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Everytime UIView's drawRect is called, the content drawn by previous drawRect (using Core Graphics) is cleared out. How can I make it so that the paths rendered from previous drawRect calls stay until I explicitly clear it?
Started by Boon on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
- (void)setNeedsDisplayInRect:(CGRect)invalidRect
I'm pretty certain.
This part will be re-drawn.
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I have drawn an image in the device context using python, and i want to move it somothly/animate either vertically or horizontally? What algorithm should i use?
Where can i get info for this kind of tasks in python?
Started by Gath on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
If you want to move it you need.
Once an object is drawn in a device context it stays there.
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I have a Font and a FontMetrics object in my code and I'm drawing a Font onto a Graphics object but I'm not for sure how to find out the dimensions of the font when it's drawn (in pixels). Does anyone know how I could calculate that?
Started by openidsucks on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
GetHeight() will give you the height of the text for the font size used to create the FontMetrics object, and stringWidth(String) will tell you the width of any text that you're trying to render.... .
The FontMetrics object you have should be all you need .
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Ask your Facebook Friends
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Which is the best algorithm to "Estimate and Visulize 2d skeleton using Opencv" from the drawn contour
Is the Recursive Centroid algorithm the Best? any reference links or docs please provide
Started by kumar on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
From the tracked contour, estimate and visualise 2D skeleton using Recursive Centroid algorithm or better method this exactly the task i want to say
Without doing all of your homework, here are some hints:
You have only a contour - a boundary that seperates... .
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I have several user drawn controls on a form, unfortunately when the form is shown the user drawn controls are showing the previous forms background rather than the current forms background.
The OnPaint event is very simple, and the OnBackgroundPaint ...
Answer Snippets (Read the full thread at stackoverflow):
What happens....
Since you're leaving it empty, you probably shouldn't override it in the first place .
You seem to be overriding the OnPaintBackground method not do anything about the background .
You need to set the window style - here's a nice basic article .
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I am using the ABTableViewCell subclass by Atebits to optimize scrolling for rather large potential data sources depending on what my search returns. (Either way though, I'd highly recommend the subclass for even the simplest tableviews, they scroll like...
Started by Attacus on
, 4 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Once you do simply drop a semi-transparent.
And so you would know where exactly it's drawn on screen.
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When using custom-draw (NM_CUSTOMDRAW) to draw the entire contents of a ListView SubItem (in Report/Details view), it would be nice to be able to apply the same left and right padding in my custom paint method that is applied by the control itself for...
Started by David Citron on
, 5 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
A few suggestions: If you are using ....
;-)
Can only guess without seeing your output.
I think that SM_CXEDGE and SM_CYEDGE are probably the values you want, but don't quote me on that .
I would assume that GetSystemMetrics() is that you need to look at .
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Let's say I have an encrypted file on an iPhone and every time I want to decrypt it, I want to "draw" a decryption symbol instead of having to use a keyboard to type it in.
If you request from the user to draw a symbol to decrypt a file every time it ...
Started by eagle on
, 9 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
As you note.
You, you could make each line disappear after it has been drawn or change the color to a color that you could get enough "bits" from a hand-drawn symbol to perform secure encryption.
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For my first and most awesomest Android project, I want to create a home screen widget which displays one of those Arc Clocks that all the kids are raving about these days.
Based on the limitations of RemoteViews , it looks to me that the appropriate ...
Started by MojoFilter on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
On the the canvas object....
Are you saying that the placeholder is still there when trying to draw something over it?
To create an custom component, I would extend View or any subclass of View and override the onDraw(Canvas canvas) method to do your drawing .
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I'm subclassing a WTL combobox and I'm owner-drawing the items of the combobox. The control has the attributes CBS_DROPDOWNLIST | CBS_HASSTRINGS | CBS_OWNERDRAWVARIABLE and I'm using the mix-in class COwnerDraw to implement DrawItem() and MeasureItem(...
Started by vividos on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
The DrawItem....
To draw the comboBox control (not the list), you should also handle the WM_PAINT message and do your painting there .
But where is DrawText or something like it?
Example of custom DrawItem .
On DrawItem you filling a rect with some color.
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