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Hi,
IMO that is all wrong from the very start. A Control_Paint handler is supposed to paint the control to the screen, yours modifies an image and does not paint to the screen at all.
This is how I would probably tackle this:
1. I'd have a Compose method that creates the composite image, by allocating a Bitmap of the right size, calling CreateGraphics() on it; then using that Graphics to paint the image and the rectangle and the text into the Bitmap.
2. I would call the Compose method when the composition has to change, which is unrelated to the user deciding to see, not see, scroll it.
3. Then show that Bitmap to the user; as I don't like PictureBox much, I probably would use a Panel of the right size, and use Graphics.DrawImage in its Paint handler.
The main advantages of such approach are:
- all parts of the composition are dealt with in the same way, they share the coordinate system, the mouse actions (if any), etc. No hassle with a PictureBox that may zoom/pan/center/fill the image, and treat everything else you draw on top of it in a different way.
- the composite image is available at all times; you can easily save it to disk, and to a database.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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1. I'd have a Compose method that creates the composite image, by allocating a Bitmap of the right size, calling CreateGraphics() on it; then using that Graphics to paint the image and the rectangle and the text into the Bitmap.
for this have done the below code in mouse down event
if (mybitmap == null)
{
mybitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height, pictureBox1.CreateGraphics());
}
is this correct..
and I can't get the 2 and 3rd point. I have place the picture box in side the panel.
Please explain with ex:
I am new to C# (i am learning guy)
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Nivas82 wrote: mybitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height, pictureBox1.CreateGraphics());
That probably is correct and unnecessary, I've never felt a need to do it like that; a simple new Bitmap(pictureBox1.Width, pictureBox1.Height) is sufficient in almost all cases.
If you're new at something, I suggest you read and study the subject. I always recommend studying books, as they tend to be consistent and thorough; I do not recommend a particular book though, that depends on your background and the writing style you prefer.
Once the basics are covered, I recommend reading articles, CodeProject has a lot of very good ones. I did create a little one on graphics you migt find useful: http://www.perceler.com/articles1.php?art=animation1[^]. It does not involve a PictureBox, as I consider that a stupid and pretty useless Control.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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Hi,
I got the output as i expected. I Place the picture box size with original image size and its works as expected (initially tried with picture box size mode as "zoom") .
replace or add the below code in the previous once at appropriate areas.
In open tool strip menu
pictureBox1.Image = image;
pictureBox1.Size = image.Size;
piturebox paint event
e.Graphics.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect);
g.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect);
in Save tool tip
bac = pictureBox1.Image;
using (Graphics g = Graphics.FromImage(bac))
{
g.DrawImage(mybitmap,0,0);
}
bac.Save(filename, ImageFormat.Jpeg);
modified on Saturday, May 29, 2010 2:12 AM
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Or you can add the original image width and height to bitmap (without changing the size of the picture box).
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (mybitmap == null)
{
mybitmap = new Bitmap(sz.Width, sz.Height);
}
rect = new Rectangle(e.X, e.Y, 0, 0);
this.Invalidate();
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Hi Experts,
First of all sorry for not figuring out a proper subject line for the problem i am facing.
Consider that I have 3 projects with me.
1. DefineEnum
2. UseEnumInMethod
3. UseMethod
The first project defines an enum just like any other project i.e.
public enum MyEnum
{
value1 = 0,
value2 = 1
}
The second project i.e. "UseEnumInMethod" has a method defined in it which has the above mentioned enum as a type to its parameter as
public void UseDefinedEnums(MyEnum _enum)
{
}
I can get the "MyEnum" as a type to the parameter of the method here by adding the project reference of "DefineEnum" in project "UseEnumInMethod".
Now when i want to use the above method in my third project i.e. in "UseMethod" I have to give the reference of both the projects 1 and 2 in the 3rd project if I want to use it as follows.
public void Test()
{
UseDefinedEnums(MyEnum.value1);
}
My question here is, is it possible to avoid giving the reference of the 1st project in the 3rd project and still avail the above functionality?
Anyone Please help!
Thanks in advance!
Regards,
Samar
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dashingsidds wrote: is it possible to avoid giving the reference of the 1st project in the 3rd project and still avail the above functionality?
Consider the problem, if you do not give the reference then how is the compiler to determine what you mean when you refer to a MyEnum variable?
It's time for a new signature.
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Hi Richard,
That is the exact challenge i am facing. In my scenario i cannot give the reference of the 1st project in the third project as i have mentioned. And if I do not give the reference, the third project will not know if the enum "MyEnum" actually exists just as you have mentioned.
Maybe i need to create a wrapper in the second project which will expose the enum declared in the first project but i am unable to figure out how am i suppose to go about doing that.
Regards,
Samar
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dashingsidds wrote: i cannot give the reference of the 1st project in the third project
OK, but you have not explained why you cannot do this, or what problem you are trying to solve. Maybe if you explain a bit more about what you are trying to do we can offer some suggestions.
It's time for a new signature.
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dashingsidds wrote: i cannot give the reference of the 1st project in the third project
You'll have a hard time defending that statement.
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Hi PIEBALD,
I can defend that.
My team here is building a framwork which will have a single assembly which will be used in further projects. The requirement from the client here is this framework should contain just 1 assembly and not more than that. Now while building this framwork we realised that we had to create 2 assemblies instead of 1 (please dont ask why  ) , in my example above, project 1 and 2. Now just as i said we cannot give 2 assemblies to the client which will reference in his project that is why all this head-breaking is goin on here.
I hope i have defended my stance well.
Regards,
Samar
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You didn't defend "cannot" -- the actual inability to do it; you merely stated a prohibition not to do it.
Then you must have everything in one assembly.
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dashingsidds wrote: is it possible to avoid giving the reference of the 1st project in the 3rd project and still avail the above functionality?
No. If you try to use the 2nd project in the 3rd project, then ALL of the items that the 2nd project is dependent on must be satisfied in the 3rd project.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Hmm. I see your point Pete.
But just a thought, is it possible that we create a wrapper (a class maybe) in the second project which will expose the functionality given in the first project?? The only problem here is i am unable to figure how am i suppose to do that!!
Regards,
Samar
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If you are defining it in your 2nd project, then what purpose does the 1st one serve?
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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It is possible, but notice, that you have (in the project 2, your "wrapper") a public method that takes enum you want to hide as a parameter. Therefore project 3 must know what this enum is (event if it didn't use the method). If you redesign the middle layer, so it doesn't expose your enum anywhere it should work probably work as you want, but a question arrises if it's worth the effort.
But, there's "but". Even if you redesign it, and you won't have reference to project 1 from project 3, output of the project 1 (dll) will still make it to the output of the application.
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dashingsidds wrote: My question here is, is it possible to avoid giving the reference of the 1st project in the 3rd project and still avail the above functionality?
No. Unless you use a web service to expose your first project. You would then be generating a proxy for your this class in wherever you want to consume your web service.
My signature "sucks" today
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dashingsidds wrote: Now when i want to use the above method in my third project i.e. in "UseMethod" I have to give the reference of both the projects 1 and 2 in the 3rd project if I want to use it as follows.
public void Test()
{
UseDefinedEnums(MyEnum.value1);
}
My question here is, is it possible to avoid giving the reference of the 1st project in the 3rd project and still avail the above functionality?
Hi Samar,
You can't do it as you are using both the two projects inside the third one. You must have to add the reference of the two projects in the third one.
Don't forget to Click on [Vote] and [Good Answer] on the posts that helped you.
Regards - Kunal Chowdhury | Software Developer | Chennai | India | My Blog | My Tweets | Silverlight Tutorial
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This is analogous:
here is a method that calculates the square of a number:
public static Number Square(Number aNumber) {...}
now start using it.
BTW I will not tell you what Number is.
You should see immediately it can't be done, how can you use something when it relies on stuff that is not available?
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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Hi Luc,
I get your point here but i think you misunderstood me a little.
I know it is not possible to get a class which is not present anywhere in the project or in the referenced assemblies.
What I was thinking here is, if possible, we can build a wrapper class in the second project which will expose the methods in the first project. In this way the second project's assembly will contain the methods of the first assembly as well and hence need not give an explicit reference of the first project in the third project. The problem here is i am unable to figure out how am i going to do that??? 
I hope u r getting me here. If this is not possible then i am willing to leave trying this.
Regards,
Samar
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in your example, the method of the middle DLL was using a type from the first DLL as a parameter, hence that type had to be available to the final EXE.
if none of the public API of DLL 2 needs types from DLL 1, then of course your EXE would not care about DLL 1 itself, as all it sees is the public stuff of DLL 2. The EXE is not interested in how DLL 2 is implemented, nor what it may need internally. That is normal when using libraries, packages, etc.
Example: when I use a WebBrowser, it relies on several DLL (I admit, those probably are unmanaged) thast belong to Internet Explorer; my app does not need to know any detail, as all the API parts of WebBrowser are regular .NET types.
So you can wrap methods; you can hide classes and types in general. But you cannot actively use classes/types without knowing them.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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So Luc you are saying there is no way i can refer the methods or classes from the 1st project in the 3rd project without referencing it??? Not even by creating a wrapper class or something in the second project and then using that wrapper class in the third project?? Hmm.. A little hard to believe, for me atleast..
Thanks a million for your time and help Luc.
Regards,
Samar
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dashingsidds wrote: So Luc you are saying there is no way i can refer the methods ...
That is not what I said; you can refer everything that is public as long as you know all the types required to access it: the type that contains the method, the parameter types and the return type.
If I sell you a graphics package and deliver one DLL, you can use it by adding a reference to it in your project, and referring to whatever is public.
When I release a version 2, I may have split the DLL in seven DLLs; as long as one of them still has the original name and makes the original types available, for you nothing has changed. How things are organized amongst those seven DLLs is of no concern of yours. What I should not do, is migrate a public type from the original DLL to some other DLL though; if I did that, you would need a reference to access that type.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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Hmm... I got that. So how do I apply the thing you just said in my scenario??? Or what do I need to change to make this work???
Please note that in my case creating 2 assemblies is inevitable. Also I cannot provide more than 1 assembly to the client.
Please advice.
Regards,
Samar
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Hi All
I downloaded a library to compress files into zip archives...
I am now trying to add an event handler (or any other type of handler) that will monitor the progress of the compression.
This is the code to compress the files: (I have marked where I am having difficulty)
using (ZipFile zip = new ZipFile())
{
zip.CompressionLevel = Ionic.Zlib.CompressionLevel.BestCompression;
ZipEntry e = zip.AddFile(ex1);
e = zip.AddFile(ex2);
zip.AddProgress += new ProgressChangedEventHandler(saveProgress);
zip.Save(compressedFile);
}
This is the code to track the changes:
private void saveProgress(Object sender, SaveProgressEventArgs e)
{
switch (e.EventType)
{
case ZipProgressEventType.Saving_Completed:
Console.WriteLine("Save Complete");
sendFile("Compressed/Package.zip");
break;
case ZipProgressEventType.Saving_Started:
Console.WriteLine("Saving Started...");
break;
default:
Console.WriteLine("Saving...");
break;
}
}
I am not sure how to go about adding an eventhandler to the zip to monitor the progress.
Thanks for all those who can assist!
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