I have added images from gallery/camera to an ion-slider view.I have an action sheet which gives me an option to add or remove the images from the slider view.Adding is working fine as i am adding that image to array and providing that updated array to the slider. But for removing an image i need to get the index of the image that is active on the slider and after that i need to remove it. I m not able to get the active index using this code :
onSlideChanged() {
try{
let currentIndex = this.slides.getActiveIndex();
console.log("Current index is", currentIndex);
}catch(e){
console.log("not able to get the active index");
} }
this also goes into the catch part. Then i m removing the first element from the array and updating the array for slider.The array size is reduced when i press the delete button from action sheet but all the images in the slider disappears leaving a blank space.
<div *ngIf="field.value" (click)="takePicture(field.name)">
<ion-slides pager="true" style="max-height:500px" (ionSlideDidChange)="onSlideChanged()">
<ion-slide *ngFor="let c of field.value">
<img class="image-attach" [src]="c" draggable="true">
</ion-slide>
</ion-slides>
</div>
<canvas #latlon style="display:none"></canvas>
</div>
code for setting images to the slider
removePicture(name) {
for (let i = 0; i < this.formType.template.secs.length; i++) {
for (let d = 0; d < this.formType.template.secs[i].fields.length; d++) {
if (this.formType.template.secs[i].fields[d].name == name) {
if(this.formType.template.secs[i].fields[d].value.length>1)
{
this.formType.template.secs[i].fields[d].value.splice(this.currentIndex,1);
this.attachedImagesArray.splice(this.currentIndex,1);
console.log(this.formType.template.secs[i].fields[d].value.length);
var arr = this.formType.template.secs[i].fields[d].value;
console.log("^^^^^^^",arr);
this.formType.template.secs[i].fields[d].value = this.formType.template.secs[i].fields[d].value;
}
else{
console.log("*********",this.formType.template.secs[i].fields[d].value);
this.formType.template.secs[i].fields[d].value = "";
}
}
}
}
};
this is the code i m using for removing the images from slider. I m new to ionic so don't know why this is happening, i googled for it but nothing worked for me.
for putting the images to the slides i m using the following code :
selecPicture(name) {
this.camera.getPicture({
quality: 50,
destinationType: this.camera.DestinationType.FILE_URI,
targetHeight: 500,
targetWidth: 500,
encodingType: this.camera.EncodingType.JPEG,
mediaType: this.camera.MediaType.PICTURE,
sourceType: this.camera.PictureSourceType.PHOTOLIBRARY
}).then((imageData) => {
//alert(imageData);
// imageData is a base64 encoded string DATA_URL FILE_URI 'lat: '+lat+', lon: '+lon,
let base64Image = "data:image/jpeg;base64," + imageData;
this.geolocation.getCurrentPosition().then((resp) => {
let lat = resp.coords.latitude;
let lon = resp.coords.longitude;
this.lat = lat;
this.lon = lon;
let d = new Date();
let draftSavedTime = d.toString().substr(4, 11);
let canvas = this.canvasRef.nativeElement;
let context = canvas.getContext('2d');
console.log(context);
console.log("hello");
let newImg = new Image();
newImg.src = imageData;
newImg.onload = () => {
canvas.setAttribute("width", newImg.height);
canvas.setAttribute("height", newImg.width);
// context.drawImage(newImg, 0, 0);
context.drawImage(newImg, 0, 0, newImg.width, newImg.height);
// context.font = "15px impact";
context.font = "bold 13px Arial";
// context.textAlign = 'center';
context.fillStyle = 'red';
context.fillText(draftSavedTime, 20, 20);
// context.fillText('Lat: '+lat+' Lon: '+lon, canvas.width / 2, canvas.height * 0.9);
context.fillText('Lat: ' + lat, canvas.width * 0.1, canvas.height * 0.8);
context.fillText('Lon: ' + lon, canvas.width * 0.1, canvas.height * 0.9);
// context.fillText('Lon: '+lon, canvas.width / 2, canvas.height * 0.8);
let image = canvas.toDataURL();
this.attachedImages.push(image);
this.setValue(name, image);
};
}).catch((error) => {
console.log('Error getting location', error);
});
}, (err) => {
console.log(err);
});
}
to set the value of image in the field : //to set the value in the field
setValue(name, data) {
console.log(this.attachedImages);
console.log(this.formType.template.secs); //3
for (let i = 0; i < this.formType.template.secs.length; i++) {
console.log(this.formType.template.secs[i].fields); //2
for (let d = 0; d < this.formType.template.secs[i].fields.length; d++) {
if (this.formType.template.secs[i].fields[d].name == name) {
this.attachedImagesArray.push({
name : this.formType.template.secs[i].fields[d].name,
image : data,
number : d
});
var group_to_values = this.attachedImagesArray.reduce(function (obj, item) {
obj[item.name] = obj[item.name] || [];
obj[item.name].push(item.image);
return obj;
}, {});
var imageGroup = Object.keys(group_to_values).map(function (key) {
return {key: key, image: group_to_values[key]};
});
var pre = document.createElement("pre");
pre.innerHTML = "imageGroup:\n\n" + JSON.stringify(imageGroup, null, 4);
document.body.appendChild(pre);
var newArr = [];
newArr.push({imageGroup});
for(var item in newArr)
{
console.log(newArr[item]);
for(var sec in newArr[item])
{
console.log(newArr[item][sec]);
}
for( var elm in newArr[item][sec])
{
console.log(newArr[item][sec][elm]);
}
for( var key in newArr[item][sec][elm])
{
this.arrNameStr = newArr[item][sec][elm].key;
console.log(newArr[item][sec][elm].image);
}
}
console.log(this.arrNameStr);
if(this.arrNameStr.includes(this.formType.template.secs[i].fields[d].name))
{
console.log(newArr[item][sec][elm].image);
console.log(this.formType.template.secs[i].fields[d].value);
this.formType.template.secs[i].fields[d].value = newArr[item][sec][elm].image;
console.log(this.formType.template.secs[i].fields[d].value);
}
}
}
}
};
