 +1423,16 @@ dependencies = [
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"wgpu",
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]
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[[package]]
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name = "egui_tests"
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version = "0.31.1"
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dependencies = [
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"egui",
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"egui_extras",
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"egui_kittest",
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"image",
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]
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[[package]]
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name = "ehttp"
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version = "0.5.0"
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@ -274,6 +274,7 @@ impl<'a, State> Harness<'a, State> {
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///
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/// See also:
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/// - [`Harness::try_run`].
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/// - [`Harness::try_run_realtime`].
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/// - [`Harness::run_ok`].
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/// - [`Harness::step`].
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/// - [`Harness::run_steps`].
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@ -287,6 +288,27 @@ impl<'a, State> Harness<'a, State> {
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}
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}
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fn _try_run(&mut self, sleep: bool) -> Result<u64, ExceededMaxStepsError> {
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let mut steps = 0;
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loop {
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steps += 1;
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self.step();
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// We only care about immediate repaints
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if self.root_viewport_output().repaint_delay != Duration::ZERO {
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break;
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} else if sleep {
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std::thread::sleep(Duration::from_secs_f32(self.step_dt));
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}
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if steps > self.max_steps {
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return Err(ExceededMaxStepsError {
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max_steps: self.max_steps,
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repaint_causes: self.ctx.repaint_causes(),
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});
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}
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}
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Ok(steps)
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}
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/// Run until
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/// - all animations are done
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/// - no more repaints are requested
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@ -302,23 +324,9 @@ impl<'a, State> Harness<'a, State> {
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/// - [`Harness::run_ok`].
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/// - [`Harness::step`].
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/// - [`Harness::run_steps`].
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/// - [`Harness::try_run_realtime`].
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pub fn try_run(&mut self) -> Result<u64, ExceededMaxStepsError> {
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let mut steps = 0;
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loop {
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steps += 1;
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self.step();
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// We only care about immediate repaints
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if self.root_viewport_output().repaint_delay != Duration::ZERO {
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break;
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}
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if steps > self.max_steps {
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return Err(ExceededMaxStepsError {
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max_steps: self.max_steps,
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repaint_causes: self.ctx.repaint_causes(),
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});
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}
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}
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Ok(steps)
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self._try_run(false)
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}
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/// Run until
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@ -333,10 +341,34 @@ impl<'a, State> Harness<'a, State> {
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/// - [`Harness::try_run`].
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/// - [`Harness::step`].
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/// - [`Harness::run_steps`].
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/// - [`Harness::try_run_realtime`].
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pub fn run_ok(&mut self) -> Option<u64> {
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self.try_run().ok()
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}
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/// Run multiple frames, sleeping for [`HarnessBuilder::with_step_dt`] between frames.
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///
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/// This is useful to e.g. wait for an async operation to complete (e.g. loading of images).
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/// Runs until
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/// - all animations are done
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/// - no more repaints are requested
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/// - the maximum number of steps is reached (See [`HarnessBuilder::with_max_steps`])
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///
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/// Returns the number of steps that were run.
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///
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/// # Errors
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/// Returns an error if the maximum number of steps is exceeded.
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///
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/// See also:
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/// - [`Harness::run`].
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/// - [`Harness::run_ok`].
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/// - [`Harness::step`].
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/// - [`Harness::run_steps`].
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/// - [`Harness::try_run`].
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pub fn try_run_realtime(&mut self) -> Result<u64, ExceededMaxStepsError> {
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self._try_run(true)
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}
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/// Run a number of steps.
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/// Equivalent to calling [`Harness::step`] x times.
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pub fn run_steps(&mut self, steps: usize) {
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@ -0,0 +1,15 @@
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[package]
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name = "egui_tests"
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edition.workspace = true
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license.workspace = true
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rust-version.workspace = true
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version.workspace = true
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[dev-dependencies]
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egui = { workspace = true, default-features = true }
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egui_kittest = { workspace = true, features = ["snapshot", "wgpu"] }
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egui_extras = { workspace = true, features = ["image"]}
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image = { workspace = true, features = ["png"] }
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[lints]
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workspace = true
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:ccd7bdd86e587bcf0577c92e10ed7c3c35195e37df109a84554ceb30a434768d
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size 315482
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:975c279d6da2a2cb000df72bf5d9f3bdd200bb20adc00e29e8fd9ed4d2c6f6b1
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size 340923
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:ad14068e60fa678ee749925dd3713ee2b12a83ec1bca9c413bdeb9bc27d8ac20
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size 407795
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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size 385129
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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size 415016
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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size 355550
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version https://git-lfs.github.com/spec/v1
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size 388912
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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size 336722
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:465e34d94bf734a2a7a1e8e4a71ce64c908c737a7c4fa2a6f812351f2aaa6808
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size 233018
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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oid sha256:99f64e581b97df6694cb7c85ee7728a955e3c1a851ab660e8b6091eee1885bbe
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size 9719
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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version https://git-lfs.github.com/spec/v1
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size 12914
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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size 13445
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@ -0,0 +1,3 @@
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|||
version https://git-lfs.github.com/spec/v1
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size 7306
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@ -0,0 +1,3 @@
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version https://git-lfs.github.com/spec/v1
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||||
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size 11076
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@ -0,0 +1,3 @@
|
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version https://git-lfs.github.com/spec/v1
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||||
size 11700
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@ -0,0 +1,3 @@
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|||
version https://git-lfs.github.com/spec/v1
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||||
oid sha256:eed80e11dd3ba478217cf004654934214b522ea666074e023dda9a323473615a
|
||||
size 12452
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||||
|
|
@ -0,0 +1,3 @@
|
|||
version https://git-lfs.github.com/spec/v1
|
||||
oid sha256:0ef91dfedc74cae59099bce32b2e42cb04649e84442e8010282a9c1ff2a7f2c8
|
||||
size 12469
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||||
|
|
@ -0,0 +1,3 @@
|
|||
version https://git-lfs.github.com/spec/v1
|
||||
oid sha256:1892358a4552af3f529141d314cd18e4cf55a629d870798278a5470e3e0a8a94
|
||||
size 11030
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|
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@ -0,0 +1,3 @@
|
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version https://git-lfs.github.com/spec/v1
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oid sha256:7300a0b88d4fdb6c1e543bfaf50e8964b2f84aaaf8197267b671d0cf3c8da30a
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size 7033
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@ -0,0 +1,370 @@
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use egui::load::SizedTexture;
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use egui::{
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include_image, Align, Button, Color32, ColorImage, Direction, DragValue, Event, Grid, Layout,
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PointerButton, Pos2, Response, Slider, Stroke, StrokeKind, TextWrapMode, TextureHandle,
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TextureOptions, Ui, UiBuilder, Vec2, Widget,
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};
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use egui_kittest::kittest::{by, Node, Queryable};
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use egui_kittest::{Harness, SnapshotResult, SnapshotResults};
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#[test]
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fn widget_tests() {
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let mut results = SnapshotResults::new();
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test_widget("button", |ui| ui.button("Button"), &mut results);
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test_widget(
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"button_image",
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|ui| {
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Button::image_and_text(
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include_image!("../../../crates/eframe/data/icon.png"),
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"Button",
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)
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.ui(ui)
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},
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&mut results,
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);
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test_widget(
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"button_image_shortcut",
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|ui| {
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Button::image_and_text(
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include_image!("../../../crates/eframe/data/icon.png"),
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"Open",
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)
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.shortcut_text("⌘O")
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.ui(ui)
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},
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&mut results,
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);
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results.add(VisualTests::test("button_image_shortcut_selected", |ui| {
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Button::image_and_text(
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include_image!("../../../crates/eframe/data/icon.png"),
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"Open",
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)
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.shortcut_text("⌘O")
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.selected(true)
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.ui(ui)
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}));
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test_widget(
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"selectable_value",
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|ui| ui.selectable_label(false, "Selectable"),
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&mut results,
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);
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test_widget(
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"selectable_value_selected",
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|ui| ui.selectable_label(true, "Selectable"),
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&mut results,
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);
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test_widget(
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"checkbox",
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|ui| ui.checkbox(&mut false, "Checkbox"),
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&mut results,
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);
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test_widget(
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"checkbox_checked",
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|ui| ui.checkbox(&mut true, "Checkbox"),
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&mut results,
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);
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test_widget("radio", |ui| ui.radio(false, "Radio"), &mut results);
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test_widget("radio_checked", |ui| ui.radio(true, "Radio"), &mut results);
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test_widget(
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"drag_value",
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|ui| DragValue::new(&mut 12.0).ui(ui),
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&mut results,
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);
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test_widget(
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"text_edit",
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|ui| {
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ui.spacing_mut().text_edit_width = 45.0;
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ui.text_edit_singleline(&mut "Hi!".to_owned())
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},
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&mut results,
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);
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test_widget(
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"slider",
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|ui| {
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ui.spacing_mut().slider_width = 45.0;
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Slider::new(&mut 12.0, 0.0..=100.0).ui(ui)
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},
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&mut results,
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);
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}
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fn test_widget(name: &str, mut w: impl FnMut(&mut Ui) -> Response, results: &mut SnapshotResults) {
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results.add(test_widget_layout(name, &mut w));
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results.add(VisualTests::test(name, &mut w));
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}
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fn test_widget_layout(name: &str, mut w: impl FnMut(&mut Ui) -> Response) -> SnapshotResult {
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let test_size = Vec2::new(110.0, 45.0);
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struct Row {
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main_dir: Direction,
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main_align: Align,
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main_justify: bool,
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}
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struct Col {
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cross_align: Align,
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cross_justify: bool,
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}
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let mut rows = Vec::new();
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let mut cols = Vec::new();
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for main_justify in [false, true] {
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for main_dir in [
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Direction::LeftToRight,
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Direction::TopDown,
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Direction::RightToLeft,
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Direction::BottomUp,
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] {
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for main_align in [Align::Min, Align::Center, Align::Max] {
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rows.push(Row {
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main_dir,
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main_align,
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main_justify,
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});
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}
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}
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}
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for cross_justify in [false, true] {
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for cross_align in [Align::Min, Align::Center, Align::Max] {
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cols.push(Col {
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cross_align,
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cross_justify,
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});
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}
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}
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let mut harness = Harness::builder().build_ui(|ui| {
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egui_extras::install_image_loaders(ui.ctx());
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{
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let mut wrap_test_size = test_size;
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wrap_test_size.x /= 3.0;
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ui.heading("Wrapping");
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let modes = [
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TextWrapMode::Extend,
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TextWrapMode::Truncate,
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TextWrapMode::Wrap,
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];
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Grid::new("wrapping")
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.spacing(Vec2::new(test_size.x / 2.0, 4.0))
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.show(ui, |ui| {
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for mode in &modes {
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ui.label(format!("{mode:?}"));
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}
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ui.end_row();
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for mode in &modes {
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let (_, rect) = ui.allocate_space(wrap_test_size);
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let mut child_ui = ui.new_child(UiBuilder::new().max_rect(rect));
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child_ui.style_mut().wrap_mode = Some(*mode);
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w(&mut child_ui);
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ui.painter().rect_stroke(
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rect,
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0.0,
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Stroke::new(1.0, Color32::WHITE),
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StrokeKind::Outside,
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);
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}
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});
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}
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ui.heading("Layout");
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Grid::new("layout").striped(true).show(ui, |ui| {
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ui.label("");
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for col in &cols {
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ui.label(format!(
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"cross_align: {:?}\ncross_justify:{:?}",
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||||
col.cross_align, col.cross_justify
|
||||
));
|
||||
}
|
||||
ui.end_row();
|
||||
|
||||
for row in &rows {
|
||||
ui.label(format!(
|
||||
"main_dir: {:?}\nmain_align: {:?}\nmain_justify: {:?}",
|
||||
row.main_dir, row.main_align, row.main_justify
|
||||
));
|
||||
for col in &cols {
|
||||
let layout = Layout {
|
||||
main_dir: row.main_dir,
|
||||
main_align: row.main_align,
|
||||
main_justify: row.main_justify,
|
||||
cross_align: col.cross_align,
|
||||
cross_justify: col.cross_justify,
|
||||
main_wrap: false,
|
||||
};
|
||||
|
||||
let (_, rect) = ui.allocate_space(test_size);
|
||||
|
||||
let mut child_ui = ui.new_child(UiBuilder::new().layout(layout).max_rect(rect));
|
||||
w(&mut child_ui);
|
||||
|
||||
ui.painter().rect_stroke(
|
||||
rect,
|
||||
0.0,
|
||||
Stroke::new(1.0, Color32::WHITE),
|
||||
StrokeKind::Outside,
|
||||
);
|
||||
}
|
||||
|
||||
ui.end_row();
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
harness.fit_contents();
|
||||
harness.try_snapshot(&format!("layout/{name}"))
|
||||
}
|
||||
|
||||
/// Utility to create a snapshot test of the different states of a egui widget.
|
||||
/// This renders each state to a texture to work around the fact only a single widget can be
|
||||
/// hovered / pressed / focused at a time.
|
||||
struct VisualTests<'a> {
|
||||
name: String,
|
||||
w: &'a mut dyn FnMut(&mut Ui) -> Response,
|
||||
results: Vec<(String, ColorImage)>,
|
||||
}
|
||||
|
||||
impl<'a> VisualTests<'a> {
|
||||
pub fn test(name: &str, mut w: impl FnMut(&mut Ui) -> Response) -> SnapshotResult {
|
||||
let mut vis = VisualTests::new(name, &mut w);
|
||||
vis.add_default_states();
|
||||
vis.render()
|
||||
}
|
||||
|
||||
pub fn new(name: &str, w: &'a mut dyn FnMut(&mut Ui) -> Response) -> Self {
|
||||
Self {
|
||||
name: name.to_owned(),
|
||||
w,
|
||||
results: Vec::new(),
|
||||
}
|
||||
}
|
||||
|
||||
fn add_default_states(&mut self) {
|
||||
self.add("idle", |_| {});
|
||||
self.add_node("hover", |node| {
|
||||
node.hover();
|
||||
});
|
||||
self.add("pressed", |harness| {
|
||||
harness.get_next().hover();
|
||||
let rect = harness.get_next().bounding_box().unwrap();
|
||||
let pos = Pos2::new(
|
||||
((rect.x0 + rect.x1) / 2.0) as f32,
|
||||
((rect.y0 + rect.y1) / 2.0) as f32,
|
||||
);
|
||||
harness.input_mut().events.push(Event::PointerButton {
|
||||
button: PointerButton::Primary,
|
||||
pos,
|
||||
pressed: true,
|
||||
modifiers: Default::default(),
|
||||
});
|
||||
});
|
||||
self.add_node("focussed", |node| {
|
||||
node.focus();
|
||||
});
|
||||
self.add_disabled();
|
||||
}
|
||||
|
||||
fn single_test(&mut self, f: impl FnOnce(&mut Harness<'_>), enabled: bool) -> ColorImage {
|
||||
let mut harness = Harness::builder().with_step_dt(0.05).build_ui(|ui| {
|
||||
egui_extras::install_image_loaders(ui.ctx());
|
||||
ui.add_enabled_ui(enabled, |ui| {
|
||||
(self.w)(ui);
|
||||
});
|
||||
});
|
||||
|
||||
harness.fit_contents();
|
||||
|
||||
// Wait for images to load
|
||||
harness.try_run_realtime().ok();
|
||||
|
||||
f(&mut harness);
|
||||
|
||||
harness.step();
|
||||
|
||||
let image = harness.render().expect("Failed to render harness");
|
||||
|
||||
ColorImage::from_rgba_unmultiplied(
|
||||
[image.width() as usize, image.height() as usize],
|
||||
image.as_ref(),
|
||||
)
|
||||
}
|
||||
|
||||
pub fn add(&mut self, name: &str, test: impl FnOnce(&mut Harness<'_>)) {
|
||||
let image = self.single_test(test, true);
|
||||
self.results.push((name.to_owned(), image));
|
||||
}
|
||||
|
||||
pub fn add_disabled(&mut self) {
|
||||
let image = self.single_test(|_| {}, false);
|
||||
self.results.push(("disabled".to_owned(), image));
|
||||
}
|
||||
|
||||
pub fn add_node(&mut self, name: &str, test: impl FnOnce(&Node<'_>)) {
|
||||
self.add(name, |harness| {
|
||||
let node = harness.get_next();
|
||||
test(&node);
|
||||
});
|
||||
}
|
||||
|
||||
pub fn render(self) -> SnapshotResult {
|
||||
let mut results = Some(self.results);
|
||||
let mut images: Option<Vec<(String, TextureHandle, SizedTexture)>> = None;
|
||||
|
||||
let mut harness = Harness::new_ui(|ui| {
|
||||
let results = images.get_or_insert_with(|| {
|
||||
results
|
||||
.take()
|
||||
.unwrap()
|
||||
.into_iter()
|
||||
.map(|(name, image)| {
|
||||
let size = Vec2::new(image.width() as f32, image.height() as f32);
|
||||
let texture_handle =
|
||||
ui.ctx()
|
||||
.load_texture(name.clone(), image, TextureOptions::default());
|
||||
let texture = SizedTexture::new(texture_handle.id(), size);
|
||||
(name.clone(), texture_handle, texture)
|
||||
})
|
||||
.collect()
|
||||
});
|
||||
|
||||
Grid::new("results").show(ui, |ui| {
|
||||
for (name, _, image) in results {
|
||||
ui.label(&*name);
|
||||
|
||||
ui.scope(|ui| {
|
||||
ui.image(*image);
|
||||
});
|
||||
|
||||
ui.end_row();
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
harness.fit_contents();
|
||||
|
||||
harness.try_snapshot(&format!("visuals/{}", self.name))
|
||||
}
|
||||
}
|
||||
|
||||
trait HarnessExt {
|
||||
fn get_next(&self) -> Node<'_>;
|
||||
}
|
||||
|
||||
impl HarnessExt for Harness<'_> {
|
||||
fn get_next(&self) -> Node<'_> {
|
||||
self.get_all(by()).next().unwrap()
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue