Merge pull request #340 from gucio321/fix-our-examples

examples: major refactor
AllenDang · Sep 25, 2024 · 58292ac · 58292ac
2 parents 9ef4d5b + 24f9717
commit 58292ac
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diff --git a/examples/common/common.go b/examples/common/common.go
@@ -0,0 +1,131 @@
+// Package common contains code commonly used in the examples section of cimgui-go.
+package common
+
+import (
+	"bytes"
+	_ "embed"
+	"fmt"
+	"image"
+
+	"github.com/AllenDang/cimgui-go/backend"
+	"github.com/AllenDang/cimgui-go/imgui"
+	_ "github.com/AllenDang/cimgui-go/immarkdown"
+	_ "github.com/AllenDang/cimgui-go/imnodes"
+	"github.com/AllenDang/cimgui-go/implot"
+)
+
+var (
+	showDemoWindow bool
+	value1         int32
+	value2         int32
+	value3         int32
+	values         [2]int32 = [2]int32{value1, value2}
+	content        string   = "Let me try"
+	r              float32
+	g              float32
+	b              float32
+	a              float32
+	color4         [4]float32 = [4]float32{r, g, b, a}
+	selected       bool
+	//go:embed test.jpeg
+	imgData   []byte
+	img       *image.RGBA
+	texture   *backend.Texture
+	barValues []int64
+)
+
+// Initialize prepares global variables. Call before anything related to backend.
+func Initialize() {
+	imgImage, _, _ := image.Decode(bytes.NewReader(imgData))
+	img = backend.ImageToRgba(imgImage)
+
+	for i := 0; i < 10; i++ {
+		barValues = append(barValues, int64(i+1))
+	}
+}
+
+func InputTextCallback(data imgui.InputTextCallbackData) int {
+	fmt.Println("got call back")
+	return 0
+}
+
+func AfterCreateContext() {
+	texture = backend.NewTextureFromRgba(img)
+	implot.PlotCreateContext()
+}
+
+func BeforeDestroyContext() {
+	implot.PlotDestroyContext()
+}
+
+func Loop() {
+	ShowWidgetsDemo()
+	ShowPictureLoadingDemo()
+	ShowImPlotDemo()
+}
+
+func ShowWidgetsDemo() {
+	if showDemoWindow {
+		imgui.ShowDemoWindowV(&showDemoWindow)
+	}
+
+	imgui.SetNextWindowSizeV(imgui.NewVec2(300, 300), imgui.CondOnce)
+	imgui.Begin("Window 1")
+	if imgui.ButtonV("Click Me", imgui.NewVec2(80, 20)) {
+		fmt.Println("Button clicked")
+	}
+	imgui.TextUnformatted("Unformatted text")
+	imgui.Checkbox("Show demo window", &showDemoWindow)
+	if imgui.BeginCombo("Combo", "Combo preview") {
+		imgui.SelectableBoolPtr("Item 1", &selected)
+		imgui.SelectableBool("Item 2")
+		imgui.SelectableBool("Item 3")
+		imgui.EndCombo()
+	}
+
+	if imgui.RadioButtonBool("Radio button1", selected) {
+		selected = true
+	}
+
+	imgui.SameLine()
+
+	if imgui.RadioButtonBool("Radio button2", !selected) {
+		selected = false
+	}
+
+	imgui.InputTextWithHint("Name", "write your name here", &content, 0, InputTextCallback)
+	imgui.Text(content)
+	imgui.SliderInt("Slider int", &value3, 0, 100)
+	imgui.DragInt("Drag int", &value1)
+	imgui.DragInt2("Drag int2", &values)
+	value1 = values[0]
+	imgui.ColorEdit4("Color Edit3", &color4)
+	imgui.End()
+}
+
+func ShowPictureLoadingDemo() {
+	// demo of showing a picture
+	basePos := imgui.MainViewport().Pos()
+	imgui.SetNextWindowPosV(imgui.NewVec2(basePos.X+60, 600), imgui.CondOnce, imgui.NewVec2(0, 0))
+	imgui.Begin("Image")
+	imgui.Text(fmt.Sprintf("pointer = %v", texture.ID))
+	imgui.ImageV(texture.ID, imgui.NewVec2(float32(texture.Width), float32(texture.Height)), imgui.NewVec2(0, 0), imgui.NewVec2(1, 1), imgui.NewVec4(1, 1, 1, 1), imgui.NewVec4(0, 0, 0, 0))
+	imgui.End()
+}
+
+func ShowImPlotDemo() {
+	basePos := imgui.MainViewport().Pos()
+	imgui.SetNextWindowPosV(imgui.NewVec2(basePos.X+400, basePos.Y+60), imgui.CondOnce, imgui.NewVec2(0, 0))
+	imgui.SetNextWindowSizeV(imgui.NewVec2(500, 300), imgui.CondOnce)
+	imgui.Begin("Plot window")
+	if implot.PlotBeginPlotV("Plot", imgui.NewVec2(-1, -1), 0) {
+		implot.PlotPlotBarsS64PtrInt("Bar", barValues, int32(len(barValues)))
+		implot.PlotPlotLineS64PtrInt("Line", barValues, int32(len(barValues)))
+		implot.PlotEndPlot()
+	}
+	imgui.End()
+}
+
+func Image() *image.RGBA {
+	return img
+}
diff --git a/examples/assets/test.jpeg → examples/common/test.jpeg b/examples/assets/test.jpeg → examples/common/test.jpeg
diff --git a/examples/ebiten-game-in-texture/.gitignore b/examples/ebiten-game-in-texture/.gitignore
@@ -0,0 +1,2 @@
+example-ebiten
+imgui.ini
diff --git a/examples/ebiten-game-in-texture/main.go b/examples/ebiten-game-in-texture/main.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/AllenDang/cimgui-go/backend"
 	ebitenbackend "github.com/AllenDang/cimgui-go/backend/ebiten-backend"
+	"github.com/AllenDang/cimgui-go/examples/common"
 	"github.com/AllenDang/cimgui-go/imgui"
 	"github.com/AllenDang/cimgui-go/implot"
 	"github.com/hajimehoshi/ebiten/v2"
@@ -14,68 +15,10 @@ import (
 )
 
 var (
-	showDemoWindow bool
-	value1         int32
-	value2         int32
-	value3         int32
-	values         [2]int32 = [2]int32{value1, value2}
-	content        string   = "Let me try"
-	r              float32
-	g              float32
-	b              float32
-	a              float32
-	color4         [4]float32 = [4]float32{r, g, b, a}
-	selected       bool
 	currentBackend *ebitenbackend.EbitenBackend
 	texture        *backend.Texture
-	barValues      []int64
 )
 
-func callback(data imgui.InputTextCallbackData) int {
-	fmt.Println("got call back")
-	return 0
-}
-
-func showWidgetsDemo() {
-	if showDemoWindow {
-		imgui.ShowDemoWindowV(&showDemoWindow)
-	}
-
-	imgui.SetNextWindowSizeV(imgui.NewVec2(300, 300), imgui.CondOnce)
-	imgui.Begin("Window 1")
-	if imgui.ButtonV("Click Me", imgui.NewVec2(80, 20)) {
-		w, h := currentBackend.DisplaySize()
-		fmt.Println(w, h)
-	}
-	imgui.TextUnformatted("Unformatted text")
-	imgui.Checkbox("Show demo window", &showDemoWindow)
-	if imgui.BeginCombo("Combo", "Combo preview") {
-		imgui.SelectableBoolPtr("Item 1", &selected)
-		imgui.SelectableBool("Item 2")
-		imgui.SelectableBool("Item 3")
-		imgui.EndCombo()
-	}
-
-	if imgui.RadioButtonBool("Radio button1", selected) {
-		selected = true
-	}
-
-	imgui.SameLine()
-
-	if imgui.RadioButtonBool("Radio button2", !selected) {
-		selected = false
-	}
-
-	imgui.InputTextWithHint("Name", "write your name here", &content, 0, callback)
-	imgui.Text(content)
-	imgui.SliderInt("Slider int", &value3, 0, 100)
-	imgui.DragInt("Drag int", &value1)
-	imgui.DragInt2("Drag int2", &values)
-	value1 = values[0]
-	imgui.ColorEdit4("Color Edit3", &color4)
-	imgui.End()
-}
-
 func showPictureLoadingDemo() {
 	// demo of showing a picture
 	basePos := imgui.MainViewport().Pos()
@@ -86,19 +29,6 @@ func showPictureLoadingDemo() {
 	imgui.End()
 }
 
-func showImPlotDemo() {
-	basePos := imgui.MainViewport().Pos()
-	imgui.SetNextWindowPosV(imgui.NewVec2(basePos.X+400, basePos.Y+60), imgui.CondOnce, imgui.NewVec2(0, 0))
-	imgui.SetNextWindowSizeV(imgui.NewVec2(500, 300), imgui.CondOnce)
-	imgui.Begin("Plot window")
-	if implot.PlotBeginPlotV("Plot", imgui.NewVec2(-1, -1), 0) {
-		implot.PlotPlotBarsS64PtrInt("Bar", barValues, int32(len(barValues)))
-		implot.PlotPlotLineS64PtrInt("Line", barValues, int32(len(barValues)))
-		implot.PlotEndPlot()
-	}
-	imgui.End()
-}
-
 func afterCreateContext() {
 	texture = &backend.Texture{
 		ID:     currentBackend.CreateTextureFromGame(&Game{}, screenWidth, screenHeight),
@@ -110,19 +40,17 @@ func afterCreateContext() {
 }
 
 func loop() {
-	showWidgetsDemo()
+	common.ShowWidgetsDemo()
 	showPictureLoadingDemo()
-	showImPlotDemo()
+	common.ShowImPlotDemo()
 }
 
 func beforeDestroyContext() {
 	implot.PlotDestroyContext()
 }
 
 func main() {
-	for i := 0; i < 10; i++ {
-		barValues = append(barValues, int64(i+1))
-	}
+	common.Initialize()
 
 	currentBackend = ebitenbackend.NewEbitenBackend()
 	_, _ = backend.CreateBackend(currentBackend)
@@ -147,6 +75,9 @@ func main() {
 	currentBackend.Run(loop)
 }
 
+// code from ebiten/examples/shape (https://github.com/hajimehoshi/ebiten
+// for details see LICENSE of ebiten
+
 const (
 	screenWidth, screenHeight = 800, 600
 )

diff --git a/examples/ebiten-game/Makefile b/examples/ebiten-game/Makefile
@@ -0,0 +1,7 @@
+all: run
+
+build:
+	go build -v -o example-ebiten .
+
+run: build
+	./example-ebiten
diff --git a/examples/ebiten-game/imgui.ini b/examples/ebiten-game/imgui.ini
@@ -0,0 +1,20 @@
+[Window][Debug##Default]
+Pos=60,60
+Size=400,400
+Collapsed=0
+
+[Window][Window 1]
+Pos=-4,11
+Size=300,300
+Collapsed=0
+
+[Window][Image]
+Pos=105,492
+Size=272,479
+Collapsed=0
+
+[Window][Plot window]
+Pos=400,60
+Size=500,300
+Collapsed=0
+