winapi - Windows 8 Getting Absolute X Y Coordinates of Touchscreen (regardless of window) -


this question has answer here:

i've scowered msdn/google past few days , i've been unable find answer question.

i'm looking x y coordinates of touch/multiple touches on touchscreen device powered windows 8. there tons of guides on how add touch handle specific window, create app relies on touch input, regardless of window/app 1 in focus/being touched.

basically, i'm looking lowest level touch api out there. got ideas? thanks!

the easy way use "legacy" (windows 7) api. this, receive touch input wm_touch message.

you use lparam of message in call gettouchinputinfo.

that returns array of touchinput structures, each of includes x , y coordinate (which, in seems may record useless/illusory precision, given precision of one-hundredth of pixel).

for new apps, microsoft recommends using pointer input api. this, you'd receive messages wm_pointerdown, wm_pointerup, , wm_pointerupdate. these, lparam of message contains single x/y point input. more complete information location, you'd call getpointerinfo retrieve coordinates of input in pointer_info structures.


Comments

Post a Comment

Popular posts from this blog

jquery - How can I dynamically add a browser tab? -

since using iframes house external pages are, accounts "not preferred method" , disallowed sites (flickr, one), want dynamically generate browser tabs. e.g., when user submits form, want dynamically generate tab on browser in response submitted. e.g., might want add new tab url like: http://www.bigsurgarrapata.com/contact how in jquery? you want form target attribute action attribute. http://www.w3schools.com/tags/att_form_target.asp browsers have ultimate control on result of target attribute open new tab value of _blank. <form action="contact_submit.php" target="_blank" method="post">
Read more

node.js - Getting the socket id,user id pair of a logged in user(s) -

i have web application done using node js , in it,i have authentication system requires users log in before can access pages. have 2 pages,the homepage , updates page. from read docs,a new socket id issued when user opens tab in browser. me being admin,i know socket id of logged in user , more so,the socket id,logged in user id pair logged in users. what method can use socket id,logged in user id pair make sure broadcast realtime info users online?.
Read more

keyboard - C++ GetAsyncKeyState alternative -

i using windows.h library's getasynckeystate function define key pushed on keyboard . here program returns int value of pushed key example. #include <iostream> #include <windows.h> using namespace std; int main (){ char i; for(i=8;i<190;i++){ if(getasynckeystate(i)== -32767){ cout<<int (i)<<endl; } } return 0; } but trying make opengl simple game , function appeared slow . there function not need cycle 180 times , if statement . thanks you're trying make opengl game, you're going use glfw. if that's case can away using glfwgetkey() such: if (glfwgetkey(glfw_key_up) == glfw_press) {...} if (glfwgetkey(glfw_key_down) == glfw_press) {...} that method nicely explained in tutorial 6 opengl-tutorial.org . should start first tutorial of beginners tutorials , later intermediate tutorials . if you're going make win32 window can listen wm_keydown or wm_keyup messages , virtua
Read more