alpha

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle

来源： https://stackoverflow.com/questions/15008270/get-alpha-channel-from-uiimage-rectangle

来源： https://stackoverflow.com/questions/21652732/how-to-read-the-alpha-channel-of-a-tiff-image-in-python-opencv

问题 import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.Timer; public class Main { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setLayout(new FlowLayout()); frame.setSize(new Dimension(100, 100)); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); TestPanel panel =

问题 import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.Timer; public class Main { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setLayout(new FlowLayout()); frame.setSize(new Dimension(100, 100)); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); TestPanel panel =

问题 I have a python program that has no windows frame and doesn't show up in the taskbar because of self.overrideredirect(1) . This program has an options menu (a top level widget) that allows for the alpha to be adjusted with self.attributes("-alpha", 0.85) . However when I close out of the options menu my program shows up in the task bar. Obviously I don't want it to do this. I tried invoking the self.overrideredirect(1) command after the options menu was closed, but to no avail. Does anyone

问题 Is there a way to plot transparent data points when using palette? I currently have the following code: set style fill transparent solid 0.2 noborder set palette rgb 22,13,-22 plot 'mydata.dat' u 1:2:3 ps 0.3 palette My feeling is that transparency is overwritten by the arguments of the plot command. 回答1: Is there a way to plot transparent data points when using palette? If you check help palette you will not find (or I overlooked) a statement about transparency in the palette. It looks like