Merge pull request #1218 from kiwix/Issue#413-multizim

UI for selecting the book to be used for title search

Author: kelson42

kiwix-desktop.pro

@@ -91,6 +91,7 @@ SOURCES += \
     src/fullscreenwindow.cpp \
     src/fullscreennotification.cpp \
     src/zimview.cpp \
+    src/multizimbutton.cpp \
 
 HEADERS += \
     src/choiceitem.h \
@@ -143,6 +144,7 @@ HEADERS += \
     src/zimview.h \
     src/portutils.h \
     src/css_constants.h \
+    src/multizimbutton.h \
 
 FORMS += \
     src/choiceitem.ui \

resources/css/style.css

@@ -75,6 +75,52 @@ SearchBar > QToolButton:hover {
     border-radius: 3px;
 }
 
+MultiZimButton QListWidget {
+    border: 0px;
+    outline: 0px;
+    padding: 5px 0px; /* XXX: duplicated in css_constants.h */
+    background-color: white;
+}
+
+MultiZimButton QListWidget::item {
+    padding: 0px 5px; /* XXX: duplicated in css_constants.h */
+    border: 1px solid transparent; /* XXX: duplicated in css_constants.h */
+    background-color: white;
+}
+
+MultiZimButton QListWidget::item:hover,
+MultiZimButton QListWidget::item:selected:active {
+    border: 1px solid #3366CC;
+    background-color: #D9E9FF;
+}
+
+MultiZimButton QScrollBar {
+    width: 5px; /* XXX: duplicated in css_constants.h */
+    border: none;
+    outline: none;
+}
+
+MultiZimButton QScrollBar::handle {
+    background-color: grey;
+}
+
+ZimItemWidget * {
+    background-color: transparent;
+}
+
+ZimItemWidget QLabel {
+    font-size: 16px;
+    line-height: 24px; /* XXX: duplicated in css_constants.h */
+}
+
+ZimItemWidget QRadioButton::indicator {
+    image: none;
+}
+
+ZimItemWidget QRadioButton::indicator:checked {
+    image: url(:/icons/tick.svg);
+}
+
 TopWidget QToolButton:pressed,
 TopWidget QToolButton::hover {
     border: 1px solid #3366CC;

resources/i18n/en.json

@@ -172,5 +172,6 @@
     "portable-disabled-tooltip": "Function disabled in portable mode",
     "scroll-next-tab": "Scroll to next tab",
     "scroll-previous-tab": "Scroll to previous tab",
-    "kiwix-search": "Kiwix search"
+    "kiwix-search": "Kiwix search",
+    "search-options": "Search Options"
 }

resources/i18n/qqq.json

@@ -180,5 +180,6 @@
 	"portable-disabled-tooltip": "Tooltip used to explain disabled components in the portable version.",
 	"scroll-next-tab": "Represents the action of scrolling to the next tab of the current tab which toward the end of the tab bar.",
 	"scroll-previous-tab": "Represents the action of scrolling to the previous tab of the current tab which toward the start of the tab bar.",
-	"kiwix-search": "Title text for a list of search results, which notes to the user those are from Kiwix's Search Engine"
+	"kiwix-search": "Title text for a list of search results, which notes to the user those are from Kiwix's Search Engine",
+	"search-options": "The term for a collection of additional search filtering options to help users narrow down search results."
 }

src/css_constants.h

@@ -28,6 +28,26 @@ namespace SearchBar{
     const int border = 1;
 }
 
+namespace MultiZimButton {
+namespace QListWidget {
+namespace item {
+    const int paddingHorizontal = 5;
+    const int border = 1;
+}
+    const int paddingVertical = 5;
+}
+
+namespace QScrollBar {
+    const int width = 5;
+}
+}
+
+namespace ZimItemWidget {
+namespace QLabel {
+    const int lineHeight = 24;
+}
+}
+
 namespace TopWidget {
 namespace QToolButton {
 namespace backButton {

src/kiwixapp.cpp

@@ -438,6 +438,8 @@ void KiwixApp::createActions()
     CREATE_ACTION_SHORTCUT(ToggleTOCAction, gt("table-of-content"), QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_1));
     HIDE_ACTION(ToggleTOCAction);
 
+    CREATE_ACTION_ICON_SHORTCUT(OpenMultiZimAction, "filter", gt("search-options"), QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_L));
+
     CREATE_ACTION_ONOFF_ICON_SHORTCUT(ToggleReadingListAction, "reading-list-active", "reading-list", gt("reading-list"), QKeySequence(Qt::CTRL | Qt::Key_B));
 
     CREATE_ACTION(ExportReadingListAction, gt("export-reading-list"));

src/kiwixapp.h

@@ -39,6 +39,7 @@ class KiwixApp : public QtSingleApplication
         BrowseLibraryAction,
         OpenFileAction,
         OpenRecentAction,
+        OpenMultiZimAction,
         SavePageAsAction,
         SearchArticleAction,
         SearchLibraryAction,

src/mainmenu.cpp

@@ -35,6 +35,7 @@ MainMenu::MainMenu(QWidget *parent) :
     m_editMenu.ADD_ACTION(SearchLibraryAction);
     m_editMenu.ADD_ACTION(FindInPageAction);
     m_editMenu.ADD_ACTION(ToggleAddBookmarkAction);
+    m_editMenu.ADD_ACTION(OpenMultiZimAction);
     addMenu(&m_editMenu);
 
     m_viewMenu.setTitle(gt("view"));

src/multizimbutton.cpp

@@ -0,0 +1,167 @@
+#include <QListWidget>
+#include <QMenu>
+#include <QWidgetAction>
+#include <QButtonGroup>
+#include <QRadioButton>
+#include "kiwixapp.h"
+#include "multizimbutton.h"
+#include "css_constants.h"
+
+QString getElidedText(const QFont& font, int length, const QString& text);
+
+MultiZimButton::MultiZimButton(QWidget *parent) :
+    QToolButton(parent), 
+    mp_buttonList(new QListWidget),
+    mp_radioButtonGroup(new QButtonGroup(this))
+{
+    setMenu(new QMenu(this));
+    setPopupMode(QToolButton::InstantPopup);
+    setDefaultAction(KiwixApp::instance()->getAction(KiwixApp::OpenMultiZimAction));
+    connect(this, &QToolButton::triggered, this, &MultiZimButton::showMenu);
+
+    const auto popupAction = new QWidgetAction(menu());
+    popupAction->setDefaultWidget(mp_buttonList);
+    menu()->addAction(popupAction);
+
+    connect(mp_buttonList, &QListWidget::currentRowChanged, this, [=](int row){
+        if (const auto widget = getZimWidget(row))
+            widget->getRadioButton()->setChecked(true);
+    });
+}
+
+void MultiZimButton::updateDisplay()
+{
+    mp_buttonList->clear();
+    for (const auto& button : mp_radioButtonGroup->buttons())
+        mp_radioButtonGroup->removeButton(button);
+
+    const auto library = KiwixApp::instance()->getLibrary();
+    const auto view = KiwixApp::instance()->getTabWidget()->currentWebView();
+    QListWidgetItem* currentItem = nullptr;
+    QIcon currentIcon;
+    const int paddingTopBot = CSS::MultiZimButton::QListWidget::paddingVertical * 2;
+    const int itemHeight = paddingTopBot + CSS::ZimItemWidget::QLabel::lineHeight;
+    for (const auto& bookId : library->getBookIds())
+    {
+        try
+        {
+            library->getArchive(bookId);
+        } catch (...) { continue; }
+
+        const QString bookTitle = QString::fromStdString(library->getBookById(bookId).getTitle());
+        const QIcon zimIcon = library->getBookIcon(bookId);
+        
+        const auto item = new QListWidgetItem();
+        item->setData(Qt::UserRole, bookId);
+        item->setData(Qt::DisplayRole, bookTitle);
+        item->setSizeHint(QSize(0, itemHeight));
+
+        if (view && view->zimId() == bookId)
+        {
+            currentItem = item;
+            currentIcon = zimIcon;
+            continue;
+        }
+
+        mp_buttonList->addItem(item);
+        setItemZimWidget(item, bookTitle, zimIcon);
+    }
+
+    mp_buttonList->sortItems();
+    if (currentItem)
+    {
+        mp_buttonList->insertItem(0, currentItem);
+
+        const auto title = currentItem->data(Qt::DisplayRole).toString();
+        setItemZimWidget(currentItem, "*" + title, currentIcon);
+    }
+
+    /* Display should not be used other than for sorting. */
+    for (int i = 0; i < mp_buttonList->count(); i++)
+        mp_buttonList->item(i)->setData(Qt::DisplayRole, QVariant());
+
+    setDisabled(mp_buttonList->model()->rowCount() == 0);
+
+    mp_buttonList->scrollToTop();
+    mp_buttonList->setCurrentRow(0);
+
+    /* We set a maximum display height for list. Respect padding. */
+    const int listHeight = itemHeight * std::min(7, mp_buttonList->count());
+    mp_buttonList->setFixedHeight(listHeight + paddingTopBot);
+    mp_buttonList->setFixedWidth(menu()->width());
+}
+
+QStringList MultiZimButton::getZimIds() const
+{
+    QStringList idList;
+    for (int row = 0; row < mp_buttonList->count(); row++)
+    {
+        const auto widget = getZimWidget(row);
+        if (widget && widget->getRadioButton()->isChecked())
+            idList.append(mp_buttonList->item(row)->data(Qt::UserRole).toString());
+    }
+    return idList;
+}
+
+ZimItemWidget *MultiZimButton::getZimWidget(int row) const
+{
+    const auto widget = mp_buttonList->itemWidget(mp_buttonList->item(row));
+    return qobject_cast<ZimItemWidget *>(widget);
+}
+
+void MultiZimButton::setItemZimWidget(QListWidgetItem *item,
+                                      const QString &title, const QIcon &icon)
+{
+    const auto zimWidget = new ZimItemWidget(title, icon);
+    mp_radioButtonGroup->addButton(zimWidget->getRadioButton());
+    mp_buttonList->setItemWidget(item, zimWidget);
+}
+
+ZimItemWidget::ZimItemWidget(QString text, QIcon icon, QWidget *parent) :
+    QWidget(parent),
+    textLabel(new QLabel(this)),
+    iconLabel(new QLabel(this)),
+    radioBt(new QRadioButton(this))
+{
+    setLayout(new QHBoxLayout);
+
+    const int paddingHorizontal = CSS::MultiZimButton::QListWidget::item::paddingHorizontal;
+    layout()->setSpacing(paddingHorizontal);
+    layout()->setContentsMargins(0, 0, 0, 0);
+
+    const int iconWidth = CSS::ZimItemWidget::QLabel::lineHeight;
+    const QSize iconSize = QSize(iconWidth, iconWidth);
+    iconLabel->setPixmap(icon.pixmap(iconSize));
+
+    /* Align text on same side irregardless of text direction. */
+    const bool needAlignReverse = KiwixApp::isRightToLeft() == text.isRightToLeft();
+    const auto align = needAlignReverse ? Qt::AlignLeft : Qt::AlignRight;
+    textLabel->setAlignment({Qt::AlignVCenter | align});
+
+    /* Need to align checkmark with select all button. Avoid scroller from 
+       changing checkmark position by always leaving out space on scroller's 
+       side. Do this by align items to the other side and reducing the total
+       length. textLabel is the only expandable element here.
+
+       We set textLabel width to make sure the entire length always leave out 
+       a fixed amount of white space for scroller.
+    */
+    layout()->setAlignment({Qt::AlignVCenter | Qt::AlignLeading});
+    const auto menu = KiwixApp::instance()->getSearchBar().getMultiZimButton().menu();
+    const int iconAndCheckerWidth = iconWidth * 2;
+    const int totalSpacing = paddingHorizontal * 4;
+
+    /* Add an extra border to counteract item border on one side */
+    const int border = CSS::MultiZimButton::QListWidget::item::border;
+    const int scrollerWidth = CSS::MultiZimButton::QScrollBar::width;
+    const int contentWidthExcludeText = iconAndCheckerWidth + totalSpacing + scrollerWidth + border;
+    const int labelWidth = menu->width() - contentWidthExcludeText;
+    textLabel->setFixedWidth(labelWidth);
+
+    QString elidedText = getElidedText(textLabel->font(), labelWidth, text);
+    textLabel->setText(elidedText == text ? text : elidedText.trimmed() + "(...)");
+
+    layout()->addWidget(iconLabel);
+    layout()->addWidget(textLabel);
+    layout()->addWidget(radioBt);
+}

src/multizimbutton.h

@@ -0,0 +1,44 @@
+#ifndef MULTIZIMBUTTON_H
+#define MULTIZIMBUTTON_H
+
+#include <QToolButton>
+
+class QListWidget;
+class QButtonGroup;
+class QListWidgetItem;
+class QRadioButton;
+class QLabel;
+
+class ZimItemWidget : public QWidget {
+    Q_OBJECT
+
+public:
+    ZimItemWidget(QString text, QIcon icon, QWidget *parent = nullptr);
+
+    QRadioButton* getRadioButton() const { return radioBt; }
+
+private:
+    QLabel* textLabel;
+    QLabel* iconLabel;
+    QRadioButton* radioBt;
+};
+
+class MultiZimButton : public QToolButton {
+    Q_OBJECT
+
+public:
+    explicit MultiZimButton(QWidget *parent = nullptr);
+
+public slots:
+    void updateDisplay();
+    QStringList getZimIds() const;
+
+private:
+    QListWidget* mp_buttonList;
+    QButtonGroup* mp_radioButtonGroup;
+
+    ZimItemWidget* getZimWidget(int row) const;
+    void setItemZimWidget(QListWidgetItem* item, const QString& title, const QIcon& icon);
+};
+
+#endif // MULTIZIMBUTTON_H