I have an ImageView object stored into a scrollPane and I need to be able to draw over that image.Please give me some sugestions.I use javaFx.
Follow the solution in: View of the application javafx for which there is some source code to Create a pannable map background in JavaFX
The solution uses a StackPane to layer content over the image, but you could draw any node you like.
Related
I have a floor plan (.svg format) and I want to load this svg with SkiaSharp, so that I could zoom-in and zoom out. (this guy's documentation was very helpful)
I will put a pin on svg (on SkiaSharp)
I created AbsoluteLayout and ImageButton and used AbsoluteLayout.SetLayoutBounds method. This worked.
But, this is actually not skiasharp's control, this is forms control. I have a coordinates on svg and I will use skiasharp svg's coordinates . How can I add a layer by layer control on skiasharp, or does skiasharp have a control for this?
I recently encountered a problem with UI. I opened a new 2D project and created a canvas with a GameObject with a Image component. I then added a sprite by right-clicking Assets > Create > Sprites > Circle. This added a circle sprite to my Assets folder.
The problem is when I choose the Source Image for the Image component as the circle, it still displays as a rectangle.
The circle sprite is imported as Sprite for Texture Type.
This problem also happens with the other shapes, such as triangle.
I am using Unity 5.6.0b9 Personal. Build target is PC, Mac, Linux Standalone.
I am probably missing something very simple. Any help is appreciated!
It doesn't work like that. Circle and all other type of Sprites under the Assets > Create > Sprites Menu are only made to work with SpriteRenderers. This would have worked if you used SpriteRenderer from GameObject--> 2D Object--> Sprite. They do not work with the UI.
For the UI, this has to be done with the Mask component. Just get any round image then use it to cut out circle from your target square image.
Create a UI Image called "TargetSquare" which is the image you want to round.
Duplicate it then name this "MaskCircle" and then resize it to make it smaller than the "TargetSquare" until that circle shape is what you want.
Make the "MaskCircle" object to be the parent of the "TargetSquare" object then use this round Sprite I made as it's source image.
Attach the Mask component to the "MaskCircle" object.
Done. Your "TargetSquare" object will have the shape of the "MaskCircle" object.
If you get jagged edges, select the sprite you used for the "MaskCircle" image and then make sure that Mipmap is disabled.
Maybe it is bug, in unity 5.6.1f1 same story.
Just try to download new version unity 5.6.2f. I dont know, that bug is fixed or not.
Or
Use some image editor, for example photoshop.
P.S. My fail, all ok, it works on SpriteRenderer component. Unity generates white square, and in this sprite properties setting Sprite Mode to Polygon and creates some shape using vertices.
I have a CombinedChart in my app (same app on both Android and iOS platforms using MPAndroidChart & iOS-Charts respectively) with stacked bars and a line but I also need to highlight specific points where a given event happened. I've got some small icon images (png) and need to place the correct image at the correct place on the graph depending on what type of event happened.
I have tried Bubble chart first and can get bubbles of the right colour at the right location but can't specify custom image instead of the bubbles' circles.
I am now trying Scatter Chart which does have a Custom shape option but it's not just a shape I need, it's a specific image. I have not worked with Core Graphics before so I'm not familiar with CGPath functions.
Is there a way to pass a UIImage to the ScatterChart customScatterShape property?
Or maybe a way to convert a UIImage created from a named png to a CGPath object which the Scatter Chart custom shape requires?
Thanks in advance for your suggestions!
As of MPAndroid version 3.0.2, you can pass in a Drawable as part of your Entry dataSet.add(new Entry(x, y, drawable)), and enable the drawIcons flag via dataSet.setDrawIcons(true).
Source code where icon gets drawn for Line charts specifically: LineChartRenderer.java
i have a scrollview which contains a pdfpage rendered with CATiledLayer, i want to draw stuff onto the pdf page so i created a overlay layer, i need the graphic to look vectorized so i decided to use CATiledlayer for the overlay layer. Only problem is that it is very slow to draw (I'm using beizerpath to draw), then i tried to optimize it by creating the overlay layer with the visible height and width when zooming in and out, so i don't need to create the overlay for the whole content bound. But still no luck , i want to try CALayer but the draw path just becomes blurry and pixelated, so i'm not sure how i can improve on this. I also tried drawinrect but for some reason it doesn't seem to work.
I suggest not using bezierpath to draw annotations since it requires you to redraw the whole path every time the pen moves. It would be better if you draw only the current line segment using CGContextAddQuadCurveToPoint.
At touchMoved, get the current point and 2 prev points
Using those points, get the area where the line should be drawn
draw at that area in drawRect using setNeedsDisplayAtRect
inside drawRect, go to the end of your path and add your new line using CGContextAddQuadCurveToPoint
If I wanted to, using Qt, simply have some circles move around in a white box, or a graphic, what would be the best method of this?
Would I need to draw white/the graphic behind where the circle moved from every time? Is there a simple way of accomplishing this in Qt?
Create QGraphicsView object to your widget and added a QGraphicsScene to view.
Add a QGraphicsEllipseItem to scene
Use QPropertyAnimation to change the "pos" property of the ellipse item.
If you need more advanced features, you can build your own animation class on QPropertyAnimation.
enjoy it:)
Update: You can read Qt's Next Generation UI for more information.
Subclass a QWidget. Start a timerEvent() to animate the positions of the circles, then call update() at the end to schedule a repaint of the widget. Override the widget's paintEvent() - in there you draw your background and circles, using a QPainter object. The Qt Assistant has examples of how to use QPainter.
Qt also has a new animation framework that may facilitate something like this, but I have not looked into it.