coordinates | 易学教程

Overlapping Circular Buttons and Hit/Tap Testing

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I am trying to create a Tabla drum app (a Table is a pair of small hand drums attached together). To do this I want to use a button for each section of the drum by putting one on top of another. Like so: I've tried using a circular image for the button but the surrounding area are a rectangle. That means when the user would hit parts of the green circle it plays the sound for the orange circle (I hope that makes sense). How can I ensure the sound for the green pad is played when the user taps in the green pad, and the sound for the orange pad is played when the user taps the orange pad? There

How to translate a given coordinate into a bounding box of “diameter” x?

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For example, I have a latitude and longitude in decimal format (as opposed to Degrees-Hours-Minutes like lat=44.1° 9.5' 30''). To search for nearby objects, I must specify the search "radius" as a rectangle with four values: north = 44.1; south = -9.9; east = -22.4; west = 55.2; Is there a formula or rule of thumb how to convert decimal lat/long values into a rectangular bounding box, such that the given latitude/longitude is in the center of that box? Must I fiddle around myself with a WGS84 ellipsoid algorithm or are there open solutions to the problem? I had exactly this problem and the

AccessibilityService: Is possible draw password on remote smartphone screen with mouse?

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问题 I'm working in a project similar to Team View QuickSupport and i want know if AccessibilityService allow perform a swipe on a remote screen that can be able to draw the password that protect device? I comes trying the following code, but without success. Until now all that happens is a exception on android code that says: java.lang.IllegalStateException: Attempting to add too many strokes to a gesture here: gestureBuilder.addStroke(new GestureDescription.StrokeDescription(path, 0, time)); The

Finding coordinates of a character?

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问题 I have a multi-line TextView . Is there a way to get the x coordinate of the pixel to the left of a character e.g. the 3rd character? In my case it will always be the 3rd character, but a general solution would be nicer. I have the y coordinate of the pixel just above the character using: Layout textViewLay = mTextView.getLayout(); int posY = textViewLay.getLineTop(0); but the x coordinate has me stumped. Any ideas? I'm probably missing something really simple. 回答1: Try to use this code: Rect

Get the current coordinates of an item on a Canvas widget given its item handle?

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问题 From reading the docs (http://effbot.org/tkinterbook/canvas.htm#reference), there doesn't appear to me to be a way to do this. Just wanted to make sure I hadn't made a mistake. (I.e. one would have to internally store the coordinates of various items in a program if one wanted to do boundary checking, for example. [e.g. Check, before moving an oval, that it will not bump into a wall, represented by a line on the current canvas, the coordinate information of which is also stored.]) 回答1: Use

Calculate X and Y position on a PNG Map from GPS Coordinate

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I'm implementing a custom maps (image with size map_width and map_height) on an iPhone app and i try to show the current user position on this map (current_long and current_lat) I have 2 references points with a known GPS coordinates (ref1_long, ref1_lat, ref2_long and ref2_lat) and known X, Y positions in pixels (ref1_x, ref1_y, ref2_x and ref2_y) My question is: how to calculate the current_x and current_y according to these informations ? You need to know the projection of the map. There are hundreds of different map projection and many of them can have the important constants that can have

Change the position of the origin in PyGame coordinate system

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I am doing some operations with vectors and physics in PyGame and the default coordinate system is inconvenient for me. Normally the (0, 0) point is at the top-left corner, but I would rather that the origin were at the bottom-left corner. I would rather change the coordinate system than converting every single thing I have to draw. Is it possible to change the coordinate system in PyGame to make it work like this? Unfortunately, pygame does not provide any such functionality. The simplest way to do it would be to have a function to convert coordinates, and use it just before drawing any

BeautifulSoup: Print div's based on content of preceding tag

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I would like to select the contents of elements based on the preceding tag: <h4>Models & Products</h4> <div class="profile-area">...</div> <h4>Production Capacity (year)</h4> <div class="profile-area">...</div> How can I get the "profile-area" values based on the content of the preceding tag? Here is my code: import requests from bs4 import BeautifulSoup import csv import re html_doc = """ <html> <body> <div class="col-md-6"> <iframe class="factory_detail_google_map" frameborder="0" src= "https://www.google.com/maps/embed/v1/search?q=3.037787%2C101.38189&key=AIzaSyCMDADp9QHYbQ8OBGl8puAOv

Address geolocation on own server

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Disclaimer: Any API is NO OPTION for me because of the vast amounts of places I want to process. I know there are plenty of services out there but I'd like to have my own solution Ok, after this is said here my question :) There are platforms like OpenStreetMap and maybe others who are doing very well in bringing the world of maps into the open source community. What I need I have an address located anywhere in the world and I want to compute the latitude and longitude, elevation would be nice but doesn't really matter. I've seen plenty of solutions offered around OpenStreetMap to generate

Figuring out distance and course between two coordinates

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问题 I have 2 coordinates and would like to do something seemingly straightforward. I want to figure out, given: 1) Coordinate A 2) Course provided by Core Location 3) Coordinate B the following: 1) Distance between A and B (can currently be done using distanceFromLocation) so ok on that one. 2) The course that should be taken to get from A to B (different from course currently traveling) Is there a simple way to accomplish this, any third party or built in API? Apple doesn't seem to provide this