(R.id.misc_example_5)
77 | misc5.setDashColorGenerator(
78 | object : DashColorGenerator {
79 | override fun getPaintColor(curIndex: Int, numDashes: Int): Int {
80 | return when {
81 | curIndex % 5 == 0 -> ContextCompat.getColor(
82 | this@MainActivity.applicationContext,
83 | R.color.rainbow1
84 | )
85 | curIndex % 5 == 1 -> ContextCompat.getColor(
86 | this@MainActivity.applicationContext,
87 | R.color.rainbow2
88 | )
89 | curIndex % 5 == 2 -> ContextCompat.getColor(
90 | this@MainActivity.applicationContext,
91 | R.color.rainbow3
92 | )
93 | curIndex % 5 == 3 -> ContextCompat.getColor(
94 | this@MainActivity.applicationContext,
95 | R.color.rainbow4
96 | )
97 | else -> ContextCompat.getColor(
98 | this@MainActivity.applicationContext,
99 | R.color.rainbow5
100 | )
101 | }
102 | }
103 | }
104 | )
105 | }
106 | }
--------------------------------------------------------------------------------
/CODE_OF_CONDUCT.md:
--------------------------------------------------------------------------------
1 | # Contributor Covenant Code of Conduct
2 |
3 | ## Our Pledge
4 |
5 | We as members, contributors, and leaders pledge to make participation in our
6 | community a harassment-free experience for everyone, regardless of age, body
7 | size, visible or invisible disability, ethnicity, sex characteristics, gender
8 | identity and expression, level of experience, education, socio-economic status,
9 | nationality, personal appearance, race, religion, or sexual identity
10 | and orientation.
11 |
12 | We pledge to act and interact in ways that contribute to an open, welcoming,
13 | diverse, inclusive, and healthy community.
14 |
15 | ## Our Standards
16 |
17 | Examples of behavior that contributes to a positive environment for our
18 | community include:
19 |
20 | * Demonstrating empathy and kindness toward other people
21 | * Being respectful of differing opinions, viewpoints, and experiences
22 | * Giving and gracefully accepting constructive feedback
23 | * Accepting responsibility and apologizing to those affected by our mistakes,
24 | and learning from the experience
25 | * Focusing on what is best not just for us as individuals, but for the
26 | overall community
27 |
28 | Examples of unacceptable behavior include:
29 |
30 | * The use of sexualized language or imagery, and sexual attention or
31 | advances of any kind
32 | * Trolling, insulting or derogatory comments, and personal or political attacks
33 | * Public or private harassment
34 | * Publishing others' private information, such as a physical or email
35 | address, without their explicit permission
36 | * Other conduct which could reasonably be considered inappropriate in a
37 | professional setting
38 |
39 | ## Enforcement Responsibilities
40 |
41 | Community leaders are responsible for clarifying and enforcing our standards of
42 | acceptable behavior and will take appropriate and fair corrective action in
43 | response to any behavior that they deem inappropriate, threatening, offensive,
44 | or harmful.
45 |
46 | Community leaders have the right and responsibility to remove, edit, or reject
47 | comments, commits, code, wiki edits, issues, and other contributions that are
48 | not aligned to this Code of Conduct, and will communicate reasons for moderation
49 | decisions when appropriate.
50 |
51 | ## Scope
52 |
53 | This Code of Conduct applies within all community spaces, and also applies when
54 | an individual is officially representing the community in public spaces.
55 | Examples of representing our community include using an official e-mail address,
56 | posting via an official social media account, or acting as an appointed
57 | representative at an online or offline event.
58 |
59 | ## Enforcement
60 |
61 | Instances of abusive, harassing, or otherwise unacceptable behavior may be
62 | reported to the community leaders responsible for enforcement at
63 | contact.mhartley@gmail.com.
64 | All complaints will be reviewed and investigated promptly and fairly.
65 |
66 | All community leaders are obligated to respect the privacy and security of the
67 | reporter of any incident.
68 |
69 | ## Enforcement Guidelines
70 |
71 | Community leaders will follow these Community Impact Guidelines in determining
72 | the consequences for any action they deem in violation of this Code of Conduct:
73 |
74 | ### 1. Correction
75 |
76 | **Community Impact**: Use of inappropriate language or other behavior deemed
77 | unprofessional or unwelcome in the community.
78 |
79 | **Consequence**: A private, written warning from community leaders, providing
80 | clarity around the nature of the violation and an explanation of why the
81 | behavior was inappropriate. A public apology may be requested.
82 |
83 | ### 2. Warning
84 |
85 | **Community Impact**: A violation through a single incident or series
86 | of actions.
87 |
88 | **Consequence**: A warning with consequences for continued behavior. No
89 | interaction with the people involved, including unsolicited interaction with
90 | those enforcing the Code of Conduct, for a specified period of time. This
91 | includes avoiding interactions in community spaces as well as external channels
92 | like social media. Violating these terms may lead to a temporary or
93 | permanent ban.
94 |
95 | ### 3. Temporary Ban
96 |
97 | **Community Impact**: A serious violation of community standards, including
98 | sustained inappropriate behavior.
99 |
100 | **Consequence**: A temporary ban from any sort of interaction or public
101 | communication with the community for a specified period of time. No public or
102 | private interaction with the people involved, including unsolicited interaction
103 | with those enforcing the Code of Conduct, is allowed during this period.
104 | Violating these terms may lead to a permanent ban.
105 |
106 | ### 4. Permanent Ban
107 |
108 | **Community Impact**: Demonstrating a pattern of violation of community
109 | standards, including sustained inappropriate behavior, harassment of an
110 | individual, or aggression toward or disparagement of classes of individuals.
111 |
112 | **Consequence**: A permanent ban from any sort of public interaction within
113 | the community.
114 |
115 | ## Attribution
116 |
117 | This Code of Conduct is adapted from the [Contributor Covenant][homepage],
118 | version 2.0, available at
119 | https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
120 |
121 | Community Impact Guidelines were inspired by [Mozilla's code of conduct
122 | enforcement ladder](https://github.com/mozilla/diversity).
123 |
124 | [homepage]: https://www.contributor-covenant.org
125 |
126 | For answers to common questions about this code of conduct, see the FAQ at
127 | https://www.contributor-covenant.org/faq. Translations are available at
128 | https://www.contributor-covenant.org/translations.
129 |
--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env sh
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Attempt to set APP_HOME
10 | # Resolve links: $0 may be a link
11 | PRG="$0"
12 | # Need this for relative symlinks.
13 | while [ -h "$PRG" ] ; do
14 | ls=`ls -ld "$PRG"`
15 | link=`expr "$ls" : '.*-> \(.*\)$'`
16 | if expr "$link" : '/.*' > /dev/null; then
17 | PRG="$link"
18 | else
19 | PRG=`dirname "$PRG"`"/$link"
20 | fi
21 | done
22 | SAVED="`pwd`"
23 | cd "`dirname \"$PRG\"`/" >/dev/null
24 | APP_HOME="`pwd -P`"
25 | cd "$SAVED" >/dev/null
26 |
27 | APP_NAME="Gradle"
28 | APP_BASE_NAME=`basename "$0"`
29 |
30 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
31 | DEFAULT_JVM_OPTS=""
32 |
33 | # Use the maximum available, or set MAX_FD != -1 to use that value.
34 | MAX_FD="maximum"
35 |
36 | warn () {
37 | echo "$*"
38 | }
39 |
40 | die () {
41 | echo
42 | echo "$*"
43 | echo
44 | exit 1
45 | }
46 |
47 | # OS specific support (must be 'true' or 'false').
48 | cygwin=false
49 | msys=false
50 | darwin=false
51 | nonstop=false
52 | case "`uname`" in
53 | CYGWIN* )
54 | cygwin=true
55 | ;;
56 | Darwin* )
57 | darwin=true
58 | ;;
59 | MINGW* )
60 | msys=true
61 | ;;
62 | NONSTOP* )
63 | nonstop=true
64 | ;;
65 | esac
66 |
67 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
68 |
69 | # Determine the Java command to use to start the JVM.
70 | if [ -n "$JAVA_HOME" ] ; then
71 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
72 | # IBM's JDK on AIX uses strange locations for the executables
73 | JAVACMD="$JAVA_HOME/jre/sh/java"
74 | else
75 | JAVACMD="$JAVA_HOME/bin/java"
76 | fi
77 | if [ ! -x "$JAVACMD" ] ; then
78 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
79 |
80 | Please set the JAVA_HOME variable in your environment to match the
81 | location of your Java installation."
82 | fi
83 | else
84 | JAVACMD="java"
85 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
86 |
87 | Please set the JAVA_HOME variable in your environment to match the
88 | location of your Java installation."
89 | fi
90 |
91 | # Increase the maximum file descriptors if we can.
92 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
93 | MAX_FD_LIMIT=`ulimit -H -n`
94 | if [ $? -eq 0 ] ; then
95 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
96 | MAX_FD="$MAX_FD_LIMIT"
97 | fi
98 | ulimit -n $MAX_FD
99 | if [ $? -ne 0 ] ; then
100 | warn "Could not set maximum file descriptor limit: $MAX_FD"
101 | fi
102 | else
103 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
104 | fi
105 | fi
106 |
107 | # For Darwin, add options to specify how the application appears in the dock
108 | if $darwin; then
109 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
110 | fi
111 |
112 | # For Cygwin, switch paths to Windows format before running java
113 | if $cygwin ; then
114 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
115 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
116 | JAVACMD=`cygpath --unix "$JAVACMD"`
117 |
118 | # We build the pattern for arguments to be converted via cygpath
119 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
120 | SEP=""
121 | for dir in $ROOTDIRSRAW ; do
122 | ROOTDIRS="$ROOTDIRS$SEP$dir"
123 | SEP="|"
124 | done
125 | OURCYGPATTERN="(^($ROOTDIRS))"
126 | # Add a user-defined pattern to the cygpath arguments
127 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
128 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
129 | fi
130 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
131 | i=0
132 | for arg in "$@" ; do
133 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
134 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
135 |
136 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
137 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
138 | else
139 | eval `echo args$i`="\"$arg\""
140 | fi
141 | i=$((i+1))
142 | done
143 | case $i in
144 | (0) set -- ;;
145 | (1) set -- "$args0" ;;
146 | (2) set -- "$args0" "$args1" ;;
147 | (3) set -- "$args0" "$args1" "$args2" ;;
148 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
149 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
150 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
151 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
152 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
153 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
154 | esac
155 | fi
156 |
157 | # Escape application args
158 | save () {
159 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
160 | echo " "
161 | }
162 | APP_ARGS=$(save "$@")
163 |
164 | # Collect all arguments for the java command, following the shell quoting and substitution rules
165 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
166 |
167 | # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
168 | if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
169 | cd "$(dirname "$0")"
170 | fi
171 |
172 | exec "$JAVACMD" "$@"
173 |
--------------------------------------------------------------------------------
/dashedview/src/test/java/com/mackhartley/dashedview/DashedViewTests.kt:
--------------------------------------------------------------------------------
1 | package com.mackhartley.dashedview
2 |
3 | import org.junit.Assert.assertEquals
4 | import org.junit.Assert.assertTrue
5 | import org.junit.Test
6 |
7 | class DashedViewTests {
8 |
9 | companion object {
10 | const val DELTA = 0.0001f
11 | }
12 |
13 | @Test
14 | fun get_dash_direction_left_right_correctly() {
15 | val dashDirection = getDashDirection(45)
16 | assertTrue(dashDirection is DashDirection.LeftToRight)
17 | assertTrue(!dashDirection.isHorizontal)
18 | }
19 |
20 | @Test
21 | fun get_dash_direction_left_right_horizontal_correctly() {
22 | val dashDirection = getDashDirection(0)
23 | assertTrue(dashDirection is DashDirection.LeftToRight)
24 | assertTrue(dashDirection.isHorizontal)
25 | }
26 |
27 | @Test
28 | fun get_dash_direction_right_left_correctly() {
29 | val dashDirection = getDashDirection(135)
30 | assertTrue(dashDirection is DashDirection.RightToLeft)
31 | assertTrue(!dashDirection.isHorizontal)
32 | }
33 |
34 | @Test
35 | fun get_dash_direction_vertical_correctly() {
36 | val dashDirection = getDashDirection(90)
37 | assertTrue(dashDirection is DashDirection.Vertical)
38 | }
39 |
40 | @Test
41 | fun calculate_end_point_x_trans_left_right() {
42 | val angle = 45
43 | val viewHeight = 100f
44 | val xTranslation = calculateEndPointXTranslation(angle, viewHeight)
45 | assertEquals(xTranslation, 100f)
46 | }
47 |
48 | @Test
49 | fun calculate_end_point_x_trans_right_left() {
50 | val angle = 135
51 | val viewHeight = 100f
52 | val xTranslation = calculateEndPointXTranslation(angle, viewHeight)
53 | assertEquals(xTranslation, -100f)
54 | }
55 |
56 | @Test
57 | fun calculate_end_point_x_trans_vertical() {
58 | val angle = 90
59 | val viewHeight = 100f
60 | val xTranslation = calculateEndPointXTranslation(angle, viewHeight)
61 | assertEquals(xTranslation, 0f, DELTA)
62 | }
63 |
64 | @Test
65 | fun calculate_end_point_x_trans_horizontal() {
66 | val angle = 0
67 | val viewHeight = 100f
68 | val xTranslation = calculateEndPointXTranslation(angle, viewHeight)
69 | assertEquals(xTranslation, viewHeight)
70 | }
71 |
72 | @Test
73 | fun calculate_modified_x_trans_start_point_left_right() {
74 | val xTranslation = 5.0
75 | val dashAngle = 45
76 | val isEndPoint = false
77 | val modifiedValue = calculateModifiedXTranslation(xTranslation, dashAngle, isEndPoint)
78 | assertEquals(modifiedValue, -5.0f)
79 | }
80 |
81 | @Test
82 | fun calculate_modified_x_trans_start_point_right_left() {
83 | val xTranslation = 5.0
84 | val dashAngle = 135
85 | val isEndPoint = false
86 | val modifiedValue = calculateModifiedXTranslation(xTranslation, dashAngle, isEndPoint)
87 | assertEquals(modifiedValue, 5.0f)
88 | }
89 |
90 | @Test
91 | fun calculate_modified_x_trans_end_point_left_right() {
92 | val xTranslation = 5.0
93 | val dashAngle = 45
94 | val isEndPoint = true
95 | val modifiedValue = calculateModifiedXTranslation(xTranslation, dashAngle, isEndPoint)
96 | assertEquals(modifiedValue, 5.0f)
97 | }
98 |
99 | @Test
100 | fun calculate_modified_x_trans_end_point_right_left() {
101 | val xTranslation = 5.0
102 | val dashAngle = 135
103 | val isEndPoint = true
104 | val modifiedValue = calculateModifiedXTranslation(xTranslation, dashAngle, isEndPoint)
105 | assertEquals(modifiedValue, -5.0f)
106 | }
107 |
108 | @Test
109 | fun calculate_modified_x_trans_vertical() {
110 | val xTranslation = 5.0
111 | val dashAngle = 90
112 | val isEndPoint = true
113 | val modifiedValue = calculateModifiedXTranslation(xTranslation, dashAngle, isEndPoint)
114 | assertEquals(modifiedValue, 0f, DELTA)
115 | }
116 |
117 | @Test
118 | fun calculate_horizontal_offset_left_right_dash() {
119 | val angle = 60
120 | val width = 10f
121 | val horizontalOffset = calculateHorizontalOffset(angle, width)
122 | assertEquals(horizontalOffset, 11.547006f, DELTA)
123 | }
124 |
125 | @Test
126 | fun calculate_horizontal_offset_right_left_dash() {
127 | val angle = 120
128 | val width = 10f
129 | val horizontalOffset = calculateHorizontalOffset(angle, width)
130 | assertEquals(horizontalOffset, 11.547006f, DELTA)
131 | }
132 |
133 | @Test
134 | fun calculate_horizontal_offset_vertical_dash() {
135 | val angle = 90
136 | val width = 10f
137 | val horizontalOffset = calculateHorizontalOffset(angle, width)
138 | assertEquals(horizontalOffset, 10.0f, DELTA)
139 | }
140 |
141 | @Test
142 | fun calculate_horizontal_offset_horizontal_dash() {
143 | val angle = 0
144 | val width = 10f
145 | val horizontalOffset = calculateHorizontalOffset(angle, width)
146 | assertEquals(horizontalOffset, 10.0f, DELTA)
147 | }
148 |
149 | @Test
150 | fun calculate_vertical_offset_left_right_dash() {
151 | val angle = 60
152 | val width = 10f
153 | val horizontalOffset = calculateVerticalOffset(angle, width)
154 | assertEquals(horizontalOffset, 20.0f, DELTA)
155 | }
156 |
157 | @Test
158 | fun calculate_vertical_offset_right_left_dash() {
159 | val angle = 60
160 | val width = 10f
161 | val horizontalOffset = calculateVerticalOffset(angle, width)
162 | assertEquals(horizontalOffset, 20.0f, DELTA)
163 | }
164 |
165 | @Test
166 | fun calculate_vertical_offset_vertical_dash() {
167 | val angle = 90
168 | val width = 10f
169 | val horizontalOffset = calculateVerticalOffset(angle, width)
170 | assertEquals(horizontalOffset, 10.0f, DELTA)
171 | }
172 |
173 | @Test
174 | fun calculate_vertical_offset_horizontal_dash() {
175 | val angle = 0
176 | val width = 10f
177 | val horizontalOffset = calculateVerticalOffset(angle, width)
178 | assertEquals(horizontalOffset, 10.0f, DELTA)
179 | }
180 | }
--------------------------------------------------------------------------------
/app/src/main/res/drawable/ic_launcher_background.xml:
--------------------------------------------------------------------------------
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2 |
7 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
85 |
90 |
95 |
100 |
105 |
110 |
115 |
120 |
125 |
130 |
135 |
140 |
145 |
150 |
155 |
160 |
165 |
170 |
171 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 |
2 | 
3 |
4 | DashedView
5 | The easiest way to create a dashed or striped background on Android
6 |
7 |
8 | 
9 | 
10 | 
11 | 
12 | 
13 |
14 |
15 | The `DashedView` library allows you to create views with a dashed (or striped) background. Below are some examples of views created with this library. You can click on any example to see its code.
16 |
17 |
18 | 
19 | 
20 |
21 | 
22 | 
23 |
24 |
25 |
26 | There is also a demo app for this library which allows you to see the look and feel of the `DashedView` on your own device:
27 |
28 |
29 | 
30 |
31 |
32 | Quick Start Guide
33 |
34 | If you don't have this already, add it to your **root** build.gradle file:
35 | ```
36 | allprojects {
37 | repositories {
38 | ...
39 | maven { url 'https://jitpack.io' }
40 | }
41 | }
42 | ```
43 |
44 | Then you can add the dependency to your **app** build.gradle file:
45 | ```
46 | dependencies {
47 | ...
48 | implementation 'com.github.MackHartley:DashedView:1.0.0'
49 | }
50 | ```
51 |
52 | Once that's finished you can declare a `DashedView` via XML:
53 | ```
54 |
62 | ```
63 |
64 | Usage ⚙️
65 |
66 | The table below explains the 5 XML attributes you can set on the `DashedView` class:
67 |
68 |
69 | | XML Attribute | Use |
70 | |---|---|
71 | | `dvDashAngle` | Sets the angle of the dashes. The angle is measured from the X axis of the view. |
72 | | `dvDashColor` | Sets the color of the dashes. |
73 | | `dvDashWidth` | Sets the width of the dashes. |
74 | | `dvSpaceBetweenDashes` | Sets the width of the space between each dash. |
75 | | `dvViewCornerRadius` | Sets the corner radius value for the `DashedView`. Useful when working with other views that have rounded corners. |
76 |
77 |
78 | The `DashedView` also has a public method that allows you to set custom coloring for individual dashes:
79 |
80 |
81 | | Public Method | Use |
82 | |---|---|
83 | | `setDashColorGenerator(...)` | This method takes a `DashColorGenerator` instance as a parameter which gives you access to the index of the current dash being drawn. Using that information you can specify logic for how each dash should be colored. |
84 |
85 | ```
86 | interface DashColorGenerator {
87 | @ColorInt fun getPaintColor(curIndex: Int, numDashes: Int): Int
88 | }
89 | ```
90 | To see an example of the `DashColorGenerator` click here.
91 |
92 | More Examples 🖼️
93 |
94 |
95 | Click on any example to see it's code (You also need to look at MainActivity which sets custom dash coloring)
96 |
97 |
98 | 
99 | 
100 | 
101 | 
102 |
103 | 
104 |
105 |
106 | # Contributing 🤝
107 | Feel free to open issues on this repo to report bugs or request features. Additionally if you'd like to contribute you can create a pull request (make sure to read contributing.mk).
108 |
109 | **Special thanks to all those who have supported this repo thus far!**
110 |
111 |
112 | 
113 |
114 | 
115 |
116 |
117 | # License 📄
118 | ```
119 | Copyright 2021 Mack Hartley
120 |
121 | Licensed under the Apache License, Version 2.0 (the "License");
122 | you may not use this file except in compliance with the License.
123 | You may obtain a copy of the License at
124 |
125 | http://www.apache.org/licenses/LICENSE-2.0
126 |
127 | Unless required by applicable law or agreed to in writing, software
128 | distributed under the License is distributed on an "AS IS" BASIS,
129 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
130 | See the License for the specific language governing permissions and
131 | limitations under the License.
132 | ```
133 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | Apache License
2 | Version 2.0, January 2004
3 | http://www.apache.org/licenses/
4 |
5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
6 |
7 | 1. Definitions.
8 |
9 | "License" shall mean the terms and conditions for use, reproduction,
10 | and distribution as defined by Sections 1 through 9 of this document.
11 |
12 | "Licensor" shall mean the copyright owner or entity authorized by
13 | the copyright owner that is granting the License.
14 |
15 | "Legal Entity" shall mean the union of the acting entity and all
16 | other entities that control, are controlled by, or are under common
17 | control with that entity. For the purposes of this definition,
18 | "control" means (i) the power, direct or indirect, to cause the
19 | direction or management of such entity, whether by contract or
20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the
21 | outstanding shares, or (iii) beneficial ownership of such entity.
22 |
23 | "You" (or "Your") shall mean an individual or Legal Entity
24 | exercising permissions granted by this License.
25 |
26 | "Source" form shall mean the preferred form for making modifications,
27 | including but not limited to software source code, documentation
28 | source, and configuration files.
29 |
30 | "Object" form shall mean any form resulting from mechanical
31 | transformation or translation of a Source form, including but
32 | not limited to compiled object code, generated documentation,
33 | and conversions to other media types.
34 |
35 | "Work" shall mean the work of authorship, whether in Source or
36 | Object form, made available under the License, as indicated by a
37 | copyright notice that is included in or attached to the work
38 | (an example is provided in the Appendix below).
39 |
40 | "Derivative Works" shall mean any work, whether in Source or Object
41 | form, that is based on (or derived from) the Work and for which the
42 | editorial revisions, annotations, elaborations, or other modifications
43 | represent, as a whole, an original work of authorship. For the purposes
44 | of this License, Derivative Works shall not include works that remain
45 | separable from, or merely link (or bind by name) to the interfaces of,
46 | the Work and Derivative Works thereof.
47 |
48 | "Contribution" shall mean any work of authorship, including
49 | the original version of the Work and any modifications or additions
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/app/src/main/res/layout/activity_main.xml:
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/dashedview/src/main/java/com/mackhartley/dashedview/DashedView.kt:
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1 | package com.mackhartley.dashedview
2 |
3 | import android.content.Context
4 | import android.graphics.Canvas
5 | import android.graphics.Color
6 | import android.graphics.Paint
7 | import android.graphics.Path
8 | import android.util.AttributeSet
9 | import android.view.View
10 | import androidx.annotation.ColorInt
11 | import kotlin.math.abs
12 | import kotlin.math.cos
13 | import kotlin.math.sin
14 | import kotlin.math.tan
15 |
16 | class DashedView @JvmOverloads constructor(
17 | context: Context,
18 | attrs: AttributeSet? = null,
19 | defStyleAttr: Int = 0
20 | ) : View(context, attrs, defStyleAttr) {
21 |
22 | // Instance state
23 | private var dashWidth = DEFAULT_WIDTH
24 | private var spaceBetweenDashes = DEFAULT_SPACE_BETWEEN_DASHES
25 | private var dashAngle = DEFAULT_DASH_ANGLE
26 | private var cornerRadius = DEFAULT_CORNER_RADIUS
27 | @ColorInt private var dashColor = DEFAULT_DASH_COLOR
28 | private var dashColorGenerator: DashColorGenerator? = null
29 |
30 | private var lastWidth = width // Used for keeping track of view size
31 | private var lastHeight = height // Used for keeping track of view size
32 |
33 | private val dashPaint by lazy {
34 | Paint().apply {
35 | strokeCap = Paint.Cap.BUTT
36 | color = dashColor
37 | strokeWidth = dashWidth
38 | isAntiAlias = true
39 | }
40 | }
41 |
42 | private val roundedCornersClipPath by lazy { // This path is used to clip the progress background and drawable to the desired corner radius
43 | Path().apply {
44 | addRoundRect(
45 | VIEW_LEFT,
46 | VIEW_TOP,
47 | lastWidth.toFloat(),
48 | lastHeight.toFloat(),
49 | floatArrayOf(cornerRadius, cornerRadius, cornerRadius, cornerRadius, cornerRadius, cornerRadius, cornerRadius, cornerRadius),
50 | Path.Direction.CW
51 | )
52 | }
53 | }
54 |
55 | companion object {
56 | const val DEFAULT_WIDTH = 12f
57 | const val DEFAULT_SPACE_BETWEEN_DASHES = 12f
58 | const val DEFAULT_DASH_ANGLE = 45 // Measured in degrees. Min 0, max 179. A value of 0 Degrees points to the right side of the view
59 | const val DEFAULT_CORNER_RADIUS = 0f
60 | const val DEFAULT_DASH_COLOR = Color.GRAY
61 | const val VIEW_LEFT = 0f
62 | const val VIEW_TOP = 0f
63 | }
64 |
65 | init {
66 | val attrRefs = context.obtainStyledAttributes(attrs, R.styleable.DashedView)
67 |
68 | val requestedWidth = attrRefs.getDimension(R.styleable.DashedView_dvDashWidth, DEFAULT_WIDTH)
69 | dashWidth = parseRequestedDashWidth(requestedWidth)
70 |
71 | val requestedAngle = attrRefs.getInteger(R.styleable.DashedView_dvDashAngle, DEFAULT_DASH_ANGLE)
72 | dashAngle = parseRequestedDashAngle(requestedAngle)
73 |
74 | spaceBetweenDashes = attrRefs.getDimension(R.styleable.DashedView_dvSpaceBetweenDashes, DEFAULT_SPACE_BETWEEN_DASHES)
75 | dashColor = attrRefs.getColor(R.styleable.DashedView_dvDashColor, DEFAULT_DASH_COLOR)
76 | cornerRadius = attrRefs.getDimension(R.styleable.DashedView_dvViewCornerRadius, DEFAULT_CORNER_RADIUS)
77 | attrRefs.recycle()
78 | }
79 |
80 | /**
81 | * [DashedView] only allows angles between 0 and 179 inclusive. Values outside of that range will
82 | * have a modulus operation applied to them.
83 | */
84 | private fun parseRequestedDashAngle(requestedAngle: Int): Int {
85 | return requestedAngle % 180
86 | }
87 |
88 | private fun parseRequestedDashWidth(requestedWidth: Float): Float {
89 | return if (requestedWidth <= 0f) 1f
90 | else requestedWidth
91 | }
92 |
93 | override fun onDraw(canvas: Canvas?) {
94 | if (canvas != null) {
95 |
96 | // Apply the requested rounded corner value
97 | canvas.clipPath(roundedCornersClipPath)
98 |
99 | // Get list of coordinates for dashes that need to be drawn
100 | val dashesOriginatingFromXAxis = getDashesOriginatingFromXAxis(
101 | dashWidth = dashWidth,
102 | spaceBetweenDashes = spaceBetweenDashes,
103 | dashAngle = dashAngle,
104 | viewWidth = width.toFloat(),
105 | viewHeight = height.toFloat()
106 | )
107 | val dashesOriginatingFromYAxis = getDashesOriginatingFromYAxis(
108 | dashWidth = dashWidth,
109 | spaceBetweenDashes = spaceBetweenDashes,
110 | dashAngle = dashAngle,
111 | viewWidth = width.toFloat(),
112 | viewHeight = height.toFloat()
113 | )
114 | val dashDirection = getDashDirection(dashAngle)
115 | val allDashesToDraw =
116 | if (dashDirection.isHorizontal) dashesOriginatingFromYAxis // If horizontal, only draw dashes originating from Y axis
117 | else when (dashDirection) {
118 | is DashDirection.LeftToRight -> dashesOriginatingFromYAxis.reversed() + dashesOriginatingFromXAxis
119 | is DashDirection.RightToLeft -> dashesOriginatingFromXAxis.reversed() + dashesOriginatingFromYAxis
120 | is DashDirection.Vertical -> dashesOriginatingFromXAxis // If vertical, only draw dashes originating from X axis
121 | }
122 |
123 | // Loop through coordinate list and draw dashes
124 | for ((index, dashCoordinates) in allDashesToDraw.withIndex()) {
125 | val startPoint = dashCoordinates.startPoint
126 | val endPoint = dashCoordinates.endPoint
127 | updatePaintColorIfNeeded(dashColorGenerator, index, allDashesToDraw.size)
128 |
129 | canvas.drawLine(startPoint.first, startPoint.second, endPoint.first, endPoint.second, dashPaint)
130 | }
131 | }
132 | }
133 |
134 | private fun updatePaintColorIfNeeded(
135 | dashColorGenerator: DashColorGenerator?,
136 | index: Int,
137 | numDashes: Int
138 | ) {
139 | if (dashColorGenerator != null) {
140 | dashPaint.color = dashColorGenerator.getPaintColor(index, numDashes)
141 | }
142 | }
143 |
144 | /**
145 | * Generates dashes with start points originating from the X axis.
146 | */
147 | private fun getDashesOriginatingFromXAxis(
148 | dashWidth: Float,
149 | spaceBetweenDashes: Float,
150 | dashAngle: Int,
151 | viewWidth: Float,
152 | viewHeight: Float
153 | ): List {
154 |
155 | // Check if horizontal config (0 degrees). If so, no dashes drawn from x axis
156 | val dashDirection = getDashDirection(dashAngle)
157 | if (dashDirection.isHorizontal) return emptyList()
158 |
159 | // Calculate start points
160 | val startPoints = mutableListOf>()
161 | val startYPosition = viewHeight
162 | val dashHorizontalOffset = calculateHorizontalOffset(dashAngle, dashWidth)
163 | val spaceHorizontalOffset = calculateHorizontalOffset(dashAngle, spaceBetweenDashes)
164 |
165 | var curXPosition: Float
166 | when (dashDirection) {
167 | is DashDirection.LeftToRight,
168 | is DashDirection.Vertical -> {
169 | curXPosition = VIEW_LEFT
170 | while (curXPosition <= viewWidth) {
171 | startPoints.add(Pair(curXPosition, startYPosition))
172 | curXPosition += abs(dashHorizontalOffset + spaceHorizontalOffset)
173 | }
174 | }
175 | is DashDirection.RightToLeft -> { // If the dashes are pointing from right to left, then start drawing dashes from the bottom right corner of the view
176 | curXPosition = viewWidth
177 | while (curXPosition >= VIEW_LEFT) {
178 | startPoints.add(Pair(curXPosition, startYPosition))
179 | curXPosition -= abs(dashHorizontalOffset + spaceHorizontalOffset)
180 | }
181 | }
182 | }
183 | startPoints.add(Pair(curXPosition, startYPosition)) // Add one more dash to ensure the view is fully covered by dashes
184 |
185 | // Calculate translation required to generate end point for a given start point
186 | // Apply translation to list of start points to get list of dash coordinates
187 | val endPointXTranslation = calculateEndPointXTranslation(dashAngle, viewHeight)
188 | val dashCoordinates = startPoints.map {
189 | DashInfo(
190 | startPoint = it,
191 | endPoint =
192 | generateEndPoint(
193 | startPoint = it,
194 | dashAngle = dashAngle,
195 | endPointXTranslation = endPointXTranslation,
196 | endPointYValue = VIEW_TOP,
197 | viewWidth = viewWidth
198 | )
199 | )
200 | }
201 |
202 | // Translate start and end points so all 4 corners of dash are drawn outside of the view
203 | val elongatedDashCoordinates = elongateDashesOriginatingFromXAxis(
204 | initialPositions = dashCoordinates,
205 | dashAngle = dashAngle,
206 | dashWidth = dashWidth
207 | )
208 |
209 | return elongatedDashCoordinates
210 | }
211 |
212 | /**
213 | * Generates dashes with start points originating on the Y axis.
214 | */
215 | private fun getDashesOriginatingFromYAxis(
216 | dashWidth: Float,
217 | spaceBetweenDashes: Float,
218 | dashAngle: Int,
219 | viewWidth: Float,
220 | viewHeight: Float
221 | ): List {
222 |
223 | // Check if vertical config (90 degrees). If so, no dashes should be drawn from the y axis
224 | val dashDirection = getDashDirection(dashAngle)
225 | if (dashDirection is DashDirection.Vertical) return emptyList()
226 |
227 | // Calculate start points
228 | val startPositions = mutableListOf>()
229 | val startXPosition = if (dashDirection is DashDirection.LeftToRight) VIEW_LEFT else viewWidth
230 |
231 | var curYPosition = viewHeight
232 |
233 | val dashVerticalOffset = calculateVerticalOffset(dashAngle, dashWidth)
234 | val spaceVerticalOffset = calculateVerticalOffset(dashAngle, spaceBetweenDashes)
235 | if (!dashDirection.isHorizontal) { // If dashes will be drawn from the x axis, then skip drawing a dash for the first y position because it is equal to the first x position
236 | curYPosition -= abs(dashVerticalOffset + spaceVerticalOffset)
237 | }
238 | while (curYPosition >= VIEW_TOP) {
239 | startPositions.add(Pair(startXPosition, curYPosition))
240 | curYPosition -= abs(dashVerticalOffset + spaceVerticalOffset)
241 | }
242 | startPositions.add(Pair(startXPosition, curYPosition)) // Add one more dash to ensure the view is fully covered by dashes
243 |
244 | // Calculate translation required to generate end point for a given start point
245 | // Apply translation to list of start points to get list of dash coordinates
246 | val transition = calculateEndPointXTranslation(dashAngle, viewHeight)
247 | val dashCoordinates = startPositions.map {
248 | DashInfo(
249 | startPoint = Pair(
250 | it.first,
251 | it.second
252 | ),
253 | endPoint = generateEndPoint(
254 | startPoint = it,
255 | dashAngle = dashAngle,
256 | endPointXTranslation = transition,
257 | endPointYValue = it.second - viewHeight, // Subtract view height because each of these dashes has a different start point Y value
258 | viewWidth = viewWidth
259 | )
260 | )
261 | }
262 |
263 | // Translate start and end points so all 4 corners of dash are drawn outside of the view
264 | val elongatedDashCoordinates = elongateDashesOriginatingFromYAxis(
265 | initialPositions = dashCoordinates,
266 | dashAngle = dashAngle,
267 | dashWidth = dashWidth
268 | )
269 |
270 | return elongatedDashCoordinates
271 | }
272 |
273 | /**
274 | * Elongate dashes enough so that all 4 corners of each dash are extended out of the view
275 | * canvas. This ensures the corners of the dashes/lines are not visible. This is more important
276 | * when dashes get thicker and resemble rectangles instead of dashes/lines.
277 | *
278 | * Affects Dashes that originate from the X axis.
279 | */
280 | private fun elongateDashesOriginatingFromXAxis(
281 | initialPositions: List,
282 | dashAngle: Int,
283 | dashWidth: Float
284 | ): List {
285 | val hypotenuseRadians = Math.toRadians((abs(90 - dashAngle).toDouble()))
286 | val translationHypotenuse = (dashWidth * tan((hypotenuseRadians))) / 2 // This is the amount the point must move
287 | val xTranslation = translationHypotenuse * sin(Math.toRadians((abs(90 - dashAngle).toDouble())))
288 | val yTranslation = translationHypotenuse * cos(Math.toRadians((abs(90 - dashAngle).toDouble())))
289 |
290 | return initialPositions.map {
291 | DashInfo(
292 | Pair(
293 | it.startPoint.first + calculateModifiedXTranslation(xTranslation, dashAngle, false),
294 | it.startPoint.second + yTranslation.toFloat()
295 | ),
296 | Pair(
297 | it.endPoint.first + calculateModifiedXTranslation(xTranslation, dashAngle, true),
298 | it.endPoint.second - yTranslation.toFloat()
299 | )
300 | )
301 | }
302 | }
303 |
304 | /**
305 | * Elongate dashes enough so that all 4 corners of each dash are extended out of the view
306 | * canvas. This ensures the corners of the dashes/lines are not visible. This is more important
307 | * when dashes get thicker and resemble rectangles instead of dashes/lines.
308 | *
309 | * Affects Dashes that originate from the Y axis.
310 | */
311 | private fun elongateDashesOriginatingFromYAxis(
312 | initialPositions: List,
313 | dashAngle: Int,
314 | dashWidth: Float
315 | ): List {
316 | val hypotenuseRadians = Math.toRadians(dashAngle.toDouble())
317 | val translationHypotenuse = (dashWidth * tan(hypotenuseRadians)) / 2 // This is the amount the point must move
318 | val xTranslation = abs(translationHypotenuse * cos(hypotenuseRadians)).toFloat()
319 | val yTranslation = abs(translationHypotenuse * sin(hypotenuseRadians)).toFloat()
320 |
321 | // Depending on the direction of dashes the translation value needs to be negative
322 | val xTranslationModifier = when (getDashDirection(dashAngle)) {
323 | is DashDirection.LeftToRight -> -1
324 | is DashDirection.RightToLeft -> 1
325 | DashDirection.Vertical -> 0
326 | }
327 |
328 | return initialPositions.map {
329 | DashInfo(
330 | Pair(
331 | it.startPoint.first + (xTranslation * xTranslationModifier),
332 | it.startPoint.second + yTranslation
333 | ),
334 | it.endPoint // End point can remain unchanged for dashes drawn from Y Axis. Their top corners wont show
335 | )
336 | }
337 | }
338 |
339 | /**
340 | * Generates the endpoint for a given start point based on the provided constraints.
341 | */
342 | private fun generateEndPoint(
343 | startPoint: Pair,
344 | dashAngle: Int,
345 | endPointXTranslation: Float,
346 | endPointYValue: Float,
347 | viewWidth: Float
348 | ): Pair {
349 | return if (getDashDirection(dashAngle).isHorizontal)
350 | Pair(viewWidth, startPoint.second)
351 | else
352 | Pair(startPoint.first + endPointXTranslation, endPointYValue)
353 | }
354 |
355 | override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
356 | lastWidth = w
357 | lastHeight = h
358 | }
359 |
360 | fun setDashColorGenerator(newDashColorGenerator: DashColorGenerator) {
361 | dashColorGenerator = newDashColorGenerator
362 | }
363 | }
--------------------------------------------------------------------------------