Building A Color Picker in PyGame using Hooman

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In this tutorial we’ll be building a color picker in PyGame using the Hooman library:

Introducing Hooman

Hooman is a library which simplifies PyGame coding.

To install it’s just: 

pip install Hooman
pip install Hooman
pip install Hooman

The Hooman skeleton is as follows: 

<span>from</span> <span>hooman</span> <span>import</span> <span>Hooman</span>
<span>import</span> <span>pygame</span>
<span>window_width</span><span>,</span> <span>window_height</span> <span>=</span> <span>500</span><span>,</span> <span>500</span>
<span>hapi</span> <span>=</span> <span>Hooman</span><span>(</span><span>window_width</span><span>,</span> <span>window_height</span><span>)</span>
<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>
    <span>hapi</span><span>.</span><span>flip_display</span><span>()</span>
    <span>hapi</span><span>.</span><span>event_loop</span><span>()</span>
<span>pygame</span><span>.</span><span>quit</span><span>()</span>
<span>from</span> <span>hooman</span> <span>import</span> <span>Hooman</span>
<span>import</span> <span>pygame</span>

<span>window_width</span><span>,</span> <span>window_height</span> <span>=</span> <span>500</span><span>,</span> <span>500</span>
<span>hapi</span> <span>=</span> <span>Hooman</span><span>(</span><span>window_width</span><span>,</span> <span>window_height</span><span>)</span>


<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>

    <span>hapi</span><span>.</span><span>flip_display</span><span>()</span>
    <span>hapi</span><span>.</span><span>event_loop</span><span>()</span>

<span>pygame</span><span>.</span><span>quit</span><span>()</span>
from hooman import Hooman
import pygame

window_width, window_height = 500, 500
hapi = Hooman(window_width, window_height)


while hapi.is_running:

    hapi.flip_display()
    hapi.event_loop()

pygame.quit()

Building the picker

We need two Hooman elements:

The Slider and the text element.

The slider is as follows:

hapi.slider(x, y, width, height, options)

where options is a dictionary

The docs tell us: 

optional parameters
background_color - the background color of the slider
slider_width - the width of slider, by default it is the same as the height
slider_color - the color of the slider
starting_value - the starting value of the slider, by default it is in the middle of the range
value_range - the range that the slider ranges between, by default it is between 0 and 1
Methods
update() - this updates the slider and draws it on screen, this should be called every frame
value() - this returns the current value of the slider
set_value(value) - given a integer or float, this sets the value and moves the slider
optional parameters

background_color - the background color of the slider
slider_width - the width of slider, by default it is the same as the height
slider_color - the color of the slider
starting_value - the starting value of the slider, by default it is in the middle of the range
value_range - the range that the slider ranges between, by default it is between 0 and 1

Methods

update() - this updates the slider and draws it on screen, this should be called every frame
value() - this returns the current value of the slider
set_value(value) - given a integer or float, this sets the value and moves the slider
optional parameters

background_color - the background color of the slider
slider_width - the width of slider, by default it is the same as the height
slider_color - the color of the slider
starting_value - the starting value of the slider, by default it is in the middle of the range
value_range - the range that the slider ranges between, by default it is between 0 and 1

Methods

update() - this updates the slider and draws it on screen, this should be called every frame
value() - this returns the current value of the slider
set_value(value) - given a integer or float, this sets the value and moves the slider

Before the while loop we set 3 sliders: 

<span>slider_options</span> <span>=</span> <span>{</span><span>"value_range"</span><span>:</span> <span>[</span><span>0</span><span>,</span> <span>255</span><span>]}</span>
<span>r_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>300</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>g_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>330</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>b_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>360</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>slider_options</span> <span>=</span> <span>{</span><span>"value_range"</span><span>:</span> <span>[</span><span>0</span><span>,</span> <span>255</span><span>]}</span>

<span>r_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>300</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>g_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>330</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>b_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>360</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
slider_options = {"value_range": [0, 255]}

r_slider = hapi.slider(50, 300, 400, 10, slider_options)
g_slider = hapi.slider(50, 330, 400, 10, slider_options)
b_slider = hapi.slider(50, 360, 400, 10, slider_options)

where each has a range of 0 to 255

Then we set the background to the slider values. Before the background docs tell: 

.background
used to set background color of screen
hapi.background((100, 100, 100)) for r g b
hapi.background(100) same as hapi.background((100, 100, 100))
.background

used to set background color of screen
hapi.background((100, 100, 100)) for r g b
hapi.background(100) same as hapi.background((100, 100, 100))
.background

used to set background color of screen
hapi.background((100, 100, 100)) for r g b
hapi.background(100) same as hapi.background((100, 100, 100))

The below snippet suits our purpose: 

<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>
    <span>bg_col</span> <span>=</span> <span>(</span><span>r_slider</span><span>.</span><span>value</span><span>(),</span> <span>g_slider</span><span>.</span><span>value</span><span>(),</span> <span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>background</span><span>(</span><span>bg_col</span><span>)</span>
<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>
    <span>bg_col</span> <span>=</span> <span>(</span><span>r_slider</span><span>.</span><span>value</span><span>(),</span> <span>g_slider</span><span>.</span><span>value</span><span>(),</span> <span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>background</span><span>(</span><span>bg_col</span><span>)</span>
while hapi.is_running:
    bg_col = (r_slider.value(), g_slider.value(), b_slider.value())
    hapi.background(bg_col)

colors are set as tuples of 3 values viz red, blue, green

Then after we update the sliders: 

    <span>r_slider</span><span>.</span><span>update</span><span>()</span>
    <span>g_slider</span><span>.</span><span>update</span><span>()</span>
    <span>b_slider</span><span>.</span><span>update</span><span>()</span>
    <span>r_slider</span><span>.</span><span>update</span><span>()</span>
    <span>g_slider</span><span>.</span><span>update</span><span>()</span>
    <span>b_slider</span><span>.</span><span>update</span><span>()</span>
    r_slider.update()
    g_slider.update()
    b_slider.update()

Then we display the values using .text

.text(the string, x, y) 

    <span>hapi</span><span>.</span><span>fill</span><span>(</span><span>hapi</span><span>.</span><span>color</span><span>[</span><span>"black"</span><span>])</span>
    <span>r_text</span> <span>=</span> <span>"r:{}"</span><span>.</span><span>format</span><span>(</span><span>r_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>r_text</span><span>,</span> <span>50</span><span>,</span> <span>280</span><span>)</span>
    <span>g_text</span> <span>=</span> <span>"g:{}"</span><span>.</span><span>format</span><span>(</span><span>g_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>g_text</span><span>,</span> <span>50</span><span>,</span> <span>310</span><span>)</span>
    <span>b_text</span> <span>=</span> <span>"b:{}"</span><span>.</span><span>format</span><span>(</span><span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>b_text</span><span>,</span> <span>50</span><span>,</span> <span>340</span><span>)</span>
    <span>hapi</span><span>.</span><span>fill</span><span>(</span><span>hapi</span><span>.</span><span>color</span><span>[</span><span>"black"</span><span>])</span>
    <span>r_text</span> <span>=</span> <span>"r:{}"</span><span>.</span><span>format</span><span>(</span><span>r_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>r_text</span><span>,</span> <span>50</span><span>,</span> <span>280</span><span>)</span>
    <span>g_text</span> <span>=</span> <span>"g:{}"</span><span>.</span><span>format</span><span>(</span><span>g_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>g_text</span><span>,</span> <span>50</span><span>,</span> <span>310</span><span>)</span>
    <span>b_text</span> <span>=</span> <span>"b:{}"</span><span>.</span><span>format</span><span>(</span><span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>b_text</span><span>,</span> <span>50</span><span>,</span> <span>340</span><span>)</span>
    hapi.fill(hapi.color["black"])
    r_text = "r:{}".format(r_slider.value())
    hapi.text(r_text, 50, 280)
    g_text = "g:{}".format(g_slider.value())
    hapi.text(g_text, 50, 310)
    b_text = "b:{}".format(b_slider.value())
    hapi.text(b_text, 50, 340)

The complete snippet: 

<span>from</span> <span>hooman</span> <span>import</span> <span>Hooman</span>
<span>import</span> <span>pygame</span>
<span>window_width</span><span>,</span> <span>window_height</span> <span>=</span> <span>500</span><span>,</span> <span>500</span>
<span>hapi</span> <span>=</span> <span>Hooman</span><span>(</span><span>window_width</span><span>,</span> <span>window_height</span><span>)</span>
<span>slider_options</span> <span>=</span> <span>{</span><span>"value_range"</span><span>:</span> <span>[</span><span>0</span><span>,</span> <span>255</span><span>]}</span>
<span>r_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>300</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>g_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>330</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>b_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>360</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>
    <span>bg_col</span> <span>=</span> <span>(</span><span>r_slider</span><span>.</span><span>value</span><span>(),</span> <span>g_slider</span><span>.</span><span>value</span><span>(),</span> <span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>background</span><span>(</span><span>bg_col</span><span>)</span>
    <span>r_slider</span><span>.</span><span>update</span><span>()</span>
    <span>g_slider</span><span>.</span><span>update</span><span>()</span>
    <span>b_slider</span><span>.</span><span>update</span><span>()</span>
    <span>hapi</span><span>.</span><span>fill</span><span>(</span><span>hapi</span><span>.</span><span>color</span><span>[</span><span>"black"</span><span>])</span>
    <span>r_text</span> <span>=</span> <span>"r:{}"</span><span>.</span><span>format</span><span>(</span><span>r_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>r_text</span><span>,</span> <span>50</span><span>,</span> <span>280</span><span>)</span>
    <span>g_text</span> <span>=</span> <span>"g:{}"</span><span>.</span><span>format</span><span>(</span><span>g_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>g_text</span><span>,</span> <span>50</span><span>,</span> <span>310</span><span>)</span>
    <span>b_text</span> <span>=</span> <span>"b:{}"</span><span>.</span><span>format</span><span>(</span><span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>b_text</span><span>,</span> <span>50</span><span>,</span> <span>340</span><span>)</span>
    <span>hapi</span><span>.</span><span>flip_display</span><span>()</span>
    <span>hapi</span><span>.</span><span>event_loop</span><span>()</span>
<span>pygame</span><span>.</span><span>quit</span><span>()</span>
<span>from</span> <span>hooman</span> <span>import</span> <span>Hooman</span>
<span>import</span> <span>pygame</span>

<span>window_width</span><span>,</span> <span>window_height</span> <span>=</span> <span>500</span><span>,</span> <span>500</span>
<span>hapi</span> <span>=</span> <span>Hooman</span><span>(</span><span>window_width</span><span>,</span> <span>window_height</span><span>)</span>


<span>slider_options</span> <span>=</span> <span>{</span><span>"value_range"</span><span>:</span> <span>[</span><span>0</span><span>,</span> <span>255</span><span>]}</span>

<span>r_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>300</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>g_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>330</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>
<span>b_slider</span> <span>=</span> <span>hapi</span><span>.</span><span>slider</span><span>(</span><span>50</span><span>,</span> <span>360</span><span>,</span> <span>400</span><span>,</span> <span>10</span><span>,</span> <span>slider_options</span><span>)</span>

<span>while</span> <span>hapi</span><span>.</span><span>is_running</span><span>:</span>
    <span>bg_col</span> <span>=</span> <span>(</span><span>r_slider</span><span>.</span><span>value</span><span>(),</span> <span>g_slider</span><span>.</span><span>value</span><span>(),</span> <span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>background</span><span>(</span><span>bg_col</span><span>)</span>

    <span>r_slider</span><span>.</span><span>update</span><span>()</span>
    <span>g_slider</span><span>.</span><span>update</span><span>()</span>
    <span>b_slider</span><span>.</span><span>update</span><span>()</span>

    <span>hapi</span><span>.</span><span>fill</span><span>(</span><span>hapi</span><span>.</span><span>color</span><span>[</span><span>"black"</span><span>])</span>
    <span>r_text</span> <span>=</span> <span>"r:{}"</span><span>.</span><span>format</span><span>(</span><span>r_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>r_text</span><span>,</span> <span>50</span><span>,</span> <span>280</span><span>)</span>
    <span>g_text</span> <span>=</span> <span>"g:{}"</span><span>.</span><span>format</span><span>(</span><span>g_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>g_text</span><span>,</span> <span>50</span><span>,</span> <span>310</span><span>)</span>
    <span>b_text</span> <span>=</span> <span>"b:{}"</span><span>.</span><span>format</span><span>(</span><span>b_slider</span><span>.</span><span>value</span><span>())</span>
    <span>hapi</span><span>.</span><span>text</span><span>(</span><span>b_text</span><span>,</span> <span>50</span><span>,</span> <span>340</span><span>)</span>

    <span>hapi</span><span>.</span><span>flip_display</span><span>()</span>
    <span>hapi</span><span>.</span><span>event_loop</span><span>()</span>

<span>pygame</span><span>.</span><span>quit</span><span>()</span>
from hooman import Hooman
import pygame

window_width, window_height = 500, 500
hapi = Hooman(window_width, window_height)


slider_options = {"value_range": [0, 255]}

r_slider = hapi.slider(50, 300, 400, 10, slider_options)
g_slider = hapi.slider(50, 330, 400, 10, slider_options)
b_slider = hapi.slider(50, 360, 400, 10, slider_options)

while hapi.is_running:
    bg_col = (r_slider.value(), g_slider.value(), b_slider.value())
    hapi.background(bg_col)

    r_slider.update()
    g_slider.update()
    b_slider.update()

    hapi.fill(hapi.color["black"])
    r_text = "r:{}".format(r_slider.value())
    hapi.text(r_text, 50, 280)
    g_text = "g:{}".format(g_slider.value())
    hapi.text(g_text, 50, 310)
    b_text = "b:{}".format(b_slider.value())
    hapi.text(b_text, 50, 340)

    hapi.flip_display()
    hapi.event_loop()

pygame.quit()

原文链接：Building A Color Picker in PyGame using Hooman

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