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"""This script shows how to create a custom window around a PlotWidget.

It subclasses :class:`QMainWindow`, uses a :class:`~silx.gui.plot.PlotWidget`
as its central widget and adds toolbars and a colorbar by using pluggable widgets:

- :class:`~silx.gui.plot.PlotWidget` from :mod:`silx.gui.plot`
- QToolBar from :mod:`silx.gui.plot.tools`
- QAction from :mod:`silx.gui.plot.actions`
- QToolButton from :mod:`silx.gui.plot.PlotToolButtons`
- :class:`silx.gui.plot.ColorBar.ColorBarWidget`
"""

__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "06/05/2019"

import numpy

from silx.gui import qt

from silx.gui.plot import PlotWidget
from silx.gui.plot import tools  # QToolbars to use with PlotWidget
from silx.gui.plot import actions  # QAction to use with PlotWidget
from silx.gui.plot import PlotToolButtons  # QToolButton to use with PlotWidget
from silx.gui.plot.tools.RulerToolButton import RulerToolButton
from silx.gui.plot.ColorBar import ColorBarWidget
from silx.gui.plot.actions import control as control_actions


class MyPlotWindow(qt.QMainWindow):
    """QMainWindow with selected tools"""

    def __init__(self, parent=None):
        super(MyPlotWindow, self).__init__(parent)

        # Create a PlotWidget
        self._plot = PlotWidget(parent=self)

        # Create a colorbar linked with the PlotWidget
        colorBar = ColorBarWidget(parent=self, plot=self._plot)

        # Make ColorBarWidget background white by changing its palette
        colorBar.setAutoFillBackground(True)
        palette = colorBar.palette()
        palette.setColor(qt.QPalette.Window, qt.Qt.white)
        palette.setColor(qt.QPalette.Window, qt.Qt.white)
        colorBar.setPalette(palette)

        options = qt.QWidget(self)
        layout = qt.QVBoxLayout(options)
        button = qt.QPushButton("Show image", self)
        button.clicked.connect(self.showImage)
        layout.addWidget(button)
        button = qt.QPushButton("Show scatter", self)
        button.clicked.connect(self.showScatter)
        layout.addWidget(button)
        button = qt.QPushButton("Show delaunay", self)
        button.clicked.connect(self.showDelaunay)
        layout.addWidget(button)
        layout.addStretch()

        # Combine the ColorBarWidget and the PlotWidget as
        # this QMainWindow's central widget
        gridLayout = qt.QGridLayout()
        gridLayout.setSpacing(0)
        gridLayout.setContentsMargins(0, 0, 0, 0)
        gridLayout.addWidget(options, 0, 0)
        gridLayout.addWidget(self._plot, 0, 1)
        gridLayout.addWidget(colorBar, 0, 2)
        gridLayout.setRowStretch(0, 1)
        gridLayout.setColumnStretch(1, 1)
        centralWidget = qt.QWidget(self)
        centralWidget.setLayout(gridLayout)
        self.setCentralWidget(centralWidget)

        # Add ready to use toolbar with zoom and pan interaction mode buttons
        interactionToolBar = tools.InteractiveModeToolBar(parent=self, plot=self._plot)
        self.addToolBar(interactionToolBar)
        # Add toolbar actions to activate keyboard shortcuts
        self.addActions(interactionToolBar.actions())

        # Add a new toolbar
        toolBar = qt.QToolBar("Plot Tools", self)
        self.addToolBar(toolBar)

        # Add actions from silx.gui.plot.action to the toolbar
        resetZoomAction = actions.control.ResetZoomAction(parent=self, plot=self._plot)
        toolBar.addAction(resetZoomAction)

        # Add tool buttons from silx.gui.plot.PlotToolButtons
        aspectRatioButton = PlotToolButtons.AspectToolButton(
            parent=self, plot=self._plot
        )
        toolBar.addWidget(aspectRatioButton)

        # Add tool buttons from silx.gui.plot.PlotToolButtons
        rulerButton = RulerToolButton(
            parent=self, plot=self._plot
        )
        toolBar.addWidget(rulerButton)

        action = control_actions.OpenGLAction(parent=toolBar, plot=self._plot)
        toolBar.addAction(action)

        # Add ready to use toolbar with copy, save and print buttons
        outputToolBar = tools.OutputToolBar(parent=self, plot=self._plot)
        self.addToolBar(outputToolBar)
        # Add toolbar actions to activate keyboard shortcuts
        self.addActions(outputToolBar.actions())

        # Add limits tool bar from silx.gui.plot.PlotTools
        limitsToolBar = tools.LimitsToolBar(parent=self, plot=self._plot)
        self.addToolBar(qt.Qt.BottomToolBarArea, limitsToolBar)

    def getPlotWidget(self):
        """Returns the PlotWidget contains in this window"""
        return self._plot

    def showImage(self):
        plot = self.getPlotWidget()
        plot.clear()
        plot.getDefaultColormap().setName("viridis")

        # Add an image to the plot
        x = numpy.outer(numpy.linspace(-10, 10, 200), numpy.linspace(-10, 5, 150))
        image = numpy.sin(x) / x
        plot.addImage(image)
        plot.resetZoom()

    def showScatter(self):
        plot = self.getPlotWidget()
        plot.clear()
        plot.getDefaultColormap().setName("viridis")

        nbPoints = 50
        x = numpy.random.rand(nbPoints)
        y = numpy.random.rand(nbPoints)
        value = numpy.random.rand(nbPoints)
        plot.addScatter(x=x, y=y, value=value)
        plot.resetZoom()

    def showDelaunay(self):
        plot = self.getPlotWidget()
        plot.clear()
        plot.getDefaultColormap().setName("viridis")

        nbPoints = 50
        x = numpy.random.rand(nbPoints)
        y = numpy.random.rand(nbPoints)
        value = numpy.random.rand(nbPoints)
        scatter = plot.addScatter(x=x, y=y, value=value)
        scatter.setVisualization("solid")
        plot.resetZoom()


def main():
    global app
    app = qt.QApplication([])

    # Create the ad hoc window containing a PlotWidget and associated tools
    window = MyPlotWindow()
    window.setAttribute(qt.Qt.WA_DeleteOnClose)
    window.show()
    window.showImage()
    app.exec()


if __name__ == "__main__":
    main()