add an about activity

1 files changed, 60 insertions, 0 deletions

diff --git a/go/activities/about.go b/go/activities/about.go
new file mode 100644
index 00000000..8669f5bb
--- /dev/null
+++ b/go/activities/about.go
@@ -0,0 +1,60 @@
+package activities
+
+import (
+	"image/color"
+
+	"muhq.space/muhqs-game/go/ui"
+)
+
+// About is an Activity that presents the about information in a scrollable buffer.
+// It features an arrow back button calling activities.PopActivity().
+type About struct {
+	ui.Collection
+}
+
+var about = [...]string{
+	" ",
+	"Muhq's Game",
+	"Copyright Florian Fischer",
+	"Game material GNU Free Documentation License",
+	"Implementation GNU GPL 3+",
+	" ",
+	"Font: Antykwa Torunska",
+	"Designer: Zygfryd Gardzielewski",
+	"Author: Janusz Marian Nowacki",
+	"This work is released under the GUST Font Nosource License",
+	" ",
+	"Used go packages",
+	"github.com/RyanCarrier/dijkstra -  MIT License",
+	"github.com/hajimehoshi/ebiten - Apache 2.0 license",
+	"golang.org/x/image - BSD-3-Clause",
+	"golang.org/x/net - BSD-3-Clause",
+	"gopkg.in/yaml.v3",
+}
+
+const ABOUT_MARGIN = 25
+
+func NewAbout(width, height int) *About {
+	a := &About{ui.Collection{Width: width, Height: height}}
+
+	buffer := ui.NewBuffer(ABOUT_MARGIN, ABOUT_MARGIN, width-2*ABOUT_MARGIN, height-2*ABOUT_MARGIN)
+	a.AddWidget(buffer)
+	buffer.Bg(color.Black)
+	buffer.AddLines(about[:])
+
+	back := ui.NewRoundSimpleButton(5, 5, 40, "←", func(*ui.SimpleButton) { PopActivity() })
+	a.AddWidget(back)
+
+	return a
+}
+
+func (a *About) Layout(int, int) (int, int) {
+	return a.Width, a.Height
+}
+
+func (a *About) Update() error {
+	if err := ui.Update(); err != nil {
+		return err
+	}
+	return a.Collection.Update()
+}