C++ :: Digitize Geographical Map Through GUI And Mouse Interaction
Jul 8, 2012
I am developing an application which can be used for digitize a geographical map through GUI and mouse interaction. Well, here are the list of objects that need to be created using mouse clicks.
What will be the best design which can be used to store the data(objects) more efficiently? So that both accessing objects and rendering them will be easier and faster? I have started with Composite Design pattern to store the objects and Visitor Design pattern to render these objects.
[Code] .....
But everytime rendering is done sequentially. Will not this take more time if the number of objects increases?
I am preparing for an exam, and I am being told there will be, "1 multiple-choice question about reading a piece of code about objects interacting with functions and deciding the output."
There are a few ways I can think of:
- Passing an object into a function as an argument - An object calling a function with a dot operator - Creating a new object through a Constructor and Class(Does that count?)
Are there other ways that objects interact with functions that I am not thinking of?
It is commonly seen that computational applications accept data in notepad or excel formats to do the process on. The question is how would they do that? Do they store the notepad data somewhere in the application memory or they interact with the notepad file all the time program is running? This is my first try developing a small application .
Code: #include <algorithm> #include <winsock.h> void some_func() { int result = std::min (0, 16384); }
Okay, but the above code consistently gives me error C2589: '(' : illegal token on right side of '::'. I'm building with VC8. If I don't #include <winsock.h> the code compiles correctly but it doesn't matter if I #include <winsock.h> before or after including <algorithm>
I guess it might be due to one of my #defines but I've tried the code in a very minimal program and I still get the error.
I will sketch the scenario I would like to get working below. I have one main application.
That application, based on user interactions, can load other applications in a secure shell. This means these child applications cannot interact with the OS anymore, nor with each other.
The parent program can at any time call functions of these child programs.
The child program can at any time call functions of these parent programs.
How to implement this in C++? Preferably both parent and child should be written in C++.
The performance of loading the child applications doesn't matter. The only thing that matters is the performance of the communication between child and parent.
I have an assignment to do a calculator in C, wich will work by clicking the numbers with the mouse, however i have a bug that when i hold the mouse and dragg it, it assumes that I'm clicking multiple times, also, when I click in an empty space the program creates a blank space on the calculator screen.
Code:
#include <stdio.h> #include <conio.h> #include <math.h> #include "..MouseHandler.h" // ajustar o caminho ao seu projecto #include "..calcSkinLib.h" // ajustar o caminho ao seu projecto #define PI = 3.1415;
i was trying to write a program in c language which can detect mouse movement, but the program which i have written can only detect the mouse click or scroll the program which i have written given below..
Code:
#include<stdio.h> #include<string.h> #include <ncurses.h> int main() { }
[code]....
run the programme with linked-lncurses. improve my program which also detect when the mouse moves.
i have to make an application called " paint " in c++ . It should facilitate user to draw different shapes using a mouse. Now the biggest hurdle i am facing is the usage of mouse .. what is the header file for usage of mouse ? i am using visual studio 2010 . the syntax is creating problems ..
i would like to add a image box to my application which shows a view/picture where ever my mouse is pointing. something like windows magnifier but it must not zoom in anything it must just display in picture box what your pointer is on.
So basically you have a picture box 504, 86 okay in a form when you move your cursor of mouse around desktop what ever you look at it will be visible inside picture box.
I have a direct2d application and I want to be able to detect mouse clicks. One example is, (in my borderless window) I would like to have an X at the top right of the screen, that when clicked would close the window. How can I do something like this?
I have a game that I'm trying to create but I don't really know how to handle mouse motions yet. I have read the LazyFoo.net lesson 9. And I have too searched around on Google but haven't find any good article for what I want to do
But what I want is to check if the mouse is OVER the START button of the game and if the user has pressed the LEFT mouse button the game should START.
This works when I am hovering over the area there I want the mouse to do something:
Code: else if (event.type == SDL_MOUSEMOTION) { if (event.motion.x == 0) { quit = true; } }
I do not know how to check this. The START and QUIT button is in the middle of the screen and I don't know how to position the mouse there either.
I am using SDL 2.0. But I don't know how to handle mouse input. Do you think you can explain of how to do that? Or give me a link that explains that really great?
I know how to handle a mouse button that presses down for a sec.
Code: if (event.type == SDL_MOUSEBUTTONDOWN){ if (event.button.button == SDL_BUTTON_LEFT){ // Do something . . . } }
But not how to handle the mouse input of what the mouse is hovering over and that.
Like in a start menu of a game. I want a button for example to appear blue when I hover over it and when I click on it. It should start the game for example.
I want to track the mouse movement. I know that GTk+ provides some powerful libraries for creating GUI, that will, among other things, enable me to write handlers for mouse movement events, but I'm looking for a simpler, more compact capabilities for now.
Is there a low level C library that will enable me to interface with the mouse?
POINT p; for (int i = 0;; ++i) { HWND hwnd = GetConsoleWindow(); system("cls"); if (ScreenToClient(hwnd, &p)) { //p.x and p.y are now relative to hwnd's client area } cout << p.x << " " << p.y; Sleep(200); }
I'm looking for a function that gives current mouse position(x and y) in that particular console window. I've tried above code but it is not working.
Essentially the problem is that when I click the mouse, the program doesn't seem to record the coordinates. So the if statements are never executed. The problem could also be with the if statements, I'm not sure.
One thing I noticed was that when the do while loop is running and the left mouse button is not pressed then X and Y of dwMousePosition are both 0. But then if I press the left mouse button then the coordinates become x = 1 and y = 0.
NOTE I'm on Windows 7, 64 bit, using Visual Studio Express 2013 for Windows Desktop
I have looked on this website and stumbled across this link: [URL] .....
My question is can how do I use that code when im console programming?
When I try this code I get errors.
" line |14|error: initializer expression list treated as compound expression|" " line |17|error: a function-definition is not allowed here before '{' token|" "line |40|error: expected '}' at end of input|"
Code: #include <iostream> using namespace std; int main() { int MouseMove(100,100); void MouseMove (int x, int y ) {
I am trying to detect keys pressed on a keyboard and mouse on both, Windows and Linux but I am unsure what would be the best practice way to do so. Will I have to detect the keys for each platform individually? Would you make use of an event listener? What's the best way to detect the input-devices?
everytime i click a mouse hes supposed to fall and lie dead but the thing is theres obviosly something missing when i run.... the picturebox8 appear out of nowhere...
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text;
I am trying to build a WinForm application that will allow you to load an image into a picturebox and then draw multiple rectangles (empty or translucent) to kind of highlight areas. I want all the rectangles to stay on the image (i can take care of a clear method later). The code below has the latest two attempts I've tried. One is all commented out and the other is not. Both will load the image just fine but neither will allow me to draw/select rectangles on the image.
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Drawing2D; using System.Linq;
