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fix(examples): taskmanager reactive headers with signals #84

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Merged
kolkov merged 1 commit into from
Apr 29, 2026
+18 −4
Merged

fix(examples): taskmanager reactive headers with signals #84

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22 changes: 18 additions & 4 deletions examples/taskmanager/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ import (
"github.com/gogpu/ui/core/progressbar"
"github.com/gogpu/ui/desktop"
"github.com/gogpu/ui/primitives"
"github.com/gogpu/ui/state"
"github.com/gogpu/ui/theme"
"github.com/gogpu/ui/widget"
)
Expand Down Expand Up @@ -60,7 +61,12 @@ type simState struct {
diskChart *linechart.Widget
memBar *progressbar.Widget

// Current values for reactive text labels.
// Reactive signals for collapsible headers.
cpuTitle state.Signal[string]
memTitle state.Signal[string]
diskTitle state.Signal[string]

// Current values for data simulation.
cpuPercent float64
memUsedGB float64
memTotalGB float64
Expand Down Expand Up @@ -94,6 +100,9 @@ func main() {
)

sim := &simState{
cpuTitle: state.NewSignal("CPU 0%"),
memTitle: state.NewSignal(fmt.Sprintf("Memory %.1f/%.0f GB", 0.51*16.0, 16.0)),
diskTitle: state.NewSignal("Disk 0 (C:) 0%"),
memTotalGB: 16.0,
memSmooth: 0.51,
cpuSmooth: 35.0,
Expand Down Expand Up @@ -165,7 +174,7 @@ func buildCPUSection(sim *simState) *collapsible.Widget {
).Gap(8).Padding(12).Background(colorSurface).Rounded(6)

return collapsible.New(
collapsible.Title("CPU 0%"),
collapsible.TitleFn(func() string { return sim.cpuTitle.Get() }),
collapsible.Content(content),
collapsible.Expanded(true),
collapsible.Animated(true),
Expand Down Expand Up @@ -207,7 +216,7 @@ func buildMemorySection(sim *simState) *collapsible.Widget {
).Gap(8).Padding(12).Background(colorSurface).Rounded(6)

return collapsible.New(
collapsible.Title(fmt.Sprintf("Memory %.1f/%.0f GB", sim.memSmooth*sim.memTotalGB, sim.memTotalGB)),
collapsible.TitleFn(func() string { return sim.memTitle.Get() }),
collapsible.Content(content),
collapsible.Expanded(true),
collapsible.Animated(true),
Expand Down Expand Up @@ -243,7 +252,7 @@ func buildDiskSection(sim *simState) *collapsible.Widget {
).Gap(8).Padding(12).Background(colorSurface).Rounded(6)

return collapsible.New(
collapsible.Title("Disk 0 (C:) 0%"),
collapsible.TitleFn(func() string { return sim.diskTitle.Get() }),
collapsible.Content(content),
collapsible.Expanded(true),
collapsible.Animated(true),
Expand Down Expand Up @@ -288,6 +297,11 @@ func runSimulation(sim *simState, gogpuApp *gogpu.App) {
sim.diskChart.PushValue("Read", sim.diskSmooth)
sim.diskChart.PushValue("Write", diskWrite)

// Update reactive headers.
sim.cpuTitle.Set(fmt.Sprintf("CPU %.0f%%", sim.cpuPercent))
sim.memTitle.Set(fmt.Sprintf("Memory %.1f/%.0f GB", sim.memUsedGB, sim.memTotalGB))
sim.diskTitle.Set(fmt.Sprintf("Disk 0 (C:) %.0f%%", sim.diskSmooth))

// Jitter process/thread counts slightly.
sim.processes += rand.IntN(5) - 2
if sim.processes < 200 {
Expand Down
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