I have a Map that fills the window and some locations from which I generate a georectangle. I want to set the visibleRegion of the Map to the georectangle but I also want a margin (in pixels) a the bottom of the window for overlays, so that the locations are never hidden behind the overlays. How can I do this?
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I'am using reactJS and want to design a component with following functionality :
Display pixelated image which is able to zoom in and zoom out at pixel level.
When clicked on image , display a marker- which can be a dot or icon at specific position.
When image is zoomIn/zoomOut, marker size and position should not change.
Even after zoomIn/zoomOut when clicked on image, marker should get repositioned at proper pixel on the image.
I am thinking of applying same logic as used in the maps/ leaflet. Like they maintain separate layers for map and markers on the map. If we zoomIn/out maps it won't affect the marker position or size, same functionality I want for the image.
Anyone with the solution or related library will be welcomed !
(For reference, I want this design for marking GCP(Ground Control Points) on the image, which requires very precise marking at pixel level)
I want to zooming/scaling swf content of particular values like x,y,width,height.That selected coordinates/selected are will be visible to the container.
I am using SwfLoader to load swf content and i want zoom.
I think it is not possible to zoom perticular area of swfloader, you can use scaleX, scaleY property to zoom your swfloader by certain percent, but if you want to zoom a perticular area then you have to scale whole swf and arrange swf's horizontal and vertical scroll position so that selected area would be come in the center of the screen. it looks like zooming the selected area but it actually zoom whole swf....
Hi i'm trying to get a photoshop-like behaviour for my QGraphicsScene
The grid in the background should not resize with the call of scale. And I must be able to save the picture with QPixmap::grabWidget(view) but without the background grid. I can probably do it with removing the background layer just before saving the picture, but i'm not sure if its cleanest way to do it.
Any ideas ?
thx.
Question 1
The grid in the background should not resize with the call of scale.
Use the QGraphicsItem::ItemIgnoresTransformations flag.
The item ignores inherited transformations (i.e., its position is
still anchored to its parent, but the parent or view rotation, zoom or
shear transformations are ignored). This flag is useful for keeping
text label items horizontal and unscaled, so they will still be
readable if the view is transformed. When set, the item's view
geometry and scene geometry will be maintained separately.
In order to set this flag use the setFlag function when creating the grid item.
Question 2
I must be able to save the picture with QPixmap::grabWidget(view) but without the
background grid.
Call the hide function on the grid item before calling the grabWidget. After you have grabbed it you show it again by calling the show function.
Please help me to change size of openInfoWindowHtml in google map and plez tell me can i make it popup out of map area also..? i mean my map area is very small but i want that when user click on Marker this openInfoWindowHtml should show popup and if its crossing size of map than its should show beyond the boundary of google map. ( i am working in asp.net)
There are 2 ways that you can influence the size of the InfoWindow. First, you can pass a GInfoWindowOptions object when you call openInfoWindowHtml (see: http://code.google.com/apis/maps/documentation/reference.html#GInfoWindowOptions) Second, you can wrap the contents of the InfoWindow in a div and use CSS to set the size of that div.
Regardless of which method you use to set the size of the InfoWindow, it can never exceed the bounds of the map canvas (area).
I am using bitmapData and bitmap classes to render a mouse cursor on the display screen. The bitmapData consists of an area whose colors should be inverted according to the background color. This is a very basic thing which could be observed with text cursor(the vertical line with two small horizontals on top and bottom), when moved over the text area.
I want to be able to do the same with the pixels in my bitmapData, is there a way to find out the background color effectively and invert the color values?
In this process i will be redrawing the whole pixels, is there any other efficient way to do that ?
You can draw your cursor using BlendMode.INVERT
http://livedocs.adobe.com/flex/3/langref/flash/display/BitmapData.html#draw()
or simply put your cursor display object over your bitmap and set it's blendMode to INVERT.