To get the alpha layer of an RGBA image all you need to do is: red, green, blue, alpha = img.split() or alpha = img.split()[-1] And there is a method to set the alpha layer: img.putalpha(alpha) The transparency key is only used to define the transparency index in the palette mode (P). If you want … Read more
Question: How to make a tkinter canvas background transparent? The only possible config(… option, to set the background to nothing c.config(bg=”) results with: _tkinter.TclError: unknown color name “” To get this result: you have to hold the chess board and figures within the same .Canvas(…. self.canvas = Canvas(self, width=500, height=200, bd=0, highlightthickness=0) self.canvas.create_rectangle(245,50,345,150, fill=”white”) self.image … Read more
Clearly you are using Winforms. Yes, transparency is simulated by drawing the pixels of the Parent. Which is the form, you only see the form pixels, stacking effects don’t work. There’s a KB article that shows a workaround for this. It is painful. Another approach is to not use PictureBox controls but just draw the … Read more
I discovered how to get a transparent status bar on Samsung and Sony devices running at least Android 4.0. To start off let me explain why it isn’t possible on most devices: From the official side of Android, there is no solution until KitKat (4.4). But some device manufacturers like Samsung and Sony have added … Read more
First, remove all explicit setting of modal presentation style in code and do the following: In the storyboard set the ModalViewController’s modalPresentation style to Over Current context Check the checkboxes in the Root/Presenting ViewController – Provide Context and Define Context. They seem to be working even unchecked.
See the Android Color resource documentation for reference. Basically you have the option to set the transparency (opacity) and the color either directly in the layout or using resources references. The hex value that you set it to is composed of 3 to 4 parts: Alpha (opacity), i’ll refer to that as aa Red, i’ll … Read more
I’m not sure why you get the results you get but it should work fine when the background is transparent (i.e. you explicitly set it to Brushes.Transparent, either through XAML or code). If it is null, WPF will not include it in hit testing, and thus it won’t be eligible for mouse events. See e.g. … Read more
The problem with opacity is that it will also affect the content, when often you do not want this to happen. If you just want your element to be transparent, it’s really as easy as : background-color: transparent; But if you want it to be in colors, you can use: background-color: rgba(255, 0, 0, 0.4); … Read more
Just some simple changes that I did to get this to work. On my GLSurfaceView.Renderer: public void onSurfaceCreated(GL10 gl, EGLConfig config) { gl.glDisable(GL10.GL_DITHER); gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST); gl.glClearColor(0,0,0,0); gl.glEnable(GL10.GL_CULL_FACE); gl.glShadeModel(GL10.GL_SMOOTH); gl.glEnable(GL10.GL_DEPTH_TEST); } On my GLSurfaceView: setEGLConfigChooser(8, 8, 8, 8, 16, 0); getHolder().setFormat(PixelFormat.TRANSLUCENT);
I changed the alphademo example to draw a button instead of the red circle. This application draws the button on a 400×400 transparent window. When you click on the window the application shows/hides the title bar. #include <gtk/gtk.h> #include <gdk/gdkscreen.h> #include <cairo.h> static void screen_changed(GtkWidget *widget, GdkScreen *old_screen, gpointer user_data); static gboolean expose(GtkWidget *widget, GdkEventExpose … Read more