The ruby code below prints two windows (overlapping) via Curses. The first "border" window prints in black/cyan and the "content" window prints in blue on cyan.
The content window only displays the background color where text is printed. The rest of the content window remains black. The ruby dox describe ways to manipulate window backgrounds using either color_set, bkgd or bkgdset methods. I can only get color_set() to work however and only for text that is being printed:
How can I fill the reset of the content window with the appropriate background color? I found some code to Set a window's background color in Ruby curses but it does not seem to work and is quite old. The only other idea I have is to right-pad the string with spaces to fill the entire window with the background character but this seems reeealy hacky.
EDIT: added code
EDIT2: added "hacky padding" work around
#!/usr/bin/ruby
require 'curses'
Curses.init_screen
Curses.start_color
Curses.noecho
Curses.cbreak
Curses.refresh # Refresh the screen
xulc = 10
yulc = 10
width = 30
height = 8
# text color for border window
Curses.init_pair(1, Curses::COLOR_BLACK, Curses::COLOR_CYAN)
Curses.attrset(Curses.color_pair(1) | Curses::A_BOLD)
# Text color for content window
Curses.init_pair(2, Curses::COLOR_BLUE, Curses::COLOR_CYAN)
Curses.attrset(Curses.color_pair(2) | Curses::A_NORMAL)
# border window
win1 = Curses::Window.new(height, width, yulc, xulc)
win1.color_set(1)
win1.box("|", "-")
# content window
win2 = Curses::Window.new(height - 2, width - 2, yulc + 1, xulc + 1)
win2.color_set(2)
win2.setpos(0, 0)
# only prints in background color where there is text!
# add hacky padding to fill background then go back and print message
bg_padding = " " * ((width - 2) * (height - 2));
win2.addstr(bg_padding);
win2.setpos(0, 0)
win2.addstr("blah")
# prints without the color_set() attributes
#win2.bkgd ('.'.ord)
# make content visisble
win1.refresh
win2.refresh
# hit a key to exit curses
Curses.getch
Curses.close_screen
Ok, so I found this, the actual code is here:
It's been a while, but maybe my examples are still useful:
It is the same "diamonds" for me when using
window.bkgd(COLOR_RED) This seems to appear, because the bkgd method
takes a char and prints it to all free spaces of the window (see old
doc).
However, then you can use a color pair with the wanted background
color and apply it to all screen positions before writing oher stuff.
Here is how I solved it:
require 'curses'
init_screen
start_color
init_pair(COLOR_RED, COLOR_WHITE, COLOR_RED)
window = Curses::Window.new(0, 0, 0, 0)
window.attron(color_pair(COLOR_RED)) do
lines.times do |line|
window.setpos(line, 0)
window << ' ' * cols
end
end
Also found this:
# color_set(col)
# Sets the current color of the given window to the foreground/background
# combination described by the Fixnum col.
main_window.color_set(1)
tutorial.html#colors-initialization
Guess I'll use the hacky padding workaround. Seems to be all I've found so far
Related
I'm using the Python cmd module to create a CLI application. Everything works great! However, I'm attempting to tailor the app to a certain type of presence: text colors, title, using alpha-numeric characters as borders, etc.
Is there a standard way to create a screen overrun of sorts: the top of the screen where I have set a border and color title remain static? And from the middle of the screen, or thereabouts, down to the bottom of the screen, any text or commands entered at the prompt will stop being visible as they reach the title/border. Basically, what I'm after is for a user to always see the title/border unless they exit the CLI app. If they type help, of course, they will see the commands below the title/border. But, as they enter commands, ideally, the command menu will disappear behind the screen title/border.
Any direction on the best way I can achieve this is appreciated.
Check curses
You should be able to decorate CLI/Terminal with colors and static borders.
I have extended example taken from HERE:
import curses
from multiprocessing import Process
p = None
def display(stdscr):
stdscr.clear()
stdscr.timeout(500)
maxy, maxx = stdscr.getmaxyx()
curses.newwin(2,maxx,3,1)
# invisible cursor
curses.curs_set(0)
if (curses.has_colors()):
# Start colors in curses
curses.start_color()
curses.use_default_colors()
curses.init_pair(1, curses.COLOR_RED, -1)
stdscr.refresh()
curses.init_pair(1, 0, -1)
curses.init_pair(2, 1, -1)
curses.init_pair(3, 2, -1)
curses.init_pair(4, 3, -1)
bottomBox = curses.newwin(8,maxx-2,maxy-8,1)
bottomBox.box()
bottomBox.addstr("BottomBox")
bottomBox.refresh()
bottomwindow = curses.newwin(6,maxx-4,maxy-7,2)
bottomwindow.addstr("This is my bottom view", curses.A_UNDERLINE)
bottomwindow.refresh()
stdscr.addstr("{:20s}".format("Hello world !"), curses.color_pair(4))
stdscr.refresh()
while True:
event = stdscr.getch()
if event == ord("q"):
break
def hang():
while True:
temp = 1 + 1
if __name__ == '__main__':
p = Process(target = hang)
curses.wrapper(display)
I run python 2.7.13 on windows 7.
I am creating a window with Gtk (from pygobject 3.18.2).
I am running windows 7 with a custom shell and I am trying to make a toolbar at the bottom of the screen.
I use a grid to divide the window in a top and a bottom part.
The bottom part is always visible.
The top part must show above the bottom part on mouse enter and hide on mouse leave without moving the bottom part.
The default positioning of a window uses the top-left corner of the window, but this will cause the bottom part to shift up to the position of the top part when the top part is hidden.
I think I understand that I have to use
set_gravity(Gdk.Gravity.SOUTH_WEST)
to change this behaviour
I do not get errors, but it seems this setting is ignored. The placement of the window is not affected at all.
What am I missing?
Anything wrong in the way I call set_gravity()?
Is set_gravity the right way to achieve this?
I read Set window gravity in PyGObject?, but this question is still not answered
Here is the code I try to get working
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk
class MyWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Test")
self.set_decorated(0)
self.screen = Gdk.Screen.get_default()
self.connect("destroy", self.destroy)
self.connect("enter-notify-event", self.mouseenter)
self.connect("leave-notify-event", self.mouseleave)
self.label1 = Gtk.Label("Label1\n line1\n line2")
self.label2 = Gtk.Label("Label2")
self.label1.set_hexpand(True)
self.label2.set_hexpand(True)
self.maingrid = Gtk.Grid()
self.add(self.maingrid)
self.maingrid.attach(self.label1, 0, 0, 1, 1)
self.maingrid.attach(self.label2, 0, 1, 1, 1)
self.set_gravity(Gdk.Gravity.SOUTH_WEST) # looks like this is ignored
print self.get_gravity()
def mouseleave(self, widget, data=None):
print "mouse leave"
self.label1.hide()
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label2_height)
def mouseenter(self, widget, data=None):
print "mouse enter"
label1_height = self.label1.get_allocation().height
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label1_height + label2_height)
self.label1.show()
# Here I expect label2 to stay where it is at the bottom of the screen and label1 to be drawn above label2.
# But label2 is pushed down to make space for label1
# (normal behaviour if Gdk.Gravity.SOUTH_WEST is not set)
def destroy(self, widget, data=None):
print "destroy signal occurred"
Gtk.main_quit()
win = MyWindow()
win.show_all()
win.label1.hide()
height = win.label2.get_allocation().height
win.resize(win.screen.width(), height)
#win.move(0, win.screen.height()) # I expect this to place the window at the bottom of the screen
# if Gdk.Gravity.SOUTH_WEST is set, but it is placed offscreen
# (normal behaviour if Gdk.Gravity.SOUTH_WEST is not set)
win.move(0, win.screen.height() - 200) # shift it up 200 pixels to see what is happening
Gtk.main()
Here is a working version where I move the window to it's proper position after resizing. Moving the window makes the window flicker and it also generates the leave-notify-event and the enter-notify-event.
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk
class MyWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="Test")
self.set_decorated(0)
self.screen = Gdk.Screen.get_default()
# self.set_gravity(Gdk.Gravity.SOUTH_WEST)
self.connect("destroy", self.destroy)
self.connect("enter-notify-event", self.mouseenter)
self.connect("leave-notify-event", self.mouseleave)
self.label1 = Gtk.Label("Label1\n line1\n line2")
self.label2 = Gtk.Label("Label2")
self.label1.set_hexpand(True)
self.label2.set_hexpand(True)
self.maingrid = Gtk.Grid()
self.add(self.maingrid)
self.maingrid.attach(self.label1, 0, 0, 1, 1)
self.maingrid.attach(self.label2, 0, 1, 1, 1)
self.ismoving = 0
def mouseleave(self, widget, data=None):
print "mouse leave"
if self.ismoving:
print "window is moving"
else:
self.label1.hide()
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label2_height)
self.move(0, self.screen.height() - label2_height)
def mouseenter(self, widget, data=None):
print "mouse enter"
if self.ismoving: # moving the window generates a leave-notify-event and a enter-notify-event
self.ismoving = 0 # ignore these events when moving the window
else:
self.ismoving = 1
label1_height = self.label1.get_allocation().height
label2_height = self.label2.get_allocation().height
self.resize(self.screen.width(), label1_height + label2_height)
self.move(0, self.screen.height()-label1_height - label2_height)
self.label1.show()
def destroy(self, widget, data=None):
print "destroy signal occurred"
Gtk.main_quit()
win = MyWindow()
win.show_all()
win.label1.hide()
height = win.label2.get_allocation().height
win.resize(win.screen.width(), height)
win.move(0, win.screen.height() - height)
Gtk.main()
Based on AlexB's comment i assume my code is correct, but it is not working for me. I don't see any reason why it will not run under python 2. Maybe there is an issue with the window manager. I'll investigate
Did anyone succesfully use set_gravity() on windows?
Documentation indicates it may or may not work, depending on Window Manager. It doesn't for me on Xubuntu 18.04
I created a class that I am trying to make to simulate richtextbox, sort of, on windows forms. this means when you add new data to the form/richtextbox it is added to the bottom of the box/window and the rest is scrolled up one line.
ive tried to enable scrollok(), but it does not seem to want to scroll. i am not sure if it's bugged or my way of implementing it is wrong.
class Textpad
attr_accessor :data, :name, :window
def initialize(name, height, width, startx, starty)
#data = []
#name = name
#height = height
#width = width
#startx = startx
#starty = starty
Ncurses.refresh
#window = Ncurses.newwin(height, width, starty, startx)
#window.scrollok true
#window.wrefresh
end
def add(packetid, username, message)
#data.push [Time.new.strftime('[%T]'), packetid, username, message]
#data.shift if #data.length > 500
end
def draw
Ncurses.init_pair(1, Ncurses::COLOR_YELLOW, Ncurses::COLOR_BLACK)
Ncurses.init_pair(2, Ncurses::COLOR_CYAN, Ncurses::COLOR_BLACK)
Ncurses.init_pair(3, Ncurses::COLOR_RED, Ncurses::COLOR_BLACK)
Ncurses.init_pair(4, Ncurses::COLOR_WHITE, Ncurses::COLOR_BLACK)
#window.wclear
position = 0
#data.each do |timestamp, packetid, username, message|
case packetid
when '1005'
#window.mvwprintw(1*position, 1, "#{timestamp} «#{username}» #{message}")
#window.mvchgat(1*position, timestamp.length+2, 1, Ncurses::A_NORMAL, 3, NIL)
#window.mvchgat(1*position, timestamp.length+3+username.length, 1, Ncurses::A_NORMAL, 3, NIL) #colorize the symboles around the username
end
position += 1
end
#window.wrefresh
end
end
the problem would be inside my draw method of the Textpad class. i can fill the data array for the Textpad class with hundreds of entries but only the very top of the array gets written (until it reaches the bottom of the window) with no scrolling. Do i manually have to scroll the screen or something? from the documentation it says it should automatically scroll when the cursor reaches the bottom and another line is added.
To quote the man page:
The scrollok option controls what happens when the cursor of a window is moved off the edge of the window or scrolling region, either as a result of a newline action on the bottom line, or typing the last character of the last line. If disabled, (bf is FALSE), the cursor is left on the bottom line. If enabled, (bf is TRUE), the window is scrolled up one line...
What is happening in your code is that you are attempting to print outside the window which is an error, but an error that curses handles by not printing anything.
You can either print an new line when you get to the bottom of the window or once your reach the bottom of the window you can call #window.scroll.
Either way you will need to keep printing on the last line if you are explicitly setting the position.
var scin = new Scintilla();
ScintillaHotspotStyle = scin.Styles.LastPredefined.Index + 1;
scin.Margins[0].Width = 20;
scin.Caret.HighlightCurrentLine = true;
scin.Styles[ScintillaHotspotStyle].IsHotspot = true;
scin.Styles[ScintillaHotspotStyle].Underline = true;
scin.Styles[ScintillaHotspotStyle].ForeColor = System.Drawing.Color.Blue;
var contents = File.ReadAllText(file);
scin.Text = contents;
//scin.ConfigurationManager.Language = "cpp";
//scin.ConfigurationManager.Configure();
scin.GetRange(2, 5).SetStyle(ScintillaHotspotStyle);
//scin.ConfigurationManager.Language = "cpp";
//scin.ConfigurationManager.Configure();
It doesn't matter which order of the commented lines, nor if the call to .Configure() is performed - the outcome is the same:
If however, I do not apply the syntax highlighting, it does work:
Scintilla is pretty confusing, so I'm probably doing something wrong - but I'm not sure what...
I think that the syntax hiliting is applied after your job.
Or like if you read the scintilla documentation it seems than hotspot style have restricted feature.
"""
Caret, selection, and hotspot styles
The selection is shown by changing the foreground and/or background colours. If one of these is not set then that attribute is not changed for the selection. The default is to show the selection by changing the background to light gray and leaving the foreground the same as when it was not selected. When there is no selection, the current insertion point is marked by the text caret. This is a vertical line that is normally blinking on and off to attract the users attention.
"""
Did you try to force the style hiliting in an area which are not syntactically hilited ?
Near main or print as an example.
And try it by setting a background color.
Shoes is very handy GUI tool. I would like to do a search form so that a user is helped to navigate through larger texts for editing. For this I need to move the cursor within an editbox element.
Here you'll see my question in code:
Shoes.app do
stack do
p=para "After pressing 'search' a question will arise"
box=edit_box
box.text="One\nof\nthe\nmost\nstriking\ndifferences\nbetween\na\ncat\nand\na\nlie\nis\nthat\na\ncat\nhas\nonly\nnine lives."
flow :margin_top=>0.1 do
search=edit_line
button("search") do
pos=box.text.index search.text
y = box.text[0..pos].split.size-1 if pos
if not y.nil?
#For example if you searched "only" then
#cursor should jump/scroll to line 17.
#
#Anything there for cursor positioning,
#like: box.cursor=[0,y]
#
p.text="How can I move editbox's cursor in line #{y+1}?"
else
alert "'#{search.text}' not found"
end
end
end
end
end
Is there is any way to change cursor's position of an editbox? If not, do you know an alternative way of implementation?
Unfortunately, Shoes doesn't seem to provide any way to do that. These are the only methods defined on EditBox (it inherits from Native, which has several methods, but again, none to reposition the cursor).
rb_define_method(cEditBox, "text", CASTHOOK(shoes_edit_box_get_text), 0);
rb_define_method(cEditBox, "text=", CASTHOOK(shoes_edit_box_set_text), 1);
rb_define_method(cEditBox, "draw", CASTHOOK(shoes_edit_box_draw), 2);
rb_define_method(cEditBox, "change", CASTHOOK(shoes_control_change), -1);
http://github.com/why/shoes/blob/cea39a8bf9a5b7057b1824a9fab868d1f8609d69/shoes/ruby.c