Re: [flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
OK, great thanks! I guess I was making it more complicated then it needed to be. > Of course, looking at y values would certainly make more sense for > vertical scrolling. :( Heh, it's ok. I have to do it in both directions, so either one is relevant. Thanks for the help! ~Aaron On Sat, Nov 1, 2008 at 6:09 PM, Tim Hoff <[EMAIL PROTECTED]> wrote: > > Of course, looking at y values would certainly make more sense for > vertical scrolling. :( > > > -TH > > --- In flexcoders@yahoogroups.com , "Tim > Hoff" <[EMAIL PROTECTED]> wrote: > > > > > > In thinking about this more, you're going to have to find the > > localToContent point x value for myCanvasChild; to see if it's in the > > viewable area of the canvas. If it is, then do something like the last > > post; replacing myCanvasChild.x with the derived x value. > > > > -TH > > > > --- In flexcoders@yahoogroups.com , "Tim > Hoff" TimHoff@ wrote: > > > > > > > > > Something along these lines: > > > > > > var hiddenArea:int = myCanvasChild.height - (myCanvas.height - > > > myCanvasChild.x); > > > > > > if (hiddenArea > 0) myCanvas.veticalScrollPosition += hiddenArea; > > > > > > -TH > > > > > > --- In flexcoders@yahoogroups.com , > "Aaron Miller" amiller@ wrote: > > > > > > > > A good suggestion, but I'm not sure if this will work for my > > purposes. > > > I do > > > > have a reference to the child object in question, but I first need > > to > > > > determine if it even needs to be scrolled. All I need to do is > > scroll > > > it > > > > enough so the child object is in view. So for instance, if there > is > > > 100px > > > > hidden, I need to scroll down 100px. How would I find the amount I > > > need to > > > > scroll by to get a child object in view? > > > > Thanks for the help! > > > > ~Aaron > > > > > > > > On Fri, Oct 31, 2008 at 10:02 AM, Tim Hoff TimHoff@ wrote: > > > > > > > > > Hi Aaron, > > > > > > > > > > If you kow the index of the canvas child that you want to scroll > > to, > > > > > something like this will work: > > > > > > > > > > myCanvas.verticalScrollPosition = > > > myCanvas.getChildAt(myChildIndex).y; > > > > > > > > > > -TH > > > > > > > > > > --- In flexcoders@yahoogroups.com , > "Aaron Miller" amiller@ > wrote: > > > > > > > > > > > > Is it to early to bump? I'm sure this is a common procedure, > I'm > > > just > > > > > kind > > > > > > of new to display level programming. How would one go about > > > pragmatically > > > > > > scrolling a Canvas until one of it's children is in view? I > know > > > how to > > > > > do > > > > > > the rest, I just don't know how to find when the child is in > > view. > > > > > > > > > > > > Thanks for your time! > > > > > > ~Aaron > > > > > > > > > > > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > > > > > > amiller@ wrote: > > > > > > > > > > > > > Hello, > > > > > > > I am trying to figure out which portion of a Canvas is in > view > > > (as in > > > > > the > > > > > > > scrolled to location), then figure out if one of it's > children > > > is in > > > > > that > > > > > > > area. In other words, I want to find out if a child object > is > > in > > > view, > > > > > and > > > > > > > if not, scroll the Canvas until it is. I was looking over > the > > > Canvas > > > > > methods > > > > > > > in the docs, but nothing jumps out at me. What's the > standard > > > practice > > > > > for > > > > > > > this? > > > > > > > > > > > > > > > > > > > > > Thanks! > > > > > > > ~Aaron > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > Aaron Miller > > > > Chief Technology Officer > > > > Open Base Interactive, LLC. > > > > amiller@ > > > > http://www.openbaseinteractive.com > > > > > > > > > > > > -- Aaron Miller Chief Technology Officer Open Base Interactive, LLC. [EMAIL PROTECTED] http://www.openbaseinteractive.com
[flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
Of course, looking at y values would certainly make more sense for vertical scrolling. :( -TH --- In flexcoders@yahoogroups.com, "Tim Hoff" <[EMAIL PROTECTED]> wrote: > > > In thinking about this more, you're going to have to find the > localToContent point x value for myCanvasChild; to see if it's in the > viewable area of the canvas. If it is, then do something like the last > post; replacing myCanvasChild.x with the derived x value. > > -TH > > --- In flexcoders@yahoogroups.com, "Tim Hoff" TimHoff@ wrote: > > > > > > Something along these lines: > > > > var hiddenArea:int = myCanvasChild.height - (myCanvas.height - > > myCanvasChild.x); > > > > if (hiddenArea > 0) myCanvas.veticalScrollPosition += hiddenArea; > > > > -TH > > > > --- In flexcoders@yahoogroups.com, "Aaron Miller" amiller@ wrote: > > > > > > A good suggestion, but I'm not sure if this will work for my > purposes. > > I do > > > have a reference to the child object in question, but I first need > to > > > determine if it even needs to be scrolled. All I need to do is > scroll > > it > > > enough so the child object is in view. So for instance, if there is > > 100px > > > hidden, I need to scroll down 100px. How would I find the amount I > > need to > > > scroll by to get a child object in view? > > > Thanks for the help! > > > ~Aaron > > > > > > On Fri, Oct 31, 2008 at 10:02 AM, Tim Hoff TimHoff@ wrote: > > > > > > > Hi Aaron, > > > > > > > > If you kow the index of the canvas child that you want to scroll > to, > > > > something like this will work: > > > > > > > > myCanvas.verticalScrollPosition = > > myCanvas.getChildAt(myChildIndex).y; > > > > > > > > -TH > > > > > > > > --- In flexcoders@yahoogroups.com, "Aaron Miller" amiller@ wrote: > > > > > > > > > > Is it to early to bump? I'm sure this is a common procedure, I'm > > just > > > > kind > > > > > of new to display level programming. How would one go about > > pragmatically > > > > > scrolling a Canvas until one of it's children is in view? I know > > how to > > > > do > > > > > the rest, I just don't know how to find when the child is in > view. > > > > > > > > > > Thanks for your time! > > > > > ~Aaron > > > > > > > > > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > > > > > amiller@ wrote: > > > > > > > > > > > Hello, > > > > > > I am trying to figure out which portion of a Canvas is in view > > (as in > > > > the > > > > > > scrolled to location), then figure out if one of it's children > > is in > > > > that > > > > > > area. In other words, I want to find out if a child object is > in > > view, > > > > and > > > > > > if not, scroll the Canvas until it is. I was looking over the > > Canvas > > > > methods > > > > > > in the docs, but nothing jumps out at me. What's the standard > > practice > > > > for > > > > > > this? > > > > > > > > > > > > > > > > > > Thanks! > > > > > > ~Aaron > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > Aaron Miller > > > Chief Technology Officer > > > Open Base Interactive, LLC. > > > amiller@ > > > http://www.openbaseinteractive.com > > > > > >
[flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
In thinking about this more, you're going to have to find the localToContent point x value for myCanvasChild; to see if it's in the viewable area of the canvas. If it is, then do something like the last post; replacing myCanvasChild.x with the derived x value. -TH --- In flexcoders@yahoogroups.com, "Tim Hoff" <[EMAIL PROTECTED]> wrote: > > > Something along these lines: > > var hiddenArea:int = myCanvasChild.height - (myCanvas.height - > myCanvasChild.x); > > if (hiddenArea > 0) myCanvas.veticalScrollPosition += hiddenArea; > > -TH > > --- In flexcoders@yahoogroups.com, "Aaron Miller" amiller@ wrote: > > > > A good suggestion, but I'm not sure if this will work for my purposes. > I do > > have a reference to the child object in question, but I first need to > > determine if it even needs to be scrolled. All I need to do is scroll > it > > enough so the child object is in view. So for instance, if there is > 100px > > hidden, I need to scroll down 100px. How would I find the amount I > need to > > scroll by to get a child object in view? > > Thanks for the help! > > ~Aaron > > > > On Fri, Oct 31, 2008 at 10:02 AM, Tim Hoff TimHoff@ wrote: > > > > > Hi Aaron, > > > > > > If you kow the index of the canvas child that you want to scroll to, > > > something like this will work: > > > > > > myCanvas.verticalScrollPosition = > myCanvas.getChildAt(myChildIndex).y; > > > > > > -TH > > > > > > --- In flexcoders@yahoogroups.com, "Aaron Miller" amiller@ wrote: > > > > > > > > Is it to early to bump? I'm sure this is a common procedure, I'm > just > > > kind > > > > of new to display level programming. How would one go about > pragmatically > > > > scrolling a Canvas until one of it's children is in view? I know > how to > > > do > > > > the rest, I just don't know how to find when the child is in view. > > > > > > > > Thanks for your time! > > > > ~Aaron > > > > > > > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > > > > amiller@ wrote: > > > > > > > > > Hello, > > > > > I am trying to figure out which portion of a Canvas is in view > (as in > > > the > > > > > scrolled to location), then figure out if one of it's children > is in > > > that > > > > > area. In other words, I want to find out if a child object is in > view, > > > and > > > > > if not, scroll the Canvas until it is. I was looking over the > Canvas > > > methods > > > > > in the docs, but nothing jumps out at me. What's the standard > practice > > > for > > > > > this? > > > > > > > > > > > > > > > Thanks! > > > > > ~Aaron > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > Aaron Miller > > Chief Technology Officer > > Open Base Interactive, LLC. > > amiller@ > > http://www.openbaseinteractive.com > > >
[flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
Something along these lines: var hiddenArea:int = myCanvasChild.height - (myCanvas.height - myCanvasChild.x); if (hiddenArea > 0) myCanvas.veticalScrollPosition += hiddenArea; -TH --- In flexcoders@yahoogroups.com, "Aaron Miller" <[EMAIL PROTECTED]> wrote: > > A good suggestion, but I'm not sure if this will work for my purposes. I do > have a reference to the child object in question, but I first need to > determine if it even needs to be scrolled. All I need to do is scroll it > enough so the child object is in view. So for instance, if there is 100px > hidden, I need to scroll down 100px. How would I find the amount I need to > scroll by to get a child object in view? > Thanks for the help! > ~Aaron > > On Fri, Oct 31, 2008 at 10:02 AM, Tim Hoff [EMAIL PROTECTED] wrote: > > > Hi Aaron, > > > > If you kow the index of the canvas child that you want to scroll to, > > something like this will work: > > > > myCanvas.verticalScrollPosition = myCanvas.getChildAt(myChildIndex).y; > > > > -TH > > > > --- In flexcoders@yahoogroups.com, "Aaron Miller" amiller@ wrote: > > > > > > Is it to early to bump? I'm sure this is a common procedure, I'm just > > kind > > > of new to display level programming. How would one go about pragmatically > > > scrolling a Canvas until one of it's children is in view? I know how to > > do > > > the rest, I just don't know how to find when the child is in view. > > > > > > Thanks for your time! > > > ~Aaron > > > > > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > > > amiller@ wrote: > > > > > > > Hello, > > > > I am trying to figure out which portion of a Canvas is in view (as in > > the > > > > scrolled to location), then figure out if one of it's children is in > > that > > > > area. In other words, I want to find out if a child object is in view, > > and > > > > if not, scroll the Canvas until it is. I was looking over the Canvas > > methods > > > > in the docs, but nothing jumps out at me. What's the standard practice > > for > > > > this? > > > > > > > > > > > > Thanks! > > > > ~Aaron > > > > > > > > > > > > > > > > > -- > Aaron Miller > Chief Technology Officer > Open Base Interactive, LLC. > [EMAIL PROTECTED] > http://www.openbaseinteractive.com >
Re: [flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
A good suggestion, but I'm not sure if this will work for my purposes. I do have a reference to the child object in question, but I first need to determine if it even needs to be scrolled. All I need to do is scroll it enough so the child object is in view. So for instance, if there is 100px hidden, I need to scroll down 100px. How would I find the amount I need to scroll by to get a child object in view? Thanks for the help! ~Aaron On Fri, Oct 31, 2008 at 10:02 AM, Tim Hoff <[EMAIL PROTECTED]> wrote: > Hi Aaron, > > If you kow the index of the canvas child that you want to scroll to, > something like this will work: > > myCanvas.verticalScrollPosition = myCanvas.getChildAt(myChildIndex).y; > > -TH > > --- In flexcoders@yahoogroups.com, "Aaron Miller" <[EMAIL PROTECTED]> wrote: > > > > Is it to early to bump? I'm sure this is a common procedure, I'm just > kind > > of new to display level programming. How would one go about pragmatically > > scrolling a Canvas until one of it's children is in view? I know how to > do > > the rest, I just don't know how to find when the child is in view. > > > > Thanks for your time! > > ~Aaron > > > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > > [EMAIL PROTECTED] wrote: > > > > > Hello, > > > I am trying to figure out which portion of a Canvas is in view (as in > the > > > scrolled to location), then figure out if one of it's children is in > that > > > area. In other words, I want to find out if a child object is in view, > and > > > if not, scroll the Canvas until it is. I was looking over the Canvas > methods > > > in the docs, but nothing jumps out at me. What's the standard practice > for > > > this? > > > > > > > > > Thanks! > > > ~Aaron > > > > > > > > -- Aaron Miller Chief Technology Officer Open Base Interactive, LLC. [EMAIL PROTECTED] http://www.openbaseinteractive.com
[flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
Hi Aaron, If you kow the index of the canvas child that you want to scroll to, something like this will work: myCanvas.verticalScrollPosition = myCanvas.getChildAt(myChildIndex).y; -TH --- In flexcoders@yahoogroups.com, "Aaron Miller" <[EMAIL PROTECTED]> wrote: > > Is it to early to bump? I'm sure this is a common procedure, I'm just kind > of new to display level programming. How would one go about pragmatically > scrolling a Canvas until one of it's children is in view? I know how to do > the rest, I just don't know how to find when the child is in view. > > Thanks for your time! > ~Aaron > > On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < > [EMAIL PROTECTED] wrote: > > > Hello, > > I am trying to figure out which portion of a Canvas is in view (as in the > > scrolled to location), then figure out if one of it's children is in that > > area. In other words, I want to find out if a child object is in view, and > > if not, scroll the Canvas until it is. I was looking over the Canvas methods > > in the docs, but nothing jumps out at me. What's the standard practice for > > this? > > > > > > Thanks! > > ~Aaron > > >
[flexcoders] Re: finding out if a child is in view with the current scroll location of a Canvas
Is it to early to bump? I'm sure this is a common procedure, I'm just kind of new to display level programming. How would one go about pragmatically scrolling a Canvas until one of it's children is in view? I know how to do the rest, I just don't know how to find when the child is in view. Thanks for your time! ~Aaron On Wed, Oct 29, 2008 at 7:14 PM, Aaron Miller < [EMAIL PROTECTED]> wrote: > Hello, > I am trying to figure out which portion of a Canvas is in view (as in the > scrolled to location), then figure out if one of it's children is in that > area. In other words, I want to find out if a child object is in view, and > if not, scroll the Canvas until it is. I was looking over the Canvas methods > in the docs, but nothing jumps out at me. What's the standard practice for > this? > > > Thanks! > ~Aaron >
