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Add tooltip popup on hover for pie chart #44

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Add tooltip popup on hover for pie chart #44

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cc4f9f1
Add tooltip popup on hover for pie chart
yooian Nov 2, 2024
34deb4a
Add white tooltip background and text color
yooian Nov 2, 2024
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139 changes: 102 additions & 37 deletions app/views/_pie.html.erb
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Original file line number Diff line number Diff line change
Expand Up @@ -5,13 +5,17 @@
<%- arc_y = 150 %>
<%- cumulative_percent = 0 %>
<%- cumulative_angle = -180 %>

<%# Calculate arc coordinates to draw each slice %>
<%- data.each_with_index do |object, index| %>
<%- cumulative_percent += object[:percent_value] %>
<path class="pie-slice" id="pie-slice-<%= index %>" d="M 150 150 L <%= arc_x %> <%= arc_y %> A 125 125 0
<%= object[:percent_value] > 0.5 ? 1 : 0 %> 1
<%= 150 - 125 * Math.cos(2 * Math::PI * cumulative_percent) %>
<%= 150 - 125 * Math.sin(2 * Math::PI * cumulative_percent) %> Z"
<path
class="pie-slice"
id="pie-slice-<%= index %>"
d="M 150 150 L <%= arc_x %> <%= arc_y %> A 125 125 0
<%= object[:percent_value] > 0.5 ? 1 : 0 %> 1
<%= 150 - 125 * Math.cos(2 * Math::PI * cumulative_percent) %>
<%= 150 - 125 * Math.sin(2 * Math::PI * cumulative_percent) %> Z"
stroke="<%= object[:is_negative] == 1 ? object[:color] : 'White' %>"
stroke-dasharray= '<%= object[:is_negative] == 1 ? 30 : 0 %>'
fill="<%= object[:is_negative] == 1 ? 'White' : object[:color] %>"
Expand All @@ -28,6 +32,40 @@
transform='rotate(<%= cumulative_angle %>, 150, 150)'/>
<%- cumulative_angle += 360 * object[:percent_value] %>
<% end %>

<%# This generates the svg tooltips on top of the pie slices %>
<%- data.each_with_index do |object, index| %>
<%- cumulative_percent += object[:percent_value] %>
<%- arc_x = 150 - 125 * Math.cos(2 * Math::PI * cumulative_percent) %>
<%- arc_y = 150 - 125 * Math.sin(2 * Math::PI * cumulative_percent) %>

<%# Background rectangle for the tooltip %>
<%# x - 5 is padding before the text, y - 15 is half the height, width + 1 is padding, *8px per char, +5 is for the x padding %>
<rect class="pie-slice-rect"
id="pie-slice-rect-<%= index %>"
x="<%= arc_x * 0.5 - 5%>"
y="<%= arc_y - 15 %>"
width="<%= (object[:name].length + object[:value].to_s.length + 1) * 8 + 5 %>"
height="30"
fill="white"
stroke="gray"
stroke-opacity="40%"
stroke-width="1px"
rx="5" ry="5"
visibility="hidden"
pointer-events="none"/>

<%# Tooltip for each pie slice %>
<text class="pie-slice-tooltip"
id="pie-slice-tooltip-<%= index %>"
x="<%= arc_x * 0.5 %>"
y="<%= arc_y %>">
<tspan style="fill: <%= object[:color] %>;" pointer-events="none"><%= object[:name] %>:</tspan>
<tspan style="fill: black;" pointer-events="none"><%= object[:value] %></tspan>
</text>

<%- cumulative_angle += 360 * object[:percent_value] %>
<% end %>
</svg>
<%# Pie chart key %>
<div class="pie-key-flex-container">
Expand All @@ -42,43 +80,70 @@
</div>

<style>
<%# Styling for hover effects between chart and key %>
<%# Styling for tooltips %>
<%- data.each_with_index do |object, index| %>
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-key-circle-<%= index %> {
stroke: <%= object[:color] %>;
r: 5%;
fill-opacity: 0.5;
transition: 0.05s all ease;
}
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-key-text-<%= index %> {
fill: <%= object[:color] %>;
transform: translateX(2.5%);
transition: 0.2s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-<%= index %> {
fill-opacity: 0.8;
transform: translateX(0.1%);
transition: 0.25s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-arc-<%= index %> {
fill-opacity: 0.8;
stroke-opacity: 0.3;
transition: 0.05s all ease;
}
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-slice-tooltip-<%= index %> {
visibility: visible;
opacity: 1; /* Fade in */
transform: translateY(-50%);
transition: 0.25s all ease;
}
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-slice-rect-<%= index %> {
visibility: visible;
opacity: 1;
transform: translateY(-5%);
transition: 0.25s all ease;
}
<% end %>

#pie-key-<%= index %>:hover #pie-key-circle-<%= index %> {
stroke: <%= object[:color] %>;
r: 5%;
fill-opacity: 0.5;
transition: 0.05s all ease;
}
<%# Styling for hover effects between chart and key %>
<%- data.each_with_index do |object, index| %>
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-key-circle-<%= index %> {
stroke: <%= object[:color] %>;
r: 5%;
fill-opacity: 0.5;
transition: 0.05s all ease;
}
.pie-flex-container:has(#pie-slice-<%= index %>:hover) #pie-key-text-<%= index %> {
fill: <%= object[:color] %>;
transform: translateX(2.5%);
transition: 0.2s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-<%= index %> {
fill-opacity: 0.8;
transform: translateX(0.1%);
transition: 0.25s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-arc-<%= index %> {
fill-opacity: 0.8;
stroke-opacity: 0.3;
transition: 0.05s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-tooltip-<%= index %> {
visibility: visible;
opacity: 1;
transform: translateY(-50%);
transition: 0.25s all ease;
}
.pie-flex-container:has(#pie-key-<%= index %>:hover) #pie-slice-rect-<%= index %> {
visibility: visible;
opacity: 1;
transform: translateY(-5%);
transition: 0.25s all ease;
}

#pie-key-<%= index %>:hover #pie-key-text-<%= index %> {
fill: <%= object[:color] %>;
transform: translateX(2.5%);
transition: 0.2s all ease;
}
#pie-key-<%= index %>:hover #pie-key-circle-<%= index %> {
stroke: <%= object[:color] %>;
r: 5%;
fill-opacity: 0.5;
transition: 0.05s all ease;
}

#pie-key-<%= index %>:hover #pie-key-text-<%= index %> {
fill: <%= object[:color] %>;
transform: translateX(2.5%);
transition: 0.2s all ease;
}
<% end %>

</style>
Expand Down
15 changes: 15 additions & 0 deletions app/views/_styles.html.erb
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Original file line number Diff line number Diff line change
Expand Up @@ -156,6 +156,21 @@ h4.purechart {
min-height: 15px;
}

.pie-slice-tooltip {
position: absolute;
top: 50%;
left: 50%;

padding: 8px;

background-color: #fff;
border-radius: 8px;
box-shadow: rgba(0, 0, 0, 0.25) 0px 10px 36px 0px, rgba(0, 0, 0, 0.15) 0px 0px 0px 1px;

opacity: 0;
}


.bar-chart-bar {
height: 16px;
}
Expand Down