I need to recreate a program similar to whatsapp that can send and receive messages, images videos and audio. I have created a WPF form to show messages that looks like this:
I have a stack panel that contains text bubbles on them. Text messages work fine but if I send an image I want the user to be able to click on the image text bubble and it must become full screen. The image text bubble consists of a label that has a frame in it and then within that frame the image is stored. The label was used since we could resize the label.
However, because the image is done like this dynamically, we cannot seem to register an on-click event on this image bubble. If you have any better ways that we can display the image or how to log this event it would be much appreciated. Here is the method used to add the image.
public void AddMessage_Image(string path, string displayName, int role, string date = "")
{
//Create an image from the path
ImageBrush image = new ImageBrush();
image.ImageSource = new BitmapImage(new Uri(path, UriKind.Absolute));
image.Stretch = Stretch.Uniform;
//Create a frame in which to place the image
Frame fr = new Frame();
fr.Background = image;
fr.MinHeight = 120;
fr.MinWidth = 160;
//Ensure scalabilty of the image
Viewbox vb = new Viewbox();
vb.Child = fr;
vb.Stretch = Stretch.Uniform;
//Place the image in a sizable container
Label lbl = new Label();
lbl.MinHeight = 10;
lbl.MinWidth = 10;
lbl.MaxHeight = 300;
lbl.MaxWidth = 400;
lbl.Content = vb;
if (role == (int) Role.Sender)
lbl.HorizontalAlignment = HorizontalAlignment.Right;
else
lbl.HorizontalAlignment = HorizontalAlignment.Left;
lbl.Background = Brushes.Black;
//Place the image in the chat
chatbox.Children.Add(lbl);
}
Derived from Jeff S's methodology found here, I can add a "Checkbox" to a PDF page like so:
PdfPTable tblFirstRow = new PdfPTable(5);
tblFirstRow.SpacingBefore = 4f;
tblFirstRow.HorizontalAlignment = Element.ALIGN_LEFT;
. . . // code where textboxes are added has been elided for brevity
PdfPCell cell204Submitted = new PdfPCell()
{
CellEvent = new DynamicCheckbox("checkbox204Submitted", "204 Submitted or on file")
};
tblFirstRow.AddCell(cell204Submitted);
doc.Add(tblFirstRow);
The DynamicCheckbox class, based on Jeff S's CustomCellLayout class, is:
public class DynamicCheckbox : IPdfPCellEvent
{
private string fieldname;
private string cap;
public DynamicCheckbox(string name, String caption)
{
fieldname = name;
cap = caption;
}
public void CellLayout(PdfPCell cell, Rectangle rectangle, PdfContentByte[] canvases)
{
PdfWriter writer = canvases[0].PdfWriter;
RadioCheckField ckbx = new RadioCheckField(writer, rectangle, fieldname, "Yes");
ckbx.CheckType = RadioCheckField.TYPE_CHECK;
ckbx.Text = cap;
PdfFormField field = ckbx.CheckField;
writer.AddAnnotation(field);
}
}
My problem is that the checkbox's text (the string assigned to ckbx.Text) is not displaying. The checkbox (outsized) occupies the last cell in the table row, but there is no (visible) accompanying text.
What's missing from my code?
Note: I tried to reduce the size of the checkbox by doing this:
Rectangle tangle = new Rectangle(20, 20);
//RadioCheckField ckbx = new RadioCheckField(writer, rectangle, fieldname, "Yes");
RadioCheckField ckbx = new RadioCheckField(writer, tangle, fieldname, "Yes");
...but that attempt failed - with that code, I can't even "find" the checkbox in the generated PDF file - clicking willy-nilly in column 5 conjures up no checkbox...
Others have answered the label part. The Rectangle that you have called "tangle" needs to be calculated off of the rectangle that comes into the event handler, similar to
Rectangle tangle = new Rectangle(
rectangle.Left,
rectangle.Top - PDFStyle.boxsize - 4.5f,
rectangle.Left + PDFStyle.boxsize,
rectangle.Top - 4.5f
);
Where PDFStyle.boxsize is the width/height of the checkbox and 4.5f is the padding the edge of the cell. Basically the rectangle isn't relative to the cell, but absolute to the page.
As described in ISO-32000-1, a check box is a field of type Button. If you define text for a button, you want to define the text that is displayed on the button. However: in the case of a check box, there is no such text! Instead, you have two appearances, one for the Off value and one for the Yes value.
An educated guess made by an attentive reader would be that you don't want to add text (to the button), but that you want to add a label (for a checkbox). Again you should consult ISO-32000-1 and you'll discover that the spec doesn't say anything about labels for check boxes. The concept just doesn't exist at the level of an AcroForm.
This doesn't mean the concept doesn't exist in general. Many PDF tools allow you to define check boxes that are preceded by a label. When you look inside the PDF, you'll discover that this label is just part of the content, whereas the check box is represented by a widget orientation.
Let's take a look at the official documentation instead of frustrating ourselves searching on every place of the web except on the official web site. More specifically: let's take a look at the Buttons example from Chapter 7 of my book. You'll see that one can set text for a real button:
PushbuttonField button = new PushbuttonField(writer, rect, "Buttons");
button.setText("Push me");
This isn't possible with check boxes (for the obvious reason that the appearance of a check box is completely different). If we want to add a label, we can add it for instance like this:
checkbox = new RadioCheckField(writer, rect, LANGUAGES[i], "Yes");
field = checkbox.getCheckField();
field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", onOff[0]);
field.setAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Yes", onOff[1]);
writer.addAnnotation(field);
ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT,
new Phrase(LANGUAGES[i], font), 210, 790 - i * 40, 0);
You can find the C# version of these examples here: http://tinyurl.com/itextsharpIIA2C07
Creating a checkbox, and then accompanying text to its right, can be done like this:
PdfPCell cell204Submitted = new PdfPCell()
{
CellEvent = new DynamicCheckbox("checkbox204Submitted")
};
tblFirstRow.AddCell(cell204Submitted);
// . . . Chunks and an anchor created; that code has been elided for brevity
Paragraph parCkbxText = new Paragraph();
parCkbxText.Add(Chunk204SubmittedPreamble);
parCkbxText.Add(ChunkBoldNote);
parCkbxText.Add(Chunk204Midsection);
parCkbxText.Add(anchorPayeeSetup204);
PdfPCell cellCkbxText = new PdfPCell(parCkbxText);
cellCkbxText.BorderWidth = PdfPCell.NO_BORDER;
tblFirstRow.AddCell(cellCkbxText);
public class DynamicCheckbox : IPdfPCellEvent
{
private string fieldname;
public DynamicCheckbox(string name)
{
fieldname = name;
}
public void CellLayout(PdfPCell cell, Rectangle rectangle, PdfContentByte[] canvases)
{
PdfWriter writer = canvases[0].PdfWriter;
RadioCheckField ckbx = new RadioCheckField(writer, rectangle, fieldname, "Yes");
ckbx.CheckType = RadioCheckField.TYPE_CHECK;
ckbx.BackgroundColor = BaseColor.ORANGE;
ckbx.FontSize = 6;
ckbx.TextColor = BaseColor.WHITE;
PdfFormField field = ckbx.CheckField;
writer.AddAnnotation(field);
}
}
I am filling a listcontrol (Telerik for WinForms) by using the following code :
public static List<RadListDataItem> GetItems()
{
List<RadListDataItem> items = new List<RadListDataItem>();
for (int i = 1; i <= 10; i++)
{
RadListDataItem toadd = new RadListDataItem();
toadd.TextImageRelation = System.Windows.Forms.TextImageRelation.ImageBeforeText;
toadd.Text = "sssssssssss";
//toadd.Image.
string imagename = "MyProject.SuIcons.d" + i + ".JPG";
toadd.Image = new Bitmap(Assembly.GetExecutingAssembly().
GetManifestResourceStream(imagename));
items.Add(toadd);
}
return items;
}
but, only top portition of every item image is show in listcontrol, I mean I cant see the whole image associated with item in the list.
Would you help me please ?
You should set the AutoSizeItems property of the control to true in order to allow the visual items size themselves according to their content:
radListControl1.AutoSizeItems = true;
You can adjust the item size of the radListView. There is a property ItemSize that you can change in the designer view. Or if you want to do it programmatically, you can do something like this.
radListView1.ItemSize = new System.Drawing.Size(200, 400);
The first parameter is the width and the second is the height.
I'm trying to use the microsoft_maps_mapcontrol. I see how one could create a pushpin and the lat long location... but i can't figure out how to instead use an image in place of that pushpin. doesn't look like pushpin will allow using a different image. So, that being the case how do you create an image and then wire it to the proper spot. Once wired can will i be able to use an event for when that image is clicked on.
thanks
shannon
added 3/2/2010
I've looked at the example given at http://www.microsoft.com/maps/isdk/silverlightbeta/#MapControlInteractiveSdk.Tutorials.UIElements.Media.TutorialPositionPointMedia
and i must not be converting something correctly to vb.
Here is there code
Image image = new Image();
image.Source = new BitmapImage(new Uri(ImageUriValue.Text, UriKind.RelativeOrAbsolute));
double opacity;
if (double.TryParse(OpacityText.Text, out opacity))
{
image.Opacity = opacity;
}
image.ImageFailed += MediaFailed;
Point point = GetPoint();
Canvas.SetLeft(image, point.X);
Canvas.SetTop(image, point.Y);
myCanvas.Children.Add(image);
element = image;
and what i converted it to
Dim image As New Image()
image.Source = New BitmapImage(New Uri("\Images\1.png", UriKind.RelativeOrAbsolute))
Canvas.SetLeft(image, 100)
Canvas.SetTop(image, 100)
myCanvas.Children.Add(image)
element = image
Hopefully that helps in spotting what i'm not doing correctly.
thanks
shannon
Here's a code snippet that should show you how to add an image.
public void addImageToMap()
{
MapLayer imageLayer = new MapLayer();
Image image = new Image();
//Define the URI location of the image
image.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("myimage.png", UriKind.Relative));
//Define the image display properties
image.Opacity = 0.8;
image.Stretch = System.Windows.Media.Stretch.None;
//The map location to place the image at
Location location = new Location() { Latitude = -45, Longitude = 122 };
//Center the image around the location specified
PositionOrigin position = PositionOrigin.Center;
//Add the image to the defined map layer
imageLayer.AddChild(image, location, position);
//Add the image layer to the map
TestMap.Children.Add(imageLayer);
}
http://msdn.microsoft.com/en-us/library/ee681895.aspx
I have a Canvas and a custom control called BasicShape
After I add two BasicShape controls on the Canvas, I want programatically to connect them with a Line and I want to do this using the Binding class.
I want to connect the Bottom side of first shape with the Top side of the second one.
Initially i tried to connect only the X1 property of the Line with the Canvas.Left attached property of the fisrt BasicShape but this doesn't work. Line X1 property is not updated when I change the Canvas.SetLeft(basicShape1) value
BasicShape bs1 = canvas.Children[0] as BasicShape;
BasicShape bs2 = canvas.Children[1] as BasicShape;
Line line = new Line();
line.StrokeThickness = 1;
line.Stroke = new SolidColorBrush(Colors.Red);
line.X1 = 100;
line.Y1 = 100;
line.X2 = 200;
line.Y2 = 200;
canvas.Children.Add(line);
Binding b = new Binding("AnyName");
b.Source = bs1;
b.Path = new PropertyPath(Canvas.LeftProperty);
line.SetBinding(Line.X1Property, b);
I'm trying to create a simple UML diagram like this one
alt text http://www.invariant-corp.com/omechron/images/uml_diagram.gif
I just did it other way, without binding
This will be a permanent link
http://calciusorin.com/SilverlightDiagrams/
I decided to manually update all lines on shape Location or Size changed
private void basicShape_BasicShapeLocationSizeChangedEvent(BasicShape sender)
{
foreach (CustomLine customLine in lines)
{
if (customLine.StartFromShape(sender))
{
Point point = sender.GetLinePoint(customLine.GetStartSide());
customLine.SetStartPoint(point);
}
if (customLine.EndInShape(sender))
{
Point point = sender.GetLinePoint(customLine.GetEndSide());
customLine.SetEndPoint(point);
}
}
}
I am sure that the Binding solution is more elegant. Anyone interested in my solution, with SL Controls that can be resized, connected with lines, just contact me.