zoom

问题 I'm working on a t-shirt designer for a client of mine and I made it using html5 canvas. The shirt designer is now finished but he requested I add a magnifying glass (something like this: http://mlens.musings.it/). I've found a lot of similar scripts out there, however, they all seem to have one thing in common they use a small and a large image. Using canvas, however, I have a different scenario and have been stumped on how I can add a magnifying glass to magnify where ever the cursor is on

问题 I have an <img> that is zoomed upon mousewheel scrolling, by adjusting transform: scale() . I want the zooming to be like in Google Maps, where you zoom to where the mouse cursor is, not to the center of the image. I'd like to not use canvas though, just for the learning experience (that's also why the other questions I found did not really help). I set up a JSFiddle to demonstrate the problem. My thought process was as follows: when zooming in by 10%, the image expands in all directions,

问题 I have an <img> that is zoomed upon mousewheel scrolling, by adjusting transform: scale() . I want the zooming to be like in Google Maps, where you zoom to where the mouse cursor is, not to the center of the image. I'd like to not use canvas though, just for the learning experience (that's also why the other questions I found did not really help). I set up a JSFiddle to demonstrate the problem. My thought process was as follows: when zooming in by 10%, the image expands in all directions,

问题 I'm using google maps in my application, and I have a webserver with a databse filled with lat/lon values. I want to mark them on the map, but I also want to cluster them together if they are within a certain pixel-distance of eachother. I figure if I retrieve all my points from the database, I should be able to do something like this (pseudocode): clusters[]; while(count(points)) { cluster[]; point = points.pop(); boundingbox = pixelsToBB(point, pixeldistance, zoomlevel); query = "select *

问题 I'm using google maps in my application, and I have a webserver with a databse filled with lat/lon values. I want to mark them on the map, but I also want to cluster them together if they are within a certain pixel-distance of eachother. I figure if I retrieve all my points from the database, I should be able to do something like this (pseudocode): clusters[]; while(count(points)) { cluster[]; point = points.pop(); boundingbox = pixelsToBB(point, pixeldistance, zoomlevel); query = "select *

问题 I tried one of sample DirectShow based virtual camera https://github.com/roman380/tmhare.mvps.org-vcam I am able to compile and build and its working fine in Google Meet. But this virtual camera is not working properly in Zoom and other Desktop apps. Its visible as video device but not showing any content like I am able to see random data in Google Meet. Zoom is using DirectShow as well as Media Foundation So Virtual camera is visible in Zoom. In zoom on selecting Virtual camera I am seeing

问题 I am having an issue with PyGame i can't resolve. So: my idea is that I have a map I can zoom in/out on. zooming in works fine. But zooming out shows that the rest of the picture got deleted and only the part of the image that was previously visible on the window exists now. This is my code: import pygame from pygame.locals import * import os class App: def __init__(self): self.running = True self.size = (800,600) #create window self.window = pygame.display.set_mode(self.size, pygame

问题 How does Zoom's website launch Zoom Meetings from Google Chrome? Can I do it using JavaScript? If so, how can I do it? Confirmation dialog box (Image) 回答1: It's not done with JavaScript, but with plain HTML. The way it works is, you create an <a> with an href attribute with a protocol other than the ones a browser usually recognizes - that is, other than http , https , etc. If the user has installed an application that recognizes the protocol, the browser will try to open that application.

问题 I have several plots to draw and save. I want to save the graph popped up in the zoomed window. What I did is as follows (which is normal save): SaveName <- c("A.pdf", "B.pdf") Path <- "~" GroupName <- c("A", "B") for (i in seq_along(Group)) { pdf(file = paste(Path, SaveName[i], sep = ""), width = 8, height = 6) plotA <- ggplot(df %>% filter(Group == GroupName[i]), aes(x, y)) + geom_point() + print(plotA) dev.off() } In this way, the files saved are the same as that by clicking "Export" ->

问题 Is there a way, like in this SO question here, to add zooming functionality to html_documents created with rmarkdown? I work in Rstudio. I have tried the following, but of course, it does not work: --- title: Zoom in on Plots author: "MS" output: html_document --- ```{r setup, include=FALSE} knitr::opts_chunk$set(echo = FALSE) ``` <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> <style> .zoomDiv { opacity: 0; position:absolute; top: 50%; left: 50%; z