add a preview image to the qml form

imgprovider.go

@@ -0,0 +1,21 @@
+// imgprovider.go
+package main
+
+import (
+	"fmt"
+	"image"
+	"strconv"
+)
+
+/*var imgproviderstr = `import QtQuick 2.4
+
+Image {
+    source: "image://images/`*/
+
+func imgProvider(id string, width, height int) image.Image {
+	var i int
+	fmt.Println("id: ", id)
+	i, _ = strconv.Atoi(id)
+	fmt.Println("haha: ", i)
+	return slides[i].getImage(width, height)
+}

main.go

@@ -18,14 +18,16 @@ import (
 type cell struct {
 	text    string
 	img     imagick.Image
+	qmlimg  qml.Object
 	qmlcell qml.Object
 	index   int
 }
 type slide []*cell
 
 var (
-	x, y        int
+	x0, y0      int
 	path        string
+	qimg        qml.Object
 	textEdit    qml.Object
 	cellQml     qml.Object
 	window      *qml.Window
@@ -62,6 +64,8 @@ func run() error {
 	}
 
 	engine := qml.NewEngine()
+	engine.AddImageProvider("images", imgProvider)
+
 	path, err = osext.ExecutableFolder()
 	path = filepath.Clean(path + "/../src/github.com/lordwelch/PresentationApp/")
 
@@ -75,6 +79,11 @@ func run() error {
 		return err
 	}
 
+	qimg, err = engine.LoadFile(path + "/qml/img.qml")
+	if err != nil {
+		return err
+	}
+
 	window = mainQml.CreateWindow(nil)
 
 	textEdit = window.ObjectByName("textEdit")
@@ -94,9 +103,9 @@ func run() error {
 func setupScene() {
 
 	gl.ClearColor(0.1, 0.5, 0.9, 0.0)
-	mw1 = resizeImage(mw1, x, y, true, true)
+	mw1 = resizeImage(mw1, x0, y0, true, true)
 
-	tex1 = newTexture(*mw1)
+	tex1 = newTexture(*slides[0].getImage(x0, y0))
 
 	gl.MatrixMode(gl.PROJECTION)
 	gl.LoadIdentity()
@@ -130,16 +139,7 @@ func drawSlide() {
 
 }
 
-func newTexture(mw imagick.MagickWand) uint32 {
+func newTexture(rgba image.RGBA) uint32 {
-	x1 := mw.GetImageWidth()
-	y1 := mw.GetImageHeight()
-	rgba := image.NewRGBA(image.Rect(0, 0, int(x1), int(y1)))
-	if rgba.Stride != rgba.Rect.Size().X*4 {
-		panic("unsupported stride")
-	}
-	TPix, _ := mw.ExportImagePixels(0, 0, x1, y1, "RGBA", imagick.PIXEL_CHAR)
-	rgba.Pix = TPix.([]uint8)
-
 	var texture1 uint32
 	gl.Enable(gl.TEXTURE_2D)
 	gl.GenTextures(1, &texture1)
@@ -164,27 +164,30 @@ func checkMon() {
 	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")
-		x = 800
+		x0 = 800
-		y = 600
+		y0 = 600
-		win, err = glfw.CreateWindow(x, y, "Cube", nil, nil)
+
+		win, err = glfw.CreateWindow(x0, y0, "Cube", nil, nil)
 		if err != nil {
 			panic(err)
 		}
 		projMonitor = monitors[0]
 	} else {
 		fmt.Printf("You have %d monitors\n", i)
-		x = monitors[1].GetVideoMode().Width
+		x0 = monitors[1].GetVideoMode().Width
-		y = monitors[1].GetVideoMode().Height
+		y0 = monitors[1].GetVideoMode().Height
-		win, err = glfw.CreateWindow(x, y, "Cube", nil, nil)
+		win, err = glfw.CreateWindow(x0, y0, "Cube", nil, nil)
 		fmt.Println(win.GetPos())
 		win.SetPos(monitors[1].GetPos())
-		fmt.Println(x, y)
+		fmt.Println(x0, y0)
 		if err != nil {
 			panic(err)
 		}
 		projMonitor = monitors[1]
+
 	}
 	monitorInfo()
 
@@ -259,6 +262,25 @@ func setSignals() {
 
 }
 
+func (cl cell) getImage(x, y int) (img *image.RGBA) {
+	mw := imagick.NewMagickWandFromImage(&cl.img)
+	if (x == 0) || (y == 0) {
+		x = int(mw.GetImageWidth())
+		y = int(mw.GetImageHeight())
+	}
+
+	mw = resizeImage(mw, x, y, true, true)
+	img = image.NewRGBA(image.Rect(0, 0, int(x), int(y)))
+	if img.Stride != img.Rect.Size().X*4 {
+		panic("unsupported stride")
+	}
+	//	TPix, _ :=
+	Tpix, _ := mw.ExportImagePixels(0, 0, uint(x), uint(y), "RGBA", imagick.PIXEL_CHAR)
+	img.Pix = Tpix.([]uint8)
+	defer mw.Destroy()
+	return
+}
+
 func (cl *cell) setSignal() {
 	cl.qmlcell.ObjectByName("cellMouse").On("doubleClicked", func() {
 
@@ -280,17 +302,28 @@ func (cl *cell) setSignal() {
 func (sl *slide) addCell( /*cl *cell*/ ) {
 	var cl cell
 
-	cl.qmlcell = cellQml.Create(nil)
-	cl.qmlcell.Set("objectName", fmt.Sprintf("cellRect%d", cl.index))
-	cl.qmlcell.Set("parent", window.ObjectByName("data1"))
-
 	cl.index = len(*sl)
 
+	cl.qmlcell = cellQml.Create(nil)
+	cl.qmlcell.Set("objectName", fmt.Sprintf("cellRect%d", len(*sl)))
+	cl.qmlcell.Set("parent", window.ObjectByName("data1"))
+	cl.qmlcell.Set("index", cl.index)
+
+	mw := imagick.NewMagickWand()
+	mw.ReadImage("logo:")
+	cl.img = *mw.GetImageFromMagickWand()
+
 	cl.text = "testing 1... 2... 3..."
 	cl.qmlcell.ObjectByName("cellText").Set("text", cl.text)
 	*sl = append(*sl, &cl)
 	cl.setSignal()
 
+	cl.qmlimg = qimg.Create(nil)
+	cl.qmlimg.Set("objectName", fmt.Sprintf("cellImg%d", cl.index))
+	cl.qmlimg.Set("source", fmt.Sprintf("image://images/%d", cl.index))
+	cl.qmlimg.Set("parent", window.ObjectByName("data2"))
+	cl.qmlimg.Set("index", cl.index)
+
 }
 
 func (cl cell) String() string {

main.qml

@@ -3,6 +3,7 @@ import QtQuick.Dialogs 1.2
 import QtQuick.Controls 1.3
 import QtQuick.Window 2.0
 import "qml"
+import QtQuick.Layouts 1.2
 
 ApplicationWindow {
     id: applicationWindow1
@@ -91,7 +92,7 @@ ApplicationWindow {
                     transformOrigin: Item.TopLeft
                     border.width: 0
 
-                    Column {
+                    ColumnLayout {
                         id: data1
                         objectName: "data1"
                         spacing: 1
@@ -108,11 +109,12 @@ ApplicationWindow {
                     color: "#4f90e2"
                     border.width: 0
 
-                    Column {
+                    ColumnLayout {
                         id: data2
                         spacing: 1
                         objectName: "data2"
                         anchors.fill: parent
+
                     }
                 }
             }

qml/AboutDialog.qml

@@ -1,4 +1,4 @@
-import QtQuick 2.2
+import QtQuick 2.4
 import QtQuick.Dialogs 1.1
 
 MessageDialog {

qml/cell.qml

@@ -1,10 +1,8 @@
-import QtQuick 2.0
+import QtQuick 2.4
 
 Rectangle {
-    enabled: true
     objectName: "cellRect"
     property int index: 0
-    width: 100
     height: 100
     border.width: 2
     border.color: "black"

qml/img.qml

@@ -0,0 +1,16 @@
+import QtQuick 2.4
+
+Image {
+    id: img
+    antialiasing: true
+    source: "image://images/"
+    objectName: "cellImg"
+    property int index: 0
+    height: 150
+    transformOrigin: Item.TopLeft
+    fillMode: Image.PreserveAspectFit
+    anchors.right: parent.right
+    anchors.left: parent.left
+    Layout.minimumHeight: 100
+    Layout.maximumHeight: 200
+}