Carla/source/modules/juce_gui_basics/filebrowser/juce_FileChooserDialogBox.cpp

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

class FileChooserDialogBox::ContentComponent  : public Component
{
public:
    ContentComponent (const String& name, const String& desc, FileBrowserComponent& chooser)
        : Component (name),
          chooserComponent (chooser),
          okButton (chooser.getActionVerb()),
          cancelButton (TRANS ("Cancel")),
          newFolderButton (TRANS ("New Folder")),
          instructions (desc)
    {
        addAndMakeVisible (chooserComponent);

        addAndMakeVisible (okButton);
        okButton.addShortcut (KeyPress (KeyPress::returnKey));

        addAndMakeVisible (cancelButton);
        cancelButton.addShortcut (KeyPress (KeyPress::escapeKey));

        addChildComponent (newFolderButton);

        setInterceptsMouseClicks (false, true);
    }

    void paint (Graphics& g) override
    {
        text.draw (g, getLocalBounds().reduced (6)
                        .removeFromTop ((int) text.getHeight()).toFloat());
    }

    void resized() override
    {
        const int buttonHeight = 26;

        auto area = getLocalBounds();

        text.createLayout (getLookAndFeel().createFileChooserHeaderText (getName(), instructions),
                           getWidth() - 12.0f);

        area.removeFromTop (roundToInt (text.getHeight()) + 10);

        chooserComponent.setBounds (area.removeFromTop (area.getHeight() - buttonHeight - 20));
        auto buttonArea = area.reduced (16, 10);

        okButton.changeWidthToFitText (buttonHeight);
        okButton.setBounds (buttonArea.removeFromRight (okButton.getWidth() + 16));

        buttonArea.removeFromRight (16);

        cancelButton.changeWidthToFitText (buttonHeight);
        cancelButton.setBounds (buttonArea.removeFromRight (cancelButton.getWidth()));

        newFolderButton.changeWidthToFitText (buttonHeight);
        newFolderButton.setBounds (buttonArea.removeFromLeft (newFolderButton.getWidth()));
    }

    FileBrowserComponent& chooserComponent;
    TextButton okButton, cancelButton, newFolderButton;
    String instructions;
    TextLayout text;
};

//==============================================================================
FileChooserDialogBox::FileChooserDialogBox (const String& name,
                                            const String& instructions,
                                            FileBrowserComponent& chooserComponent,
                                            bool shouldWarn,
                                            Colour backgroundColour,
                                            Component* parentComp)
    : ResizableWindow (name, backgroundColour, parentComp == nullptr),
      warnAboutOverwritingExistingFiles (shouldWarn)
{
    content = new ContentComponent (name, instructions, chooserComponent);
    setContentOwned (content, false);

    setResizable (true, true);
    setResizeLimits (300, 300, 1200, 1000);

    content->okButton.onClick        = [this] { okButtonPressed(); };
    content->cancelButton.onClick    = [this] { closeButtonPressed(); };
    content->newFolderButton.onClick = [this] { createNewFolder(); };

    content->chooserComponent.addListener (this);

    FileChooserDialogBox::selectionChanged();

    if (parentComp != nullptr)
        parentComp->addAndMakeVisible (this);
}

FileChooserDialogBox::~FileChooserDialogBox()
{
    content->chooserComponent.removeListener (this);
}

//==============================================================================
#if JUCE_MODAL_LOOPS_PERMITTED
bool FileChooserDialogBox::show (int w, int h)
{
    return showAt (-1, -1, w, h);
}

bool FileChooserDialogBox::showAt (int x, int y, int w, int h)
{
    if (w <= 0)  w = getDefaultWidth();
    if (h <= 0)  h = 500;

    if (x < 0 || y < 0)
        centreWithSize (w, h);
    else
        setBounds (x, y, w, h);

    const bool ok = (runModalLoop() != 0);
    setVisible (false);
    return ok;
}
#endif

void FileChooserDialogBox::centreWithDefaultSize (Component* componentToCentreAround)
{
    centreAroundComponent (componentToCentreAround, getDefaultWidth(), 500);
}

int FileChooserDialogBox::getDefaultWidth() const
{
    if (auto* previewComp = content->chooserComponent.getPreviewComponent())
        return 400 + previewComp->getWidth();

    return 600;
}

//==============================================================================
void FileChooserDialogBox::closeButtonPressed()
{
    setVisible (false);
}

void FileChooserDialogBox::selectionChanged()
{
    content->okButton.setEnabled (content->chooserComponent.currentFileIsValid());

    content->newFolderButton.setVisible (content->chooserComponent.isSaveMode()
                                          && content->chooserComponent.getRoot().isDirectory());
}

void FileChooserDialogBox::fileDoubleClicked (const File&)
{
    selectionChanged();
    content->okButton.triggerClick();
}

void FileChooserDialogBox::fileClicked (const File&, const MouseEvent&) {}
void FileChooserDialogBox::browserRootChanged (const File&) {}

void FileChooserDialogBox::okToOverwriteFileCallback (int result, FileChooserDialogBox* box)
{
    if (result != 0 && box != nullptr)
        box->exitModalState (1);
}

void FileChooserDialogBox::okButtonPressed()
{
    if (warnAboutOverwritingExistingFiles
         && content->chooserComponent.isSaveMode()
         && content->chooserComponent.getSelectedFile(0).exists())
    {
        AlertWindow::showOkCancelBox (AlertWindow::WarningIcon,
                                      TRANS("File already exists"),
                                      TRANS("There's already a file called: FLNM")
                                         .replace ("FLNM", content->chooserComponent.getSelectedFile(0).getFullPathName())
                                        + "\n\n"
                                        + TRANS("Are you sure you want to overwrite it?"),
                                      TRANS("Overwrite"),
                                      TRANS("Cancel"),
                                      this,
                                      ModalCallbackFunction::forComponent (okToOverwriteFileCallback, this));
    }
    else
    {
        exitModalState (1);
    }
}

void FileChooserDialogBox::createNewFolderCallback (int result, FileChooserDialogBox* box,
                                                    Component::SafePointer<AlertWindow> alert)
{
    if (result != 0 && alert != nullptr && box != nullptr)
    {
        alert->setVisible (false);
        box->createNewFolderConfirmed (alert->getTextEditorContents ("Folder Name"));
    }
}

void FileChooserDialogBox::createNewFolder()
{
    auto parent = content->chooserComponent.getRoot();

    if (parent.isDirectory())
    {
        auto* aw = new AlertWindow (TRANS("New Folder"),
                                    TRANS("Please enter the name for the folder"),
                                    AlertWindow::NoIcon, this);

        aw->addTextEditor ("Folder Name", String(), String(), false);
        aw->addButton (TRANS("Create Folder"), 1, KeyPress (KeyPress::returnKey));
        aw->addButton (TRANS("Cancel"),        0, KeyPress (KeyPress::escapeKey));

        aw->enterModalState (true,
                             ModalCallbackFunction::forComponent (createNewFolderCallback, this,
                                                                  Component::SafePointer<AlertWindow> (aw)),
                             true);
    }
}

void FileChooserDialogBox::createNewFolderConfirmed (const String& nameFromDialog)
{
    auto name = File::createLegalFileName (nameFromDialog);

    if (! name.isEmpty())
    {
        auto parent = content->chooserComponent.getRoot();

        if (! parent.getChildFile (name).createDirectory())
            AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon,
                                              TRANS ("New Folder"),
                                              TRANS ("Couldn't create the folder!"));

        content->chooserComponent.refresh();
    }
}

} // namespace juce