Use styled radio buttons for theme selection

res/css/_components.scss

@@ -115,6 +115,7 @@
 @import "./views/elements/_Slider.scss";
 @import "./views/elements/_Spinner.scss";
 @import "./views/elements/_StyledCheckbox.scss";
+@import "./views/elements/_StyledRadioButton.scss";
 @import "./views/elements/_SyntaxHighlight.scss";
 @import "./views/elements/_TextWithTooltip.scss";
 @import "./views/elements/_ToggleSwitch.scss";

res/css/views/elements/_StyledRadioButton.scss

@@ -0,0 +1,88 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/**
+* This component expects the parent to specify a positive padding and
+* width
+*/
+
+.mx_RadioButton {
+
+    $radio-circle-color: $muted-fg-color;
+    $active-radio-circle-color: $accent-color;
+    // We need to make this element positioned
+    // so that the radio circle can be absolute
+    position: relative;
+
+    display: flex;
+    align-items: center;
+    flex-grow: 1;
+
+    > span {
+        flex-grow: 1;
+
+        display: flex;
+        justify-content: center;
+    }
+
+    > input[type=radio] {
+        // Remove the OS's representation
+        margin: 0;
+        padding: 0;
+        display: none;
+
+        + div {
+            // Necessary to center the following span
+            position: absolute;
+
+            display: flex;
+            align-items: center;
+            justify-content: center;
+
+            box-sizing: border-box;
+            height: $font-16px;
+            width: $font-16px;
+
+            border: $font-1-5px solid $radio-circle-color;
+            border-radius: $font-16px;
+
+            > div {
+                box-sizing: border-box;
+
+                height: $font-8px;
+                width: $font-8px;
+
+                border-radius: $font-8px;
+            }
+        }
+    }
+
+    > input[type=radio]:checked {
+        + div {
+            > div {
+                background: $radio-circle-color;
+            }
+        }
+    }
+
+    > input[type=radio]:disabled {
+        + div {
+            > div {
+                display: none;
+            }
+        }
+    }
+}

res/css/views/settings/tabs/user/_AppearanceUserSettingsTab.scss

@@ -43,3 +43,58 @@ limitations under the License.
     padding-left: 20px;
     padding-right: 5px;
 }
+
+.mx_AppearanceUserSettingsTab_themeSection {
+    $radio-bg-color: $input-darker-bg-color;
+
+    > .mx_ThemeSelectors {
+        display: flex;
+        flex-direction: row;
+
+        margin-top: 23px;
+
+        > .mx_RadioButton {
+            padding: $font-16px;
+            border-radius: 10px;
+            background: rgba($radio-bg-color, 0.2);
+            width: 180px;
+            flex-shrink: 1;
+            flex-grow: 0;
+            margin-right: 15px;
+        }
+
+        > .mx_RadioButton:not([disabled]) {
+            // These need to be hardcoded because they don't change with the theme
+            &.mx_ThemeSelector_light {
+                background-color: #f3f8fd;
+                color: #2e2f32;
+            }
+
+            &.mx_ThemeSelector_dark {
+                background-color: #181b21;
+
+                > input > div {
+                    border-color: $input-darker-bg-color;
+                    > div {
+                        border-color: $input-darker-bg-color;
+                    }
+                }
+            }
+
+            &.mx_ThemeSelector_black {
+                background-color: #000000;
+
+                > input > div {
+                    border-color: $input-darker-bg-color;
+                    > div {
+                        border-color: $input-darker-bg-color;
+                    }
+                }
+            }
+        }
+    }
+}
+
+.mx_SettingsTab_customFontSizeField {
+    margin-left: calc($font-16px + 10px);
+}

src/components/views/elements/StyledRadioButton.tsx

@@ -0,0 +1,41 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the 'License');
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an 'AS IS' BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import classnames from 'classnames';
+
+interface IProps extends React.InputHTMLAttributes<HTMLInputElement> {
+}
+
+interface IState {
+}
+
+export default class StyledRadioButton extends React.PureComponent<IProps, IState> {
+
+    public static readonly defaultProps = {
+        className: '',
+    }
+
+    public render() {
+        const { children, className, ...otherProps } = this.props;
+        return <label className={classnames('mx_RadioButton', className)}>
+            <input type='radio' {...otherProps} />
+            {/* Used to render the radio button circle */}
+            <div><div></div></div>
+            <span>{children}</span>
+        </label>
+    }
+}

src/components/views/settings/tabs/user/AppearanceUserSettingsTab.tsx

@@ -103,7 +103,7 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
         };
     }
 
-    private onThemeChange = (e: React.ChangeEvent<HTMLSelectElement | HTMLInputElement>): void => {
+    private onThemeChange = (e: React.ChangeEvent<HTMLInputElement>): void => {
         const newTheme = e.target.value;
         if (this.state.theme === newTheme) return;
 
@@ -193,17 +193,19 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
 
     private renderThemeSection() {
         const SettingsFlag = sdk.getComponent("views.elements.SettingsFlag");
-        const LabelledToggleSwitch = sdk.getComponent("views.elements.LabelledToggleSwitch");
+        const StyledCheckbox = sdk.getComponent("views.elements.StyledCheckbox");
+        const StyledRadioButton = sdk.getComponent("views.elements.StyledRadioButton");
 
         const themeWatcher = new ThemeWatcher();
         let systemThemeSection: JSX.Element;
         if (themeWatcher.isSystemThemeSupported()) {
             systemThemeSection = <div>
-                <LabelledToggleSwitch
-                    value={this.state.useSystemTheme}
-                    label={SettingsStore.getDisplayName("use_system_theme")}
-                    onChange={this.onUseSystemThemeChanged}
-                />
+                <StyledCheckbox
+                    checked={this.state.useSystemTheme}
+                    onChange={(e) => this.onUseSystemThemeChanged(e.target.checked)}
+                >
+                    {SettingsStore.getDisplayName("use_system_theme")}
+                </StyledCheckbox>
             </div>;
         }
 
@@ -250,15 +252,19 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
             <div className="mx_SettingsTab_section mx_AppearanceUserSettingsTab_themeSection">
                 <span className="mx_SettingsTab_subheading">{_t("Theme")}</span>
                 {systemThemeSection}
-                <Field
-                    id="theme" label={_t("Theme")} element="select"
-                    value={this.state.theme} onChange={this.onThemeChange}
-                    disabled={this.state.useSystemTheme}
-                >
+                <div className="mx_ThemeSelectors" onChange={this.onThemeChange}>
                     {orderedThemes.map(theme => {
-                        return <option key={theme.id} value={theme.id}>{theme.name}</option>;
+                        return <StyledRadioButton
+                            value={theme.id}
+                            name={"theme"}
+                    disabled={this.state.useSystemTheme}
+                            checked={!this.state.useSystemTheme && theme.id === this.state.theme}
+                            className={"mx_ThemeSelector_" + theme.id}
+                >
+                            {theme.name}
+                        </StyledRadioButton>;
                     })}
-                </Field>
+                </div>
                 {customThemeForm}
                 <SettingsFlag name="useCompactLayout" level={SettingLevel.ACCOUNT} />
            </div>
@@ -302,7 +308,10 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
     render() {
         return (
             <div className="mx_SettingsTab">
-                <div className="mx_SettingsTab_heading">{_t("Appearance")}</div>
+                <div className="mx_SettingsTab_heading">{_t("Customise your appearance")}</div>
+                <div className="mx_SettingsTab_SubHeading">
+                    {_t("Appearance Settings only affect this Riot session.")}
+                </div>
                 {this.renderThemeSection()}
                 {SettingsStore.isFeatureEnabled("feature_font_scaling") ? this.renderFontSection() : null}
             </div>

src/i18n/strings/en_EN.json

@@ -777,7 +777,8 @@
     "Custom theme URL": "Custom theme URL",
     "Add theme": "Add theme",
     "Theme": "Theme",
-    "Appearance": "Appearance",
+    "Customise your appearance": "Customise your appearance",
+    "Appearance Settings only affect this Riot session.": "Appearance Settings only affect this Riot session.",
     "Flair": "Flair",
     "Failed to change password. Is your password correct?": "Failed to change password. Is your password correct?",
     "Success": "Success",
@@ -1753,6 +1754,7 @@
     "Upload %(count)s other files|one": "Upload %(count)s other file",
     "Cancel All": "Cancel All",
     "Upload Error": "Upload Error",
+    "Appearance": "Appearance",
     "Verify other session": "Verify other session",
     "Verification Request": "Verification Request",
     "A widget would like to verify your identity": "A widget would like to verify your identity",