resstructure

glfw.go

@@ -0,0 +1,163 @@
+// PresentationApp project glfw.go
+package main
+
+import (
+	"fmt"
+	"image"
+	"log"
+
+	"github.com/go-gl/gl/v2.1/gl"
+	"github.com/go-gl/glfw/v3.1/glfw"
+	"github.com/lordwelch/qml"
+)
+
+var (
+	win         *glfw.Window
+	monWidth    int //displayed height
+	monHeight   int //displayed width
+	monitors    []*glfw.Monitor
+	projMonitor *glfw.Monitor
+	tex1        *uint32 //identifier for opengl texture
+	texDel      Bool    //if texture should be deleted
+)
+
+func setupScene() {
+
+	gl.ClearColor(0, 0, 0, 0)
+	if texDel {
+		gl.DeleteTextures(1, tex1)
+	}
+	tex1 = newTexture(*slides[selCell].getImage(monWidth, monHeight))
+
+	gl.MatrixMode(gl.PROJECTION)
+	gl.LoadIdentity()
+	gl.Ortho(-1, 1, -1, 1, 1.0, 10.0)
+	gl.MatrixMode(gl.MODELVIEW)
+	gl.LoadIdentity()
+	texDel = true
+
+}
+
+func drawSlide() {
+	gl.Clear(gl.COLOR_BUFFER_BIT)
+
+	gl.MatrixMode(gl.MODELVIEW)
+	gl.LoadIdentity()
+	gl.Translatef(0, 0, -3.0)
+
+	gl.Begin(gl.QUADS)
+
+	//top left
+	gl.TexCoord2f(0, 0)
+	gl.Vertex3f(-1, 1, 0)
+	//top right
+	gl.TexCoord2f(1, 0)
+	gl.Vertex3f(1, 1, 0)
+
+	//bottom right
+	gl.TexCoord2f(1, 1)
+	gl.Vertex3f(1, -1, 0)
+
+	//bottom left
+	gl.TexCoord2f(0, 1)
+	gl.Vertex3f(-1, -1, 0)
+
+	gl.End()
+
+}
+
+func newTexture(rgba image.RGBA) *uint32 {
+	var texture1 uint32
+	gl.Enable(gl.TEXTURE_2D)
+	gl.GenTextures(1, &texture1)
+	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
+	gl.TexImage2D(
+		gl.TEXTURE_2D,
+		0,
+		gl.RGBA,
+		int32(rgba.Rect.Size().X),
+		int32(rgba.Rect.Size().Y),
+		0,
+		gl.RGBA,
+		gl.UNSIGNED_BYTE,
+		gl.Ptr(rgba.Pix))
+
+	return &texture1
+
+}
+
+func checkMon() {
+	monitors = glfw.GetMonitors()
+	glfw.WindowHint(glfw.ContextVersionMajor, 2)
+	glfw.WindowHint(glfw.ContextVersionMinor, 1)
+	glfw.WindowHint(glfw.AutoIconify, glfw.False)
+	glfw.WindowHint(glfw.Decorated, glfw.False)
+
+	if i := len(monitors); i < 2 {
+		fmt.Println("You only have 1 monitor!!!!!!!!!!! :-P")
+		monWidth = 800
+		monHeight = 600
+
+		win, err = glfw.CreateWindow(monWidth, monHeight, "Cube", nil, nil)
+		if err != nil {
+			panic(err)
+		}
+		projMonitor = monitors[0]
+	} else {
+		fmt.Printf("You have %d monitors\n", i)
+		monWidth = monitors[1].GetVideoMode().Width
+		monHeight = monitors[1].GetVideoMode().Height
+		win, err = glfw.CreateWindow(monWidth, monHeight, "Cube", nil, nil)
+		win.SetPos(monitors[1].GetPos())
+		fmt.Printf("Width: %d  Height: %d \n",monWidth, monHeight)
+		if err != nil {
+			panic(err)
+		}
+		projMonitor = monitors[1]
+
+	}
+	monitorInfo()
+
+}
+
+func monitorInfo() {
+	for _, mon := range monitors {
+		fmt.Printf("monitor name: %s\n", mon.GetName())
+		i, t := mon.GetPos()
+		fmt.Printf("position X: %d  Y: %d\n", i, t)
+
+	}
+
+}
+
+func glInit() {
+	window.Set("cls", false)
+	if err = glfw.Init(); err != nil {
+		log.Fatalln("failed to initialize glfw:", err)
+	}
+	checkMon()
+
+	win.MakeContextCurrent()
+
+	if err := gl.Init(); err != nil {
+		panic(err)
+	}
+
+	win.SetPos(projMonitor.GetPos())
+	setupScene()
+
+	qml.Func1 = func() int {
+		if !win.ShouldClose() {
+			glfw.PollEvents()
+			drawSlide()
+			win.SwapBuffers()
+			return 0
+
+		}
+		win.Hide()
+		win.Destroy()
+		glfw.Terminate()
+		return 1
+
+	}
+}

imagick.go

@@ -1,8 +1,9 @@
-// magickwand.go
+// PresentationApp project imagick.go
 package main
 
 import (
-	"math"
+	"image"
+	. "math"
 
 	"gopkg.in/gographics/imagick.v2/imagick"
 )
@@ -60,9 +61,29 @@ func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize,
 
 }
 
+//getImage() from imagick to image.RGBA
+func (cl cell) getImage(width, height int) (img *image.RGBA) {
+	mw := cl.img.GetImage()
+	if (width == 0) || (height == 0) {
+		width = int(mw.GetImageWidth())
+		height = int(mw.GetImageHeight())
+	}
+
+	mw = resizeImage(mw, width, height, true, true)
+	img = image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
+	if img.Stride != img.Rect.Size().X*4 {
+		panic("unsupported stride")
+	}
+
+	Tpix, _ := mw.ExportImagePixels(0, 0, uint(width), uint(height), "RGBA", imagick.PIXEL_CHAR)
+	img.Pix = Tpix.([]uint8)
+	mw.Destroy()
+	return
+}
+
 func round(a float64) int {
 	if a < 0 {
-		return int(math.Ceil(a - 0.5))
+		return int(Ceil(a - 0.5))
 	}
-	return int(math.Floor(a + 0.5))
+	return int(Floor(a + 0.5))
 }

imgprovider.go

@@ -1,23 +0,0 @@
-// imgprovider.go
-package main
-
-import (
-	"image"
-	"strconv"
-	"strings"
-)
-
-var imgready = false
-
-func imgProvider(id string, width, height int) image.Image {
-	if imgready && (len(id) > 0) {
-		//fmt.Println("source (provider): ", id)
-		i1 := strings.Index(id, `;`)
-		i, _ := strconv.Atoi(id[:i1])
-		return slides[i].getImage(width, height)
-
-	} else {
-		var img1 image.Image = image.NewRGBA(image.Rect(0, 0, 340, 480))
-		return img1
-	}
-}

main.go

@@ -3,22 +3,15 @@ package main
 
 import (
 	"fmt"
-	"image"
-	"log"
 	"os"
 	"path/filepath"
-	"runtime/debug"
-	"strconv"
-	"strings"
 
-	"github.com/go-gl/gl/v2.1/gl"
-	"github.com/go-gl/glfw/v3.1/glfw"
 	"github.com/kardianos/osext"
 	"github.com/lordwelch/qml"
 	"gopkg.in/gographics/imagick.v2/imagick"
 )
 
-//lazy wanted a toggle function
+//Bool type i'm lazy wanted a toggle function
 type Bool bool
 
 type cell struct {
@@ -31,24 +24,12 @@ type cell struct {
 type slide []*cell
 
 var (
-	//displayed width/height the focused and the cell that was last right clicked
-	monWidth, monHeight, selCell, rhtClkCell int
 	path   string
-	qimg                                     qml.Object //file for the image object
-	textEdit                                 qml.Object
-	cellQml                                  qml.Object   //file for the cell object
-	window                                   *qml.Window  //QML
-	win                                      *glfw.Window //GLFW
 	slides slide
 	err    error
-	monitors                                 []*glfw.Monitor
-	projMonitor                              *glfw.Monitor
-	tex1                                     *uint32                //identifier for opengl texture
-	texDel, quickEdit                        Bool    = false, false //if texture should be deleted
 )
 
 func main() {
-	selCell = 0
 
 	if err = qml.Run(run); err != nil {
 		fmt.Fprintf(os.Stderr, "error: %v\n", err)
@@ -58,7 +39,6 @@ func main() {
 }
 
 func run() error {
-	var mainQml qml.Object
 	imagick.Initialize()
 
 	engine := qml.NewEngine()
@@ -85,15 +65,15 @@ func run() error {
 	window = mainQml.CreateWindow(nil)
 
 	textEdit = window.ObjectByName("textEdit")
-	slides.addCell()
-
 	//signals for whole qml
 	setSignals()
+	slides.add()
 
 	//image is ready for imageprovider
 	imgready = true
 
 	window.Show()
+	slides[0].clearcache()
 	qml.RunMain(glInit)
 
 	window.Wait()
@@ -102,290 +82,8 @@ func run() error {
 	return nil
 }
 
-func setupScene() {
-
-	gl.ClearColor(0, 0, 0, 0)
-	if texDel {
-		gl.DeleteTextures(1, tex1)
-	}
-	tex1 = newTexture(*slides[selCell].getImage(monWidth, monHeight))
-
-	gl.MatrixMode(gl.PROJECTION)
-	gl.LoadIdentity()
-	gl.Ortho(-1, 1, -1, 1, 1.0, 10.0)
-	gl.MatrixMode(gl.MODELVIEW)
-	gl.LoadIdentity()
-	texDel = true
-
-}
-
-func drawSlide() {
-	gl.Clear(gl.COLOR_BUFFER_BIT)
-
-	gl.MatrixMode(gl.MODELVIEW)
-	gl.LoadIdentity()
-	gl.Translatef(0, 0, -3.0)
-
-	gl.Begin(gl.QUADS)
-
-	//top left
-	gl.TexCoord2f(0, 0)
-	gl.Vertex3f(-1, 1, 0)
-	//top right
-	gl.TexCoord2f(1, 0)
-	gl.Vertex3f(1, 1, 0)
-
-	//bottom right
-	gl.TexCoord2f(1, 1)
-	gl.Vertex3f(1, -1, 0)
-
-	//bottom left
-	gl.TexCoord2f(0, 1)
-	gl.Vertex3f(-1, -1, 0)
-
-	gl.End()
-
-}
-
-func newTexture(rgba image.RGBA) *uint32 {
-	var texture1 uint32
-	gl.Enable(gl.TEXTURE_2D)
-	gl.GenTextures(1, &texture1)
-	gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
-	gl.TexImage2D(
-		gl.TEXTURE_2D,
-		0,
-		gl.RGBA,
-		int32(rgba.Rect.Size().X),
-		int32(rgba.Rect.Size().Y),
-		0,
-		gl.RGBA,
-		gl.UNSIGNED_BYTE,
-		gl.Ptr(rgba.Pix))
-
-	return &texture1
-
-}
-
-func checkMon() {
-	monitors = glfw.GetMonitors()
-	glfw.WindowHint(glfw.ContextVersionMajor, 2)
-	glfw.WindowHint(glfw.ContextVersionMinor, 1)
-	glfw.WindowHint(glfw.AutoIconify, glfw.False)
-	glfw.WindowHint(glfw.Decorated, glfw.False)
-
-	if i := len(monitors); i < 2 {
-		fmt.Println("You only have 1 monitor!!!!!!!!!!! :-P")
-		monWidth = 800
-		monHeight = 600
-
-		win, err = glfw.CreateWindow(monWidth, monHeight, "Cube", nil, nil)
-		if err != nil {
-			panic(err)
-		}
-		projMonitor = monitors[0]
-	} else {
-		fmt.Printf("You have %d monitors\n", i)
-		monWidth = monitors[1].GetVideoMode().Width
-		monHeight = monitors[1].GetVideoMode().Height
-		win, err = glfw.CreateWindow(monWidth, monHeight, "Cube", nil, nil)
-		fmt.Println(win.GetPos())
-		win.SetPos(monitors[1].GetPos())
-		fmt.Println(monWidth, monHeight)
-		if err != nil {
-			panic(err)
-		}
-		projMonitor = monitors[1]
-
-	}
-	monitorInfo()
-
-}
-
-func monitorInfo() {
-	for _, mon := range monitors {
-		fmt.Printf("monitor name: %s\n", mon.GetName())
-		i, t := mon.GetPos()
-		fmt.Printf("position X: %d  Y: %d\n", i, t)
-
-	}
-
-}
-
-func glInit() {
-	if err = glfw.Init(); err != nil {
-		log.Fatalln("failed to initialize glfw:", err)
-	}
-	checkMon()
-
-	win.MakeContextCurrent()
-
-	if err := gl.Init(); err != nil {
-		panic(err)
-	}
-
-	win.SetPos(projMonitor.GetPos())
-	setupScene()
-
-	qml.Func1 = func() int {
-		if !win.ShouldClose() {
-			glfw.PollEvents()
-			drawSlide()
-			win.SwapBuffers()
-			return 0
-
-		} else {
-			win.Hide()
-			//win.Destroy()
-			glfw.Terminate()
-			return 1
-
-		}
-	}
-}
-
-//setSignals() for non dynamic elements
-func setSignals() {
-	window.ObjectByName("imgpicker").On("accepted", func() {
-		//delete file://  from url
-		url := filepath.Clean(strings.Replace(window.ObjectByName("imgpicker").String("fileUrl"), "file:", "", 1))
-
-		//replace new image
-		slides[rhtClkCell].img.Clear()
-		slides[rhtClkCell].img.ReadImage(url)
-		setupScene()
-		//update image preview
-		slides[rhtClkCell].clearcache()
-	})
-
-	window.ObjectByName("btnAdd").On("clicked", func() {
-		slides.addCell()
-	})
-
-	window.ObjectByName("btnRem").On("clicked", func() {
-		slides[len(slides)-1].remove()
-	})
-
-	window.ObjectByName("btnMem").On("clicked", func() {
-		//run GC
-		debug.FreeOSMemory()
-	})
-
-	window.On("closing", func() {
-		//close glfw first
-		if false == window.Property("cls") {
-			win.SetShouldClose(true)
-			window.Set("cls", true)
-		}
-
-	})
-
-	window.ObjectByName("mnuEdit").On("triggered", func() {
-		(&quickEdit).Toggle()
-	})
-
-	textEdit.ObjectByName("textEdit1").On("focusChanged", func(focus bool) {
-		var (
-			str string
-			cel *cell
-		)
-
-		if !focus {
-			//set text back to the cell
-			str = textEdit.ObjectByName("textEdit1").String("text")
-			cel = slides[textEdit.Int("cell")]
-			if textEdit.Bool("txt") {
-				cel.qmlcell.ObjectByName("cellText").Set("text", str)
-				cel.text = str
-			}
-		}
-	})
-
-}
-
-//getImage() from imagick to image.RGBA
-func (cl cell) getImage(width, height int) (img *image.RGBA) {
-	mw := cl.img.GetImage()
-	if (width == 0) || (height == 0) {
-		width = int(mw.GetImageWidth())
-		height = int(mw.GetImageHeight())
-	}
-
-	mw = resizeImage(mw, width, height, true, true)
-	img = image.NewRGBA(image.Rect(0, 0, int(width), int(height)))
-	if img.Stride != img.Rect.Size().X*4 {
-		panic("unsupported stride")
-	}
-
-	Tpix, _ := mw.ExportImagePixels(0, 0, uint(width), uint(height), "RGBA", imagick.PIXEL_CHAR)
-	img.Pix = Tpix.([]uint8)
-	mw.Destroy()
-	return
-}
-
-//signals for the cell and image in qml
-func (cl *cell) setSignal() {
-	cl.qmlcell.ObjectByName("cellMouse").On("clicked", func(musEvent qml.Object) {
-		btn := musEvent.Property("button")
-		//right click
-		if btn == 2 {
-			//context menu
-			window.ObjectByName("mnuCtx").Call("popup")
-			rhtClkCell = cl.index
-		} else {
-			//left click
-			//select and update image preview for cell
-			selCell = cl.qmlcell.Int("index")
-			cl.qmlcell.ObjectByName("cellMouse").Set("focus", true)
-			setupScene()
-		}
-		//update image preview
-		cl.clearcache()
-	})
-
-	cl.qmlcell.ObjectByName("cellMouse").On("focusChanged", func(focus bool) {
-		if focus {
-			cl.qmlcell.ObjectByName("cellMouse").Call("selected")
-		} else {
-			cl.qmlcell.ObjectByName("cellMouse").Call("notSelected")
-		}
-	})
-
-	cl.qmlcell.ObjectByName("cellMouse").On("doubleClicked", func() {
-		if quickEdit {
-			//cover the cell with the text edit
-			textEdit.Set("cell", cl.index)
-			textEdit.Set("x", cl.qmlcell.Int("x"))
-			textEdit.Set("y", cl.qmlcell.Int("y"))
-			textEdit.Set("height", cl.qmlcell.Int("height"))
-			textEdit.Set("z", 100)
-			textEdit.Set("visible", true)
-			textEdit.ObjectByName("textEdit1").Set("focus", true)
-			textEdit.Set("enabled", true)
-
-			//set the text
-			textEdit.ObjectByName("textEdit1").Set("text", cl.text)
-		}
-	})
-
-}
-
-//clear cache dosen't actually clear the cache
-//just gives a new source so that the cache isn't used
-func (cl *cell) clearcache() {
-	str := cl.qmlimg.String("source")
-	//fmt.Println("source (click): ", str)
-	i := strings.Index(str, `;`)
-	str1 := str[:i]
-	//fmt.Println("ext (click): ", str1)
-	i1, _ := strconv.Atoi(str[i+1:])
-	str = str1 + `;` + strconv.Itoa(i1+1)
-	//fmt.Println("new source (click): ", str)
-	cl.qmlimg.Set("source", str)
-}
-
 //Adds a new cell
-func (sl *slide) addCell( /*cl *cell*/ ) {
+func (sl *slide) add( /*cl *cell*/ ) {
 	var cl cell
 	//gets the length so that the index is valid
 	cl.index = len(*sl)
@@ -411,17 +109,14 @@ func (sl *slide) addCell( /*cl *cell*/ ) {
 
 	//seperate image object in QML
 	cl.qmlimg = qimg.Create(nil)
-	fmt.Println("index", cl.index)
-	fmt.Printf("objectName: %s\n", fmt.Sprintf("cellImg%d", cl.index))
 	cl.qmlimg.Set("objectName", fmt.Sprintf("cellImg%d", cl.index))
 	cl.qmlimg.Set("source", fmt.Sprintf("image://images/%d"+`;`+"0", cl.index))
-	fmt.Println("source: ", cl.qmlimg.String("source"))
 	cl.qmlimg.Set("parent", window.ObjectByName("data2"))
 	cl.qmlimg.Set("index", cl.index)
 
 }
 
-//remove() should destroy everything
+//(cell) remove() should destroy everything
 func (cl *cell) remove() {
 	cl.text = ""
 	cl.qmlimg.Destroy()
@@ -433,12 +128,12 @@ func (cl *cell) remove() {
 
 }
 
-//(slide) remove copied from gist on github
+//(slide) remove copied from github.com/golang/go/wiki/SliceTricks
 func (sl *slide) remove(i int) {
 	*sl, (*sl)[len((*sl))-1] = append((*sl)[:i], (*sl)[i+1:]...), nil
 }
 
-//lazy wanted a toggle func
+//Toggle lazy wanted a func for it
 func (bl *Bool) Toggle() {
 	if *bl == false {
 		*bl = true

main.qml

@@ -56,6 +56,15 @@ ApplicationWindow {
             }
         }
 
+        Menu {
+            title: "Window"
+
+            MenuItem {
+                text: "Display"
+                objectName: "mnuDisplay"
+            }
+        }
+
         Menu {
             title: "&Help"
             MenuItem {

qml.go

@@ -0,0 +1,162 @@
+// PresentationApp project qml.go
+package main
+
+import (
+	"image"
+	"path/filepath"
+	"runtime/debug"
+	"strconv"
+	"strings"
+
+	"github.com/lordwelch/qml"
+)
+
+var (
+	selCell    int        //the focused and
+	rhtClkCell int        //the cell that was last right clicked
+	qimg       qml.Object //file for the image object
+	cellQml    qml.Object //file for the cell object
+	mainQml    qml.Object //main QML file
+	textEdit   qml.Object
+	window     *qml.Window
+	quickEdit  Bool = false
+	imgready   Bool = false
+)
+
+//signals for the cell and image in qml
+func (cl *cell) setSignal() {
+	cl.qmlcell.ObjectByName("cellMouse").On("clicked", func(musEvent qml.Object) {
+		btn := musEvent.Property("button")
+		//right click
+		if btn == 2 {
+			//context menu
+			window.ObjectByName("mnuCtx").Call("popup")
+			rhtClkCell = cl.index
+		} else {
+			//left click
+			//select and update image preview for cell
+			selCell = cl.qmlcell.Int("index")
+			cl.qmlcell.ObjectByName("cellMouse").Set("focus", true)
+			setupScene()
+		}
+		//update image preview
+		cl.clearcache()
+	})
+
+	cl.qmlcell.ObjectByName("cellMouse").On("focusChanged", func(focus bool) {
+		if focus {
+			cl.qmlcell.ObjectByName("cellMouse").Call("selected")
+		} else {
+			cl.qmlcell.ObjectByName("cellMouse").Call("notSelected")
+		}
+	})
+
+	cl.qmlcell.ObjectByName("cellMouse").On("doubleClicked", func() {
+		if quickEdit {
+			//cover the cell with the text edit
+			textEdit.Set("cell", cl.index)
+			textEdit.Set("x", cl.qmlcell.Int("x"))
+			textEdit.Set("y", cl.qmlcell.Int("y"))
+			textEdit.Set("height", cl.qmlcell.Int("height"))
+			textEdit.Set("z", 100)
+			textEdit.Set("visible", true)
+			textEdit.ObjectByName("textEdit1").Set("focus", true)
+			textEdit.Set("enabled", true)
+
+			//set the text
+			textEdit.ObjectByName("textEdit1").Set("text", cl.text)
+		}
+	})
+
+}
+
+//setSignals() for non dynamic elements
+func setSignals() {
+	window.ObjectByName("imgpicker").On("accepted", func() {
+		//delete file://  from url
+		url := filepath.Clean(strings.Replace(window.ObjectByName("imgpicker").String("fileUrl"), "file:", "", 1))
+
+		//replace new image
+		slides[rhtClkCell].img.Clear()
+		slides[rhtClkCell].img.ReadImage(url)
+		setupScene()
+		//update image preview
+		slides[rhtClkCell].clearcache()
+	})
+
+	window.ObjectByName("btnAdd").On("clicked", func() {
+		slides.add()
+	})
+
+	window.ObjectByName("btnRem").On("clicked", func() {
+		slides[len(slides)-1].remove()
+	})
+
+	window.ObjectByName("btnMem").On("clicked", func() {
+		//run GC
+		debug.FreeOSMemory()
+	})
+
+	window.On("closing", func() {
+		//close glfw first
+		if false == window.Property("cls") {
+			win.SetShouldClose(true)
+			window.Set("cls", true)
+		}
+
+	})
+
+	window.ObjectByName("mnuDisplay").On("triggered", func() {
+		qml.RunMain(glInit)
+	})
+
+	window.ObjectByName("mnuEdit").On("triggered", func() {
+		(&quickEdit).Toggle()
+	})
+
+	textEdit.ObjectByName("textEdit1").On("focusChanged", func(focus bool) {
+		var (
+			str string
+			cel *cell
+		)
+
+		if !focus {
+			//set text back to the cell
+			str = textEdit.ObjectByName("textEdit1").String("text")
+			cel = slides[textEdit.Int("cell")]
+			if textEdit.Bool("txt") {
+				cel.qmlcell.ObjectByName("cellText").Set("text", str)
+				cel.text = str
+			}
+		}
+	})
+
+}
+
+//imgProvider() for preview images in QML
+func imgProvider(id string, width, height int) image.Image {
+	if imgready && (len(id) > 0) {
+		//fmt.Println("source (provider): ", id)
+		i1 := strings.Index(id, `;`)
+		i, _ := strconv.Atoi(id[:i1])
+		return slides[i].getImage(width, height)
+
+	}
+	var img1 image.Image = image.NewRGBA(image.Rect(0, 0, 340, 480))
+	return img1
+
+}
+
+//clear cache dosen't actually clear the cache
+//just gives a new source so that the cache isn't used
+func (cl *cell) clearcache() {
+	str := cl.qmlimg.String("source")
+	//fmt.Println("source (click): ", str)
+	i := strings.Index(str, `;`)
+	str1 := str[:i]
+	//fmt.Println("ext (click): ", str1)
+	i1, _ := strconv.Atoi(str[i+1:])
+	str = str1 + `;` + strconv.Itoa(i1+1)
+	//fmt.Println("new source (click): ", str)
+	cl.qmlimg.Set("source", str)
+}

xml.go

@@ -1,3 +1,4 @@
+// PresentationApp project xml.go
 package main
 
 type _ struct {