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• Liskov Substitution Principle and the Oft Forgot Third Wheel

  - by Stacy Vicknair

  Liskov Substitution Principle (LSP) is a principle of object oriented programming that many might be familiar with from the SOLID principles mnemonic from Uncle Bob Martin. The principle highlights the relationship between a type and its subtypes, and, according to Wikipedia, is defined by Barbara Liskov and Jeanette Wing as the following…

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• In Excel, VBA - How can we lock resizing of a rectangle

  - by sruthi

  I have an excel sheet that contains two rectangles and text in other cells. I need to allow users to only edit the text in the rectangle. They should not be able to change the size of the object. Applying lock on the rectangle locks the object as well as the text. Does anyone know how I can achieve this?

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• Delete rectangle using c#?

  - by C. Karunarathne

  Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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• Inventory Management concepts in XNA game

  - by user1332755

  I am trying to code the inventory system in my first real game so I have very little experience in both c# and game engine development. Basically, I need some general guidance and tips with how to structure and organize these sorts of systems. Please tell me if I am on the right track or not before I get too deep into making some badly…

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• Delete rectangle using .NET?

  - by C. Karunarathne

  Can I delete the old rectangle which I have drawn and draw a new rectangle? private void panel1_MouseClick(object sender, MouseEventArgs e) { Graphics g = this.panel1.CreateGraphics(); Pen pen = new Pen(Color.Black, 2); g.DrawRectangle(pen, 100,100, 100, 200); g.dispose(); }

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• How to clip a rectangle from a tiff?

  - by TooFat

  I have a Winforms Gui in C# that allows a user to draw a rectangle on a display of a tiff and save the position, height, width etc. Basically, what I want to do is take the saved position, height and width of the rectangle and clip that area into a sep. bitmap that can then be passed to sep. method that will just OCR the new clip of…

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• WPF Rectangle filled with horizontal or vertical lines

  - by Pravin

  I am trying to create one rectangle filled with Horizontal or Vertical lines. The width of the rectangle is dynamic so I can not use an image brush. Please let me know if anybody knows any solution.

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• How to paints a transparent circle like using CGContextClearRect to draw a transparent rectangle

  - by user177946

  Hello All, Do anyone know how I can draw a transparent circle on a CALayer just like using CGContextClearRect to draw a transparent rectangle? My requirements is that I need to draw a mask on a picture, in some cases, I need to erase it, but CGContextClearRect only allow to draw a rectangle, I wonder if there is another way to do…

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• standard rectangle class

  - by Neil G

  I have a project that has a GUI (written in QT) and a command-line version. I made use of the rectangle class included in QT: QRect. I would like to break the command-line version's dependency on QT, so I need a drop-in rectangle class that supports intersection and union. I could write one, but I'd prefer including one if…

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• What is an efficient way to find a non-colliding rectangle nearest to a location

  - by hyn

  For a 2D game I am working on, I am using y axis sorting in a simple rectangle-based collision detection. This is working fine, and now I want to find the nearest empty rectangle at a given location with a given size, efficiently. How can I do this? Is there an algorithm? I could think of a simple brute force grid test (with…

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• Remove dot line rectangle surrounded hyper-link after click event

  - by Yan Cheng CHEOK

  Whenever a click event happen on a hyper-link, I will use JavaScript to toggle the display of a drop down menu. However, I realize there will be a dotted line rectangle surrounded the hyper-link still. May I know how I can explicitly remove the dotted line rectangle after the click?

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• handle 50-100 million rectangle in AutoCAD

  - by Wang

  I have huge problem when I try to get large array. For example, I have something like 10000x10000 or 5000x5000 rectangles. It is almost impossible to do anything because the screen just got frozen up. It is impossible to contain so many objects in one array. So I had 100x100 rectangle array as xref then array the xref again. …

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• How to make an ImageView to have rounded rectangle

  - by michael

  Hi, In android, ImageView is a rectangle by default. Is it possible to make it a rounded rectangle (clipped off all 4 corners of my Bitmap to be rounded rectangles) in the ImageView? If yes, can you please tell me now can I do that? Thank you.

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• draw rectangle in grid

  - by kombsh

  Please find the attached image in this posting. We have a requirement to draw a rectangle at run time on selected grid columns.The rectangle must cover all of the selected grid cells as the described in the below image.

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• Spots appear in a rectangle area on screen, ubuntu gnome 13.04, nvidia driver

  - by frozen-flame

  I am using Ubuntu Gnome 13.04 with nvidia-310 driver installed. My GPU is GeForce GTX650. Strange spots freqently appear on screen, with following traits: Spots are restricted in one or two rectangle areas at any instant. When typing, the pattern of spots change. Possibly increase, or all disappear when one key pressed.…

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• UIImage cropping on user selected rectangle in iphone?

  - by Rajendra Bhole

  Hi, I developing an small application in which i want to crop the UIImage captured by imagePickerControllerSourceTypeOfCamera. The UIImage should crop by user selected crop area or cropped rectangle. That means first user capture the image from the camera.Then on captured image the user selected an rectangle having color…

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• Scrollbar with Sprite and Rectangle won't move text, just the Rectangle it's painted on.

  - by WebDevHobo

  Warning: school assignment. For those of you still with me, I am tasked with making some scrollable content in Flash. Load in a TextFile using LoadURL(), then display it. To get the text, we've written our own class TextFieldExtended, which is basically just there to give the textfile location to the constructor and…

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• Find largest rectangle containing all zero's in an N X N binary matrix

  - by Rajendra

  Given an N X N binary matrix (containing only 0's or 1's). How can we go about finding largest rectangle containing all 0's? Example: I 0 0 0 0 1 0 0 0 1 0 0 1 II->0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 <--IV 0 0 1 0 0 0 IV is a 6 X 6 binary matrix, return value in this…

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• get the coordinates of a FrameworkElement bounding rectangle

  - by akaphenom

  How does one get the upper left coordinates of a framework elements bounding rectangle?

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• Drawing Rounded Rectangle in DirectX/3D for 2D

  - by Jengerer

  I'm using Direct3D to draw 2D elements in a C++ application of mine, and it'd be neat if I could create rounded-rectangle GUI elements that were varying in size, but I'm not sure how to do that in the most efficient manner possible. I thought of the "easy" way which would be to have images of the four corners and…

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• Activation rectangle

  - by Knowing me knowing you

  Making UML sequence diagram in VS 2010RC I've observed that there is no activation rectangle in first object. Is this correct? Not according to my tutor and I have to quote him: "Finally, you have no activation rectangle for the userInterface instance, so the initial message could never have been sent." But I'm…

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• Is there any way to display Horizontal OR Vertical lines in Rectangle

  - by Pravin

  Is there any way without using image to show horizontal or vertical lines in the Rectangle.

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• Drawing unfilled rectangle shape in c++ openGL

  - by Bahaa

  I want to draw unfilled rectangle shape in openGL using c++ programming language but when I used the glBegin(GL_QUADS) or glBegin(GL_POLYGON), the resulted shape is filled but I want to be unfilled. How I can draw unfilled rectangle. void draweRect(void) { glClear(GL_COLOR_BUFFER_BIT);…

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• Silverlight 3 - Data Binding Position of a rectangle on a canvas

  - by Blounty

  Hi Everyone, I am currently trying to bind a collection of objects to a Canvas in Silverlight 3 using an ItemsControl as below: <ItemsControl x:Name="ctrl" ItemsSource="{Binding myObjectsCollection}"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> …

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• Choosing circle radius to fully fill a rectangle

  - by Andy

  Hi, the pixman image library can draw radial color gradients between two circles. I'd like the radial gradient to fill a rectangular area defined by "width" and "height" completely. Now my question, how should I choose the radius of the outer circle? My current parameters are the…

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