Пример #1
0
class PreviewBrowser(QWidget):
    """A Preview Browser for recent/premade scheme selection.
    """

    # Emitted when the current previewed item changes
    currentIndexChanged = Signal(int)

    # Emitted when an item is double clicked in the preview list.
    activated = Signal(int)

    def __init__(self, *args):
        QWidget.__init__(self, *args)
        self.__model = None
        self.__currentIndex = -1
        self.__template = DESCRIPTION_TEMPLATE
        self.__setupUi()

    def __setupUi(self):
        vlayout = QVBoxLayout()
        vlayout.setContentsMargins(0, 0, 0, 0)
        top_layout = QHBoxLayout()
        top_layout.setContentsMargins(12, 12, 12, 12)

        # Top row with full text description and a large preview
        # image.
        self.__label = QLabel(
            self,
            objectName="description-label",
            wordWrap=True,
            alignment=Qt.AlignTop | Qt.AlignLeft,
        )

        self.__label.setWordWrap(True)
        self.__label.setFixedSize(220, PREVIEW_SIZE[1])

        self.__image = QSvgWidget(self, objectName="preview-image")
        self.__image.setFixedSize(*PREVIEW_SIZE)

        self.__imageFrame = DropShadowFrame(self)
        self.__imageFrame.setWidget(self.__image)

        # Path text below the description and image
        path_layout = QHBoxLayout()
        path_layout.setContentsMargins(12, 0, 12, 0)
        path_label = QLabel("<b>{0!s}</b>".format(self.tr("Path:")),
                            self,
                            objectName="path-label")

        self.__path = TextLabel(self, objectName="path-text")

        path_layout.addWidget(path_label)
        path_layout.addWidget(self.__path)

        self.__selectAction = QAction(self.tr("Select"),
                                      self,
                                      objectName="select-action")

        top_layout.addWidget(self.__label,
                             1,
                             alignment=Qt.AlignTop | Qt.AlignLeft)
        top_layout.addWidget(self.__image,
                             1,
                             alignment=Qt.AlignTop | Qt.AlignRight)

        vlayout.addLayout(top_layout)
        vlayout.addLayout(path_layout)

        # An list view with small preview icons.
        self.__previewList = LinearIconView(objectName="preview-list-view")
        self.__previewList.doubleClicked.connect(self.__onDoubleClicked)

        vlayout.addWidget(self.__previewList)
        self.setLayout(vlayout)

    def setModel(self, model):
        """Set the item model for preview.
        """
        if self.__model != model:
            if self.__model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.disconnect(self.__onSelectionChanged)
                self.__model.dataChanged.disconnect(self.__onDataChanged)

            self.__model = model
            self.__previewList.setModel(model)

            if model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.connect(self.__onSelectionChanged)
                self.__model.dataChanged.connect(self.__onDataChanged)

            if model and model.rowCount():
                self.setCurrentIndex(0)

    def model(self):
        """Return the item model.
        """
        return self.__model

    def setPreviewDelegate(self, delegate):
        """Set the delegate to render the preview images.
        """
        raise NotImplementedError

    def setDescriptionTemplate(self, template):
        self.__template = template
        self.__update()

    def setCurrentIndex(self, index):
        """Set the selected preview item index.
        """
        if self.__model is not None and self.__model.rowCount():
            index = min(index, self.__model.rowCount() - 1)
            index = self.__model.index(index, 0)
            sel_model = self.__previewList.selectionModel()
            # This emits selectionChanged signal and triggers
            # __onSelectionChanged, currentIndex is updated there.
            sel_model.select(index, sel_model.ClearAndSelect)

        elif self.__currentIndex != -1:
            self.__currentIndex = -1
            self.__update()
            self.currentIndexChanged.emit(-1)

    def currentIndex(self):
        """Return the current selected index.
        """
        return self.__currentIndex

    def __onSelectionChanged(self, *args):
        """Selected item in the preview list has changed.
        Set the new description and large preview image.

        """
        rows = self.__previewList.selectedIndexes()
        if rows:
            index = rows[0]
            self.__currentIndex = index.row()
        else:
            index = QModelIndex()
            self.__currentIndex = -1

        self.__update()
        self.currentIndexChanged.emit(self.__currentIndex)

    def __onDataChanged(self, topleft, bottomRight):
        """Data changed, update the preview if current index in the changed
        range.

        """
        if (self.__currentIndex <= topleft.row()
                and self.__currentIndex >= bottomRight.row()):
            self.__update()

    def __onDoubleClicked(self, index):
        """Double click on an item in the preview item list.
        """
        self.activated.emit(index.row())

    def __update(self):
        """Update the current description.
        """
        if self.__currentIndex != -1:
            index = self.model().index(self.__currentIndex, 0)
        else:
            index = QModelIndex()

        if not index.isValid():
            description = ""
            name = ""
            path = ""
            svg = NO_PREVIEW_SVG
        else:
            description = str(index.data(Qt.WhatsThisRole))
            if not description:
                description = "No description."

            description = escape(description)
            description = description.replace("\n", "<br/>")

            name = str(index.data(Qt.DisplayRole))
            if not name:
                name = "Untitled"

            name = escape(name)
            path = str(index.data(Qt.StatusTipRole))

            svg = str(index.data(previewmodel.ThumbnailSVGRole))

        desc_text = self.__template.format(description=description, name=name)

        self.__label.setText(desc_text)

        self.__path.setText(path)

        if not svg:
            svg = NO_PREVIEW_SVG

        if svg:
            self.__image.load(QByteArray(svg.encode("utf-8")))
Пример #2
0
class PreviewBrowser(QWidget):
    """
    A Preview Browser for recent/example workflow selection.
    """
    # Emitted when the current previewed item changes
    currentIndexChanged = Signal(int)

    # Emitted when an item is double clicked in the preview list.
    activated = Signal(int)

    def __init__(self, *args, heading="", previewMargins=12, **kwargs):
        # type: (Any, str, int, Any) -> None
        super().__init__(*args, **kwargs)
        self.__model = None  # type: Optional[QAbstractItemModel]
        self.__currentIndex = -1
        self.__template = DESCRIPTION_TEMPLATE
        self.__margin = previewMargins

        vlayout = QVBoxLayout()
        vlayout.setContentsMargins(0, 0, 0, 0)
        top_layout = QVBoxLayout(objectName="top-layout")
        margin = self.__margin
        top_layout.setContentsMargins(margin, margin, margin, margin)
        # Optional heading label

        self.__heading = QLabel(self, objectName="heading", visible=False)
        # Horizontal row with full text description and a large preview
        # image.
        hlayout = QHBoxLayout()
        hlayout.setContentsMargins(0, 0, 0, 0)
        self.__label = QLabel(self,
                              objectName="description-label",
                              wordWrap=True,
                              alignment=Qt.AlignTop | Qt.AlignLeft)

        self.__label.setWordWrap(True)
        self.__label.setFixedSize(220, PREVIEW_SIZE[1])
        self.__label.setMinimumWidth(PREVIEW_SIZE[0] // 2)
        self.__label.setMaximumHeight(PREVIEW_SIZE[1])

        self.__image = QSvgWidget(self, objectName="preview-image")
        self.__image.setFixedSize(*PREVIEW_SIZE)

        self.__imageFrame = DropShadowFrame(self)
        self.__imageFrame.setWidget(self.__image)

        hlayout.addWidget(self.__label)
        hlayout.addWidget(self.__image)

        # Path text below the description and image
        path_layout = QHBoxLayout()
        path_layout.setContentsMargins(0, 0, 0, 0)
        path_label = QLabel("<b>{0!s}</b>".format(self.tr("Path:")),
                            self,
                            objectName="path-label")
        self.__path = TextLabel(self, objectName="path-text")

        path_layout.addWidget(path_label)
        path_layout.addWidget(self.__path)

        top_layout.addWidget(self.__heading)
        top_layout.addLayout(hlayout)
        top_layout.addLayout(path_layout)

        vlayout.addLayout(top_layout)

        # An list view with small preview icons.
        self.__previewList = LinearIconView(objectName="preview-list-view",
                                            wordWrap=True)
        self.__previewList.doubleClicked.connect(self.__onDoubleClicked)

        vlayout.addWidget(self.__previewList)
        self.setLayout(vlayout)

        self.setHeading(heading)

    def setHeading(self, text):
        # type: (str) -> None
        """
        Set the heading text.

        Parameters
        ----------
        text: str
            The new heading text. If empty the heading is hidden.
        """
        self.__heading.setVisible(bool(text))
        self.__heading.setText(text)

    def setPreviewMargins(self, margin):
        # type: (int) -> None
        """
        Set the left, top and right margins of the top widget part (heading
        and description)

        Parameters
        ----------
        margin : int
            Margin
        """
        if margin != self.__margin:
            layout = self.layout().itemAt(0).layout()
            assert isinstance(layout, QVBoxLayout)
            assert layout.objectName() == "top-layout"
            layout.setContentsMargins(margin, margin, margin, 0)

    def setModel(self, model):
        # type: (QAbstractItemModel) -> None
        """
        Set the item model for preview.

        Parameters
        ----------
        model : QAbstractItemModel
        """
        if self.__model != model:
            if self.__model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.disconnect(self.__onSelectionChanged)
                self.__model.dataChanged.disconnect(self.__onDataChanged)

            self.__model = model
            self.__previewList.setModel(model)

            if model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.connect(self.__onSelectionChanged)
                self.__model.dataChanged.connect(self.__onDataChanged)

            if model and model.rowCount():
                self.setCurrentIndex(0)

    def model(self):
        # type: () -> Optional[QAbstractItemModel]
        """
        Return the item model.
        """
        return self.__model

    def setDescriptionTemplate(self, template):
        self.__template = template
        self.__update()

    def setCurrentIndex(self, index):
        # type: (int) -> None
        """
        Set the selected preview item index.

        Parameters
        ----------
        index : int
            The current selected index.
        """
        if self.__model is not None and self.__model.rowCount():
            index = min(index, self.__model.rowCount() - 1)
            index = self.__model.index(index, 0)
            sel_model = self.__previewList.selectionModel()
            # This emits selectionChanged signal and triggers
            # __onSelectionChanged, currentIndex is updated there.
            sel_model.select(index, sel_model.ClearAndSelect)
        elif self.__currentIndex != -1:
            self.__currentIndex = -1
            self.__update()
            self.currentIndexChanged.emit(-1)

    def currentIndex(self):  # type: () -> int
        """
        Return the current selected index.
        """
        return self.__currentIndex

    def __onSelectionChanged(self):
        # type: () -> None
        """Selected item in the preview list has changed.
        Set the new description and large preview image.
        """
        rows = self.__previewList.selectedIndexes()
        if rows:
            index = rows[0]
            self.__currentIndex = index.row()
        else:
            self.__currentIndex = -1

        self.__update()
        self.currentIndexChanged.emit(self.__currentIndex)

    def __onDataChanged(self, topLeft, bottomRight):
        # type: (QModelIndex, QModelIndex) -> None
        """Data changed, update the preview if current index in the changed
        range.
        """
        if topLeft.row() <= self.__currentIndex <= bottomRight.row():
            self.__update()

    def __onDoubleClicked(self, index):
        # type: (QModelIndex) -> None
        """Double click on an item in the preview item list.
        """
        self.activated.emit(index.row())

    def __update(self):
        # type: () -> None
        """Update the current description.
        """
        if self.__currentIndex != -1 and self.__model is not None:
            index = self.__model.index(self.__currentIndex, 0)
        else:
            index = QModelIndex()

        if not index.isValid():
            description = ""
            name = ""
            path = ""
            svg = NO_PREVIEW_SVG
        else:
            description = index.data(Qt.WhatsThisRole)
            if description:
                description = description
            else:
                description = "没有说明。"

            description = escape(description)
            description = description.replace("\n", "<br/>")

            name = index.data(Qt.DisplayRole)
            if name:
                name = name
            else:
                name = "Untitled"

            name = escape(name)
            path = str(index.data(Qt.StatusTipRole))
            svg = str(index.data(previewmodel.ThumbnailSVGRole))

        desc_text = self.__template.format(description=description, name=name)

        self.__label.setText(desc_text)

        self.__path.setText(contractuser(path))

        if not svg:
            svg = NO_PREVIEW_SVG

        if svg:
            self.__image.load(QByteArray(svg.encode("utf-8")))
Пример #3
0
class PreviewBrowser(QWidget):
    """A Preview Browser for recent/premade scheme selection.
    """
    # Emitted when the current previewed item changes
    currentIndexChanged = Signal(int)

    # Emitted when an item is double clicked in the preview list.
    activated = Signal(int)

    def __init__(self, *args, heading="", previewMargins=12, **kwargs):
        super().__init__(*args)
        self.__model = None
        self.__currentIndex = -1
        self.__template = DESCRIPTION_TEMPLATE
        self.__margin = previewMargins
        self.__setupUi()
        self.setHeading(heading)

    def __setupUi(self):
        vlayout = QVBoxLayout()
        vlayout.setContentsMargins(0, 0, 0, 0)
        top_layout = QVBoxLayout(objectName="top-layout")
        margin = self.__margin
        top_layout.setContentsMargins(margin, margin, margin, margin)
        # Optional heading label

        self.__heading = QLabel(
            self, objectName="heading", visible=False
        )
        # Horizontal row with full text description and a large preview
        # image.
        hlayout = QHBoxLayout()
        hlayout.setContentsMargins(0, 0, 0, 0)
        self.__label = QLabel(
            self, objectName="description-label",
            wordWrap=True, alignment=Qt.AlignTop | Qt.AlignLeft
        )

        self.__label.setWordWrap(True)
        self.__label.setFixedSize(220, PREVIEW_SIZE[1])
        self.__label.setMinimumWidth(PREVIEW_SIZE[0] // 2)
        self.__label.setMaximumHeight(PREVIEW_SIZE[1])

        self.__image = QSvgWidget(self, objectName="preview-image")
        self.__image.setFixedSize(*PREVIEW_SIZE)

        self.__imageFrame = DropShadowFrame(self)
        self.__imageFrame.setWidget(self.__image)

        hlayout.addWidget(self.__label)
        hlayout.addWidget(self.__image)

        # Path text below the description and image
        path_layout = QHBoxLayout()
        path_layout.setContentsMargins(0, 0, 0, 0)
        path_label = QLabel("<b>{0!s}</b>".format(self.tr("Path:")), self,
                            objectName="path-label")
        self.__path = TextLabel(self, objectName="path-text")

        path_layout.addWidget(path_label)
        path_layout.addWidget(self.__path)

        top_layout.addWidget(self.__heading)
        top_layout.addLayout(hlayout)
        top_layout.addLayout(path_layout)

        vlayout.addLayout(top_layout)

        # An list view with small preview icons.
        self.__previewList = LinearIconView(
            objectName="preview-list-view",
            wordWrap=True
        )
        self.__previewList.doubleClicked.connect(self.__onDoubleClicked)

        vlayout.addWidget(self.__previewList)
        self.setLayout(vlayout)

    def setHeading(self, text):
        self.__heading.setVisible(bool(text))
        self.__heading.setText(text)

    def setPreviewMargins(self, margin):
        # type: (int) -> None
        """
        Set the left, top and right margins of the top widget part (heading
        and description)

        Parameters
        ----------
        margin : int
            Margin
        """
        if margin != self.__margin:
            layout = self.layout().itemAt(0).layout()
            assert isinstance(layout, QVBoxLayout)
            assert layout.objectName() == "top-layout"
            layout.setContentsMargins(margin, margin, margin, 0)

    def setModel(self, model):
        """Set the item model for preview.
        """
        if self.__model != model:
            if self.__model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.disconnect(self.__onSelectionChanged)
                self.__model.dataChanged.disconnect(self.__onDataChanged)

            self.__model = model
            self.__previewList.setModel(model)

            if model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.connect(self.__onSelectionChanged)
                self.__model.dataChanged.connect(self.__onDataChanged)

            if model and model.rowCount():
                self.setCurrentIndex(0)

    def model(self):
        """Return the item model.
        """
        return self.__model

    def setPreviewDelegate(self, delegate):
        """Set the delegate to render the preview images.
        """
        raise NotImplementedError

    def setDescriptionTemplate(self, template):
        self.__template = template
        self.__update()

    def setCurrentIndex(self, index):
        """Set the selected preview item index.
        """
        if self.__model is not None and self.__model.rowCount():
            index = min(index, self.__model.rowCount() - 1)
            index = self.__model.index(index, 0)
            sel_model = self.__previewList.selectionModel()
            # This emits selectionChanged signal and triggers
            # __onSelectionChanged, currentIndex is updated there.
            sel_model.select(index, sel_model.ClearAndSelect)

        elif self.__currentIndex != -1:
            self.__currentIndex = -1
            self.__update()
            self.currentIndexChanged.emit(-1)

    def currentIndex(self):
        """Return the current selected index.
        """
        return self.__currentIndex

    def __onSelectionChanged(self, *args):
        """Selected item in the preview list has changed.
        Set the new description and large preview image.

        """
        rows = self.__previewList.selectedIndexes()
        if rows:
            index = rows[0]
            self.__currentIndex = index.row()
        else:
            index = QModelIndex()
            self.__currentIndex = -1

        self.__update()
        self.currentIndexChanged.emit(self.__currentIndex)

    def __onDataChanged(self, topleft, bottomRight):
        """Data changed, update the preview if current index in the changed
        range.

        """
        if self.__currentIndex <= topleft.row() and \
                self.__currentIndex >= bottomRight.row():
            self.__update()

    def __onDoubleClicked(self, index):
        """Double click on an item in the preview item list.
        """
        self.activated.emit(index.row())

    def __update(self):
        """Update the current description.
        """
        if self.__currentIndex != -1:
            index = self.model().index(self.__currentIndex, 0)
        else:
            index = QModelIndex()

        if not index.isValid():
            description = ""
            name = ""
            path = ""
            svg = NO_PREVIEW_SVG
        else:
            description = index.data(Qt.WhatsThisRole)
            if description:
                description = description
            else:
                description = "No description."

            description = escape(description)
            description = description.replace("\n", "<br/>")

            name = index.data(Qt.DisplayRole)
            if name:
                name = name
            else:
                name = "Untitled"

            name = escape(name)
            path = str(index.data(Qt.StatusTipRole))
            svg = str(index.data(previewmodel.ThumbnailSVGRole))

        desc_text = self.__template.format(description=description, name=name)

        self.__label.setText(desc_text)

        self.__path.setText(contractuser(path))

        if not svg:
            svg = NO_PREVIEW_SVG

        if svg:
            self.__image.load(QByteArray(svg.encode("utf-8")))
Пример #4
0
class PreviewBrowser(QWidget):
    """A Preview Browser for recent/premade scheme selection.
    """
    # Emitted when the current previewed item changes
    currentIndexChanged = Signal(int)

    # Emitted when an item is double clicked in the preview list.
    activated = Signal(int)

    def __init__(self, *args):
        QWidget.__init__(self, *args)
        self.__model = None
        self.__currentIndex = -1
        self.__template = DESCRIPTION_TEMPLATE
        self.__setupUi()

    def __setupUi(self):
        vlayout = QVBoxLayout()
        vlayout.setContentsMargins(0, 0, 0, 0)
        top_layout = QHBoxLayout()
        top_layout.setContentsMargins(12, 12, 12, 12)

        # Top row with full text description and a large preview
        # image.
        self.__label = QLabel(self, objectName="description-label",
                              wordWrap=True,
                              alignment=Qt.AlignTop | Qt.AlignLeft)

        self.__label.setWordWrap(True)
        self.__label.setFixedSize(220, PREVIEW_SIZE[1])

        self.__image = QSvgWidget(self, objectName="preview-image")
        self.__image.setFixedSize(*PREVIEW_SIZE)

        self.__imageFrame = DropShadowFrame(self)
        self.__imageFrame.setWidget(self.__image)

        # Path text below the description and image
        path_layout = QHBoxLayout()
        path_layout.setContentsMargins(12, 0, 12, 0)
        path_label = QLabel("<b>{0!s}</b>".format(self.tr("Path:")), self,
                            objectName="path-label")

        self.__path = TextLabel(self, objectName="path-text")

        path_layout.addWidget(path_label)
        path_layout.addWidget(self.__path)

        self.__selectAction = \
            QAction(self.tr("Select"), self,
                    objectName="select-action",
                    )

        top_layout.addWidget(self.__label, 1,
                             alignment=Qt.AlignTop | Qt.AlignLeft)
        top_layout.addWidget(self.__image, 1,
                             alignment=Qt.AlignTop | Qt.AlignRight)

        vlayout.addLayout(top_layout)
        vlayout.addLayout(path_layout)

        # An list view with small preview icons.
        self.__previewList = LinearIconView(objectName="preview-list-view")
        self.__previewList.doubleClicked.connect(self.__onDoubleClicked)

        vlayout.addWidget(self.__previewList)
        self.setLayout(vlayout)

    def setModel(self, model):
        """Set the item model for preview.
        """
        if self.__model != model:
            if self.__model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.disconnect(self.__onSelectionChanged)
                self.__model.dataChanged.disconnect(self.__onDataChanged)

            self.__model = model
            self.__previewList.setModel(model)

            if model:
                s_model = self.__previewList.selectionModel()
                s_model.selectionChanged.connect(self.__onSelectionChanged)
                self.__model.dataChanged.connect(self.__onDataChanged)

            if model and model.rowCount():
                self.setCurrentIndex(0)

    def model(self):
        """Return the item model.
        """
        return self.__model

    def setPreviewDelegate(self, delegate):
        """Set the delegate to render the preview images.
        """
        raise NotImplementedError

    def setDescriptionTemplate(self, template):
        self.__template = template
        self.__update()

    def setCurrentIndex(self, index):
        """Set the selected preview item index.
        """
        if self.__model is not None and self.__model.rowCount():
            index = min(index, self.__model.rowCount() - 1)
            index = self.__model.index(index, 0)
            sel_model = self.__previewList.selectionModel()
            # This emits selectionChanged signal and triggers
            # __onSelectionChanged, currentIndex is updated there.
            sel_model.select(index, sel_model.ClearAndSelect)

        elif self.__currentIndex != -1:
            self.__currentIndex = -1
            self.__update()
            self.currentIndexChanged.emit(-1)

    def currentIndex(self):
        """Return the current selected index.
        """
        return self.__currentIndex

    def __onSelectionChanged(self, *args):
        """Selected item in the preview list has changed.
        Set the new description and large preview image.

        """
        rows = self.__previewList.selectedIndexes()
        if rows:
            index = rows[0]
            self.__currentIndex = index.row()
        else:
            index = QModelIndex()
            self.__currentIndex = -1

        self.__update()
        self.currentIndexChanged.emit(self.__currentIndex)

    def __onDataChanged(self, topleft, bottomRight):
        """Data changed, update the preview if current index in the changed
        range.

        """
        if self.__currentIndex <= topleft.row() and \
                self.__currentIndex >= bottomRight.row():
            self.__update()

    def __onDoubleClicked(self, index):
        """Double click on an item in the preview item list.
        """
        self.activated.emit(index.row())

    def __update(self):
        """Update the current description.
        """
        if self.__currentIndex != -1:
            index = self.model().index(self.__currentIndex, 0)
        else:
            index = QModelIndex()

        if not index.isValid():
            description = ""
            name = ""
            path = ""
            svg = NO_PREVIEW_SVG
        else:
            description = str(index.data(Qt.WhatsThisRole))
            if not description:
                description = "No description."

            description = escape(description)
            description = description.replace("\n", "<br/>")

            name = str(index.data(Qt.DisplayRole))
            if not name:
                name = "Untitled"

            name = escape(name)
            path = str(index.data(Qt.StatusTipRole))

            svg = str(index.data(previewmodel.ThumbnailSVGRole))

        desc_text = self.__template.format(description=description, name=name)

        self.__label.setText(desc_text)

        self.__path.setText(path)

        if not svg:
            svg = NO_PREVIEW_SVG

        if svg:
            self.__image.load(QByteArray(svg.encode("utf-8")))