I am trying to set the seekbar thumb using code not XML
I tried
Drawable a = null;
a = Drawable.CreateFromStream(Assets.Open("Drawable/Icon"),null);
seekBar.SetThumb (a);
also tried:
seekBar.SetThumb() //Adding the image path but it said the it requires a drawable but it was giving it a int
how can i use set the image with code?
also i am using Xamarin free version.
I had the same issue and I solved it with the following code.
Hope it helps
public void seek_bar_ProgressChanged(object sender, SeekBar.ProgressChangedEventArgs e) {
Bitmap img = BitmapFactory.DecodeResource(Resources, Resource.Drawable.yellobar);
Drawable d = new BitmapDrawable(Resources, img);
seek_bar.ProgressDrawable = d;
}
Related
I am using Android.Support.V7.Widget.ListPopupWindow as a Drop-Down Menu from a Button within my layout. Here is the code snippet I am using
void MenuIcon_Click (object sender, EventArgs e)
{
popupWindow = new Android.Support.V7.Widget.ListPopupWindow (this);
popupAdapter = new MenuPopUpAdapter (this,selectedIndex,menuList);
popupAdapter.ItemClick+= PopupAdapter_ItemClick;
popupWindow.SetAdapter (popupAdapter);
popupWindow.AnchorView = menuButton;
Display display = WindowManager.DefaultDisplay;
Point size = new Point();
display.GetSize (size);
int width = size.X;
popupWindow.Width =160;
popupWindow.Show ();
}
But while debugging I noted that, even though I have given it a static width, it is rendered differently in different devices. What is causing this issue ?
This is because of the different screen densities in Android devices. You need to mention dimensions in DPs(Density Independent Pixels) to overcome this issue. This documentation from Google will be a nice read
You can get the corresponding pixel value to be mentioned while setting dimensions programatically from this method.
public int dpToPx(int dp) {
DisplayMetrics displayMetrics = Resources.DisplayMetrics;
int px = (int)Math.Round(dp * (displayMetrics.Density));
return px;
}
You may modify the code as above to fix the issue
popupWindow.Width =dpToPx(160);
im searching for a good imaging SDK for windows phone ...
i tried to use Nokia SDK but it didn't work for me, it keeps showing as exception:
"Operation Is Not Valid Due To The Current State Of The Object."
here is my test code:
The processImage method is used to apply the filter on the image.
private async void processImage()
{
WriteableBitmap writeableBitmap = new WriteableBitmap((int)bitmapImage.PixelWidth, (int)bitmapImage.PixelHeight);
try
{
using (var imageStream = new StreamImageSource(photoStream))
{
// Applying the custom filter effect to the image stream
using (var customEffect = new NegateFilter(imageStream))
{
// Rendering the resulting image to a WriteableBitmap
using (var renderer = new WriteableBitmapRenderer(customEffect, writeableBitmap))
{
// Applying the WriteableBitmap to our xaml image control
await renderer.RenderAsync();
imageGrid.Source = writeableBitmap;
}
}
}
}
catch (Exception exc) { MessageBox.Show(exc.Message + exc.StackTrace, exc.Source, MessageBoxButton.OK); }
}
This is the NegateFilter class:
namespace ImagingTest
{
class NegateFilter : CustomEffectBase
{
public NegateFilter(IImageProvider source) : base(source){}
protected override void OnProcess(PixelRegion sourcePixelRegion, PixelRegion targetPixelRegion)
{
sourcePixelRegion.ForEachRow((index, width, pos) =>
{
for (int x = 0; x < width; ++x, ++index)
{
targetPixelRegion.ImagePixels[index] = 255 - sourcePixelRegion.ImagePixels[index];
}
});
}
}
}
any ideas for a good imaging SDK? like ImageJ on java for example, or OpenCV ..
i will be better to use Nokia SDK ..
thx :)
I looked in to you code and did a quick test.
The code worked fine when I just made sure that the bitmapImage.PixelWidth and bitmapImage.PixelHeight > 0.
I did not get and image on the screen but when I remove your custom filter the image is show.
I hope you will continue to use the SDK since it is a great product.
What about emguCV?
I am not try it yet but looks like it's possible with phone's camera.
Could anyone please help me , how I can programmatically increase or decrease the font size of web browser control in windows phone 7 c sharp . I need this to implement the zoom functionality in web browser control.
here is my code
private void btn_zoomin_click(object sender, EventArgs e)
{
double fs = webBrowser1.FontSize;
webBrowser1.FontSize = fs+10;
}
But the font is not being changed at all.
Any kind of help will be appreciated.
Many thanks,
Munazza
Yes there is a solution, you can fire a script inside the html page to enlarge the font by using the webBrowser's "InvokeScript" , here is a sample:
webBrowser1.InvokeScript("ChangeFontSize","12");
TO DO : a script inside the html :
<script type="text/javascript">
function ChangeFontSize(size) {
.....
....
return true;
}
<script/>
I don't think it's supposed to work this way.
The user can zoom in and out like he does in the Internet Explorer, but you can't change the font size.
You could, technically, get the html file that you want to display, parse it and if the fontsize is defined inline, you could change it and then display the new html file in the WebBrowser control, but I don't think that's a very good idea.
You have to use WebBrowser.InvokeScript:
// Initial text size
int textSize = 100;
private void TextPlusOnClick(object sender, EventArgs e)
{
textSize *= 2;
string szfn = "{styleText = \"body { -ms-text-size-adjust:" + textSize + "% }\";styleTextNode = document.createTextNode(styleText);styleNode = document.createElement(\"style\");styleNode.appendChild(styleTextNode);document.getElementsByTagName(\"head\")[0].appendChild(styleNode);};";
webBrowser.InvokeScript("eval", szfn);
}
private void TextMinusOnClick(object sender, EventArgs e)
{
textSize /= 2;
string szfn = "{styleText = \"body { -ms-text-size-adjust:" + textSize + "% }\";styleTextNode = document.createTextNode(styleText);styleNode = document.createElement(\"style\");styleNode.appendChild(styleTextNode);document.getElementsByTagName(\"head\")[0].appendChild(styleNode);};";
webBrowser.InvokeScript("eval", szfn);
}
See a description on the text size adjust property and this post on MSDN.
i am showing images from server. In server image is changing in every second. I want that in my application image should be change automatically after one second.M new in windows 7 programming. Kindly suggest me where i am lacking in concept. M using this code.
This process will start when i will tab on my image.
private void image1_Tap(object sender, GestureEventArgs e)
{
System.Windows.Threading.DispatcherTimer dt = new System.Windows.Threading.DispatcherTimer();
dt.Interval = new TimeSpan(0, 0, 0, 0, 1000); // 500 Milliseconds
dt.Tick += new EventHandler(dt_Tick);
dt.Start();
}
This is calling this method .
void dt_Tick(object sender, EventArgs e)
{
status.Text = "chking" + counter++;
// Do Stuff here.
image1.Source = null;
Uri imgUri = new Uri(base_url,UriKind.Absolute);
BitmapImage BI = new BitmapImage(imgUri);
int H = BI.PixelHeight;
int w = BI.PixelWidth;
image1.Source = BI;
}
In this code my Counter is working fine and status.Text is sucessfully change in every second. But image is changing once after that its not changing.
Kinldy suggest me where i am commiting mistake.
Thanks in advance
Gaurav Gupta
I think you should declare System.Windows.Threading.DispatcherTimer dt = new System.Windows.Threading.DispatcherTimer(); as a member variable instead of declaring it in the images tap event.
I do the same thing when grabbing images from a camera in my wp8 app. I hold the URL including the current datetime-value as a url-param in my viewmodel. When i want to refresh, i just reset my URL-property.
Here's my sample:
this.MyUrlProperty = string.Format("{0}?timestamp={1:yyyy-MM-dd HH:mm:ss:fff}", _originalCameraUrl, DateTime.Now);
Works great for me...
I have a list on images in a Pivot control. If you touch an image, it navigates to another view. If if flick through a new pivot and touch the image meanwhile, it navigates.
I noticed the Facebook app or the native photo albums don't have this bug.
Any idea ?
edit: the code :
Image img = new Image();
Delay.LowProfileImageLoader.SetUriSource(img, new Uri(adViewModel.Photos[k].ThbUrl));
img.Width = 150;
img.Tag = k;
img.Height = 150;
img.MouseLeftButtonDown += new MouseButtonEventHandler(launch_Diapo);
Grid.SetRow(img, i);
Grid.SetColumn(img, j);
PhotosGrid.Children.Add(img);
If you can show your code we can probably provide a more specific answer.
However:
I'm guessing you're using MouseButtonLeftDown or similar to detect the touching of the image. Rather than this, use the Tap gesture from the toolkit. This should prevent the issue you're having.
There is a possible alternative to disable the pivot gesture while you're touching the image, but depending on how you're using the image within the pivotItem this may end up preventing proper pivot navigation.
You can add the Tap event in code like this:
var gl = GestureService.GetGestureListener(img);
gl.Tap += new EventHandler<GestureEventArgs>(gl_Tap);
and the handler would be something like this. (but actually doing something useful-obviously.)
void gl_Tap(object sender, GestureEventArgs e)
{
MessageBox.Show("tapped");
}
Even I had a similar problem . What i did is ,check for MouseButtonLeftDown position and MouseButtonLeftUp position .If they are Equal navigate else do nothing .I will paste the code below.
Point temp;
void img_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
temp = e.GetPosition(null);
}
void img_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Point point = e.GetPosition(null);
if (point == temp)
{
this.NavigationService.Navigate(new Uri(...));
}
}