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Re: Drawing Map & find countries on Map by C# Application

19-Jul-11 9:43

Mahtab777 wrote:
while load the form,the program(in Runtime),draws a Map on form,for exmple:Map of Asia,itself.

The computer doesn't know how to draw a map of a specific country by itself, that information is not embedded into your PC and will have to be provided by you.

You could import a picture, show it in a PictureBox, and have the user click it. You would than have to translate the location of the pixel to a known country. The easiest way to do that is by coloring different regions with different colors; once you know the pixel where the user clicked, you know what color, and hence, what region.

Bastard Programmer from Hell Suspicious | :suss:

Mahtab77719-Jul-11 17:05

Mahtab777

19-Jul-11 17:05

Hi Thanks for your guideing,
I used this way that you suggest,
but,I don't want to use this way,
I want that Program,itself,draws map on form,& finds out that the user where clicked,

Re: Drawing Map & find countries on Map by C# Application

Pete O'Hanlon19-Jul-11 21:25

Pete O'Hanlon

19-Jul-11 21:25

Them you are going to have to draw the map, and maintain a list of polygons that match the outlines of the regions. Then, when the user clicks on the map, you do a point in polygon check to see if they've clicked in the region.

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Re: Drawing Map & find countries on Map by C# Application

V.20-Jul-11 2:01

20-Jul-11 2:01

if you want to draw it yourself, you'll need a data source that contains all the elements to draw, mostly these are area's (polygons), lines (polylines) and dots, each area or line or dot has certain charactiristics like water, road, ... if you have all that you'll also need to find a way to link all elements and to zoom in/out the map.

In short (I probably forgot to mention most of the stuff anyway) you'll need to find a provider for the geographical stuff. For a fee they'll provide you with some assemblies you can use as well as the database with all information in it (and with updates if necessary).

hope this clarifies things for you.

Re: Drawing Map & find countries on Map by C# Application

Mahtab77720-Jul-11 6:52

Mahtab777

20-Jul-11 6:52

Hi,
Thanks very much!
I want to use the Region class for Drawing Map on form & for Drawing countries on Map,
"Region" can helps me for this program?
Are there another ways for this program?
Are there a classes or components for creating & Drawing Map?

Re: Drawing Map & find countries on Map by C# Application

Eddy Vluggen20-Jul-11 7:22

Re: Drawing Map & find countries on Map by C# Application

20-Jul-11 7:22

Mahtab777 wrote:
"Region" can helps me for this program?

It might, if you have all the borders stored as points somewhere.

Mahtab777 wrote:
Are there a classes or components for creating & Drawing Map?

Not in the Framework; you'll either have to write them or look for something similar.

Bastard Programmer from Hell Suspicious | :suss:

V.20-Jul-11 7:31

20-Jul-11 7:31

What I meant to say is, that if you want to draw a map you probably don't have the know-how (nor do I for that matter) to do it yourself within a reasonable amount of time. Normally such a task takes a lot of design and many resources to do it. If you need a map quickly you probably need a third party component (google maps perhaps?) or as someone already suggested a picture.

scrollbars... *sigh*

l a u r e n19-Jul-11 4:14

19-Jul-11 4:14

this is a really boring question so sorry in advance...

i am writing a pdf viewer (don't ask why or i'll have to kill you) and have most of the code working BUT the scrollbars are driving me slightly nutz

i have the picturebox control set to autosize inside of a panel set to autoscroll

when i set the (generated) image into the picturebox i get a vscrollbar (as expected) and no hscrollbar (again as expected because i resize the form client area to fit the width of the page i'm displaying)

when i shrink the window (with the mouse) i would have expected the hscrollbar to show up but no .. it doesn't

i do catch the form resize event and if the the client area is wider than the page being displayed i change the picturebox size mode to centered so it looks nice

otherwise i have tried all the 217 posts i have read on the net and they all say the same thing and they all don't work for me here

any help greatly appreciated
Smile | :)

"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"

Eddy Vluggen19-Jul-11 6:23

19-Jul-11 6:23

How about dropping your PictureBox (full size) in a Panel, and let the panel worry about scrolling?

Bastard Programmer from Hell Suspicious | :suss:

l a u r e n19-Jul-11 7:42

19-Jul-11 7:42

ummmmm that's what i am doing no?
Confused | :confused:

"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"

Eddy Vluggen19-Jul-11 7:58

19-Jul-11 7:58

With the picturebox as large as the picture is, so it can scroll inside it's container?

The code below worked for me; is your picturebox by any chance smaller than it's container?

public partial class Form1 : Form
{
    Panel somePanel;
    PictureBox somePictureBox;
    public Form1()
    {
        InitializeComponent();

        this.somePanel = new Panel()
        {
            Dock = DockStyle.Fill,
            AutoScroll = true,
        };
        this.somePictureBox = new PictureBox()
        {
            Size = Screen.PrimaryScreen.WorkingArea.Size,
            BackColor = Color.Blue
        };
        this.somePanel.Controls.Add(somePictureBox);
        this.Controls.Add(this.somePanel);
    }
}

Bastard Programmer from Hell Suspicious | :suss:

l a u r e n19-Jul-11 8:45

19-Jul-11 8:45

eddy thnx for the reply again

i see that you are making your picturebox a fixed size yes?

mine has to change as they zoom in and out of the "image" as well as scroll

i have it kind of working (god only know how) but i know the code is horrendous as it has a bunch of "magic fudge factors" in it as i am not familiar enough with .NET / C# and graphics etc

i think i am not getting the actual screen dpi for the bitmap dpi, as that means i need to do some rather opaque calcs on the scaling factor for the pdf renderer and and and... *sigh*

i think if i had a fixed size picturebox the code would work properly as that is a "trivial" case yes?

"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"

Eddy Vluggen19-Jul-11 9:08

19-Jul-11 9:08

l a u r e n wrote:
i see that you are making your picturebox a fixed size yes?

Yup

l a u r e n wrote:
i think if i had a fixed size picturebox the code would work properly as that is a "trivial" case yes?

It should be. You could try putting the PictureBox in a fixed-size container, and have that in a scrollable Panel again.

l a u r e n wrote:
i have it kind of working

In a typical Dilbert-comic that gets translated to "it's ready to ship"! Cool | :cool:

Bastard Programmer from Hell Suspicious | :suss:

l a u r e n19-Jul-11 9:40

19-Jul-11 9:40

hehe yah no... not in my world

right now it is working but i *know* parts of it are not written properly so i have to figure those bits out and make them right

i have a proof of concept that is *good enough* to show the general approach and UI work but that sure as hell isn't a "product"

last 10% of the code == 90% of the time

*sigh*

anyways i will be asking embarrassingly dumb questions in the next few days i'm sure but that's what 9yrs of web dev does for a programmer
Unsure | :~

"mostly watching the human race is like watching dogs watch tv ... they see the pictures move but the meaning escapes them"

Eddy Vluggen19-Jul-11 10:31