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1. Darn...
2. Try changing this:
// Handle events for "life" dragging.
function handleMouseMoveSomewhere(event) { if (handleCanvasEvent()) { layerCanvas.x = currentX+(canvas1.mouseX-mouseDownX); layerCanvas.y = currentY+(canvas1.mouseY-mouseDownY); } } To this:
// Handle events for "life" dragging.
function handleMouseMoveSomewhere(event) { if (handleCanvasEvent()) { layerCanvas.x = currentX+(canvas1.mouseX-mouseDownX); layerCanvas.y = currentY+(canvas1.mouseY-mouseDownY);
updateAfterEvent();
} } 3. Darn... naw, _quality is a global switch to tell
the Flash player to render the entire contents in that quality mode; currently,
you cannot tell a specific area how to render. You can also try
"MEDIUM".
----- Original Message -----
From: [EMAIL PROTECTED]
Sent: Saturday, April 16, 2005 1:49 PM
Subject: Re: [flexcoders] Drag/Pan/Zoom HOWTO-do it
better? Thanks for tips! 1. Have tried setting vScrollPolicy to "off" with the result being less than satisfactory; despite clipContent being set to "on" if vScrollPolicy && hScrollPolicy are set to "off" the SWF loaded within the Canvas gets repainted beyond the boundaries of the Canvas. Yep... weird. 2. As to dragging, I do it more or less this way: ----------------------------------------------------------------------------------------------------- // Check whether this is an event affecting the Canvas. function handleCanvasEvent():Boolean { if (canvas1.mouseX>=0 && canvas1.mouseX<=(canvas1.width-20) && canvas1.mouseY>=0 && canvas1.mouseY<=(canvas1.height-20)) { return true; } else { return false; } } // Detect mouse down and whether this event should be handled for dragging. function handleMouseDownSomewhere(event) { if (handleCanvasEvent()) { mouseDownX = canvas1.mouseX; mouseDownY = canvas1.mouseY; currentX = layerCanvas.x; currentY = layerCanvas.y; } } // Handle events for "life" dragging. function handleMouseMoveSomewhere(event) { if (handleCanvasEvent()) { layerCanvas.x = currentX+(canvas1.mouseX-mouseDownX); layerCanvas.y = currentY+(canvas1.mouseY-mouseDownY); } } ----------------------------------------------------------------------------------------------------- I'm sure there must be more elegant ways to produce similar effects... this works with the aforementioned unsavoury side-effects. 3. Tried it... has improved performance somewhat. Can this reduction in rendering quality be applied to specific contains or always at a global level? Salutacions - Un Saludo - Regards, Carlos Lozano Diez Quavantis
I can tackle 1 one those, the rest are juts inferences: 1. not sure; try setting the v and hScrollPolicy = "off" before you drag. 2. How are you dragging it? 3. Yep! Don't know if this is Flex documented :: takes 2 millisecond look :: Weird, don't see it. Anyway, do 2 things: - set your framerate to at least 31 fps, if it's not already - try setting _quality = "LOW"; _quality should be global and the compiler shouldn't whine :: tests :: ah, cool, it works here. Ok, set it to "LOW" when you drag, and change it back to "HIGH" when your done. ----- Original Message ----- From: "carloslozanodiez" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, April 16, 2005 1:02 PM Subject: [flexcoders] Drag/Pan/Zoom HOWTO-do it better? Hi all, I've loaded a SWF map into a mx:Canvas (Flex 1.5) and need advice as to how to tackle the following problems: - When zooming/scaling the map the mx:Canvas scrollbars (always set to on) are not behaving properly (sometimes not reflecting the change in the scale of the content and sometimes disappearing altogether). Any pointers as to how I can get the mx:Canvas scrollbars to behave correctly/consistently? - When moving the map around in the mx:Canvas using the scrollbars the movement is jerky and slow. Any tips/samples on how I can improve the behavior? - When dragging the map with the mouse clicked down the movement is jerky and slow at best. Does anyone have any tips/samples as to how to optimise this type of functionality? Is there a means to reduce the rendering quality of the SWF displayed within the Canvas to low while dragging to mitigate the effects of this problem? I'm a Java coder and still getting to grips with mxml and as2 "tricks". Any tips/hints/pointers/samples much appreciated. Thanks, Carlos Lozano Quavantis Yahoo! Groups Links Yahoo! Groups Links
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