584 lines
16 KiB
C++
584 lines
16 KiB
C++
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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Label::Label (const String& name, const String& labelText)
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: Component (name),
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textValue (labelText),
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lastTextValue (labelText)
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{
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setColour (TextEditor::textColourId, Colours::black);
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setColour (TextEditor::backgroundColourId, Colours::transparentBlack);
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setColour (TextEditor::outlineColourId, Colours::transparentBlack);
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setInterceptsMouseClicks(editSingleClick || editDoubleClick, editSingleClick || editDoubleClick);
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textValue.addListener (this);
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}
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Label::~Label()
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{
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textValue.removeListener (this);
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if (ownerComponent != nullptr)
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ownerComponent->removeComponentListener (this);
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editor.reset();
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}
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//==============================================================================
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void Label::setText (const String& newText, NotificationType notification)
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{
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hideEditor (true);
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if (lastTextValue != newText)
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{
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lastTextValue = newText;
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textValue = newText;
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repaint();
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textWasChanged();
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if (ownerComponent != nullptr)
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componentMovedOrResized (*ownerComponent, true, true);
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if (notification != dontSendNotification)
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callChangeListeners();
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}
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}
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String Label::getText (bool returnActiveEditorContents) const
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{
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return (returnActiveEditorContents && isBeingEdited())
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? editor->getText()
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: textValue.toString();
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}
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void Label::valueChanged (Value&)
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{
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if (lastTextValue != textValue.toString())
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setText (textValue.toString(), sendNotification);
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}
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//==============================================================================
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void Label::setFont (const Font& newFont)
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{
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if (font != newFont)
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{
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font = newFont;
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repaint();
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}
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}
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Font Label::getFont() const noexcept
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{
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return font;
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}
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void Label::setEditable (bool editOnSingleClick,
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bool editOnDoubleClick,
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bool lossOfFocusDiscards)
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{
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editSingleClick = editOnSingleClick;
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editDoubleClick = editOnDoubleClick;
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lossOfFocusDiscardsChanges = lossOfFocusDiscards;
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const auto isKeybordFocusable = (editOnSingleClick || editOnDoubleClick);
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setWantsKeyboardFocus (isKeybordFocusable);
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setFocusContainerType (isKeybordFocusable ? FocusContainerType::keyboardFocusContainer
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: FocusContainerType::none);
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setInterceptsMouseClicks(isKeybordFocusable, isKeybordFocusable);
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invalidateAccessibilityHandler();
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}
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void Label::setJustificationType (Justification newJustification)
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{
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if (justification != newJustification)
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{
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justification = newJustification;
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repaint();
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}
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}
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void Label::setBorderSize (BorderSize<int> newBorder)
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{
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if (border != newBorder)
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{
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border = newBorder;
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repaint();
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}
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}
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//==============================================================================
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Component* Label::getAttachedComponent() const
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{
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return ownerComponent.get();
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}
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void Label::attachToComponent (Component* owner, bool onLeft)
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{
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jassert (owner != this); // Not a great idea to try to attach it to itself!
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if (ownerComponent != nullptr)
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ownerComponent->removeComponentListener (this);
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ownerComponent = owner;
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leftOfOwnerComp = onLeft;
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if (ownerComponent != nullptr)
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{
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setVisible (ownerComponent->isVisible());
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ownerComponent->addComponentListener (this);
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componentParentHierarchyChanged (*ownerComponent);
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componentMovedOrResized (*ownerComponent, true, true);
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}
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}
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void Label::componentMovedOrResized (Component& component, bool /*wasMoved*/, bool /*wasResized*/)
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{
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auto& lf = getLookAndFeel();
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auto f = lf.getLabelFont (*this);
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auto borderSize = lf.getLabelBorderSize (*this);
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if (leftOfOwnerComp)
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{
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auto width = jmin (roundToInt (f.getStringWidthFloat (textValue.toString()) + 0.5f)
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+ borderSize.getLeftAndRight(),
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component.getX());
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setBounds (component.getX() - width, component.getY(), width, component.getHeight());
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}
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else
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{
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auto height = borderSize.getTopAndBottom() + 6 + roundToInt (f.getHeight() + 0.5f);
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setBounds (component.getX(), component.getY() - height, component.getWidth(), height);
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}
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}
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void Label::componentParentHierarchyChanged (Component& component)
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{
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if (auto* parent = component.getParentComponent())
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parent->addChildComponent (this);
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}
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void Label::componentVisibilityChanged (Component& component)
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{
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setVisible (component.isVisible());
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}
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//==============================================================================
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void Label::textWasEdited() {}
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void Label::textWasChanged() {}
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void Label::editorShown (TextEditor* textEditor)
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{
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Component::BailOutChecker checker (this);
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listeners.callChecked (checker, [this, textEditor] (Label::Listener& l) { l.editorShown (this, *textEditor); });
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if (checker.shouldBailOut())
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return;
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if (onEditorShow != nullptr)
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onEditorShow();
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}
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void Label::editorAboutToBeHidden (TextEditor* textEditor)
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{
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if (auto* peer = getPeer())
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peer->dismissPendingTextInput();
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Component::BailOutChecker checker (this);
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listeners.callChecked (checker, [this, textEditor] (Label::Listener& l) { l.editorHidden (this, *textEditor); });
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if (checker.shouldBailOut())
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return;
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if (onEditorHide != nullptr)
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onEditorHide();
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}
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void Label::showEditor()
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{
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if (editor == nullptr)
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{
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editor.reset (createEditorComponent());
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editor->setSize (10, 10);
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addAndMakeVisible (editor.get());
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editor->setText (getText(), false);
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editor->setKeyboardType (keyboardType);
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editor->addListener (this);
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editor->grabKeyboardFocus();
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if (editor == nullptr) // may be deleted by a callback
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return;
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editor->setHighlightedRegion (Range<int> (0, textValue.toString().length()));
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resized();
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repaint();
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editorShown (editor.get());
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enterModalState (false);
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editor->grabKeyboardFocus();
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}
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}
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bool Label::updateFromTextEditorContents (TextEditor& ed)
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{
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auto newText = ed.getText();
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if (textValue.toString() != newText)
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{
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lastTextValue = newText;
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textValue = newText;
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repaint();
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textWasChanged();
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if (ownerComponent != nullptr)
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componentMovedOrResized (*ownerComponent, true, true);
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return true;
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}
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return false;
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}
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void Label::hideEditor (bool discardCurrentEditorContents)
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{
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if (editor != nullptr)
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{
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WeakReference<Component> deletionChecker (this);
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std::unique_ptr<TextEditor> outgoingEditor;
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std::swap (outgoingEditor, editor);
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editorAboutToBeHidden (outgoingEditor.get());
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const bool changed = (! discardCurrentEditorContents)
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&& updateFromTextEditorContents (*outgoingEditor);
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outgoingEditor.reset();
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if (deletionChecker != nullptr)
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repaint();
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if (changed)
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textWasEdited();
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if (deletionChecker != nullptr)
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exitModalState (0);
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if (changed && deletionChecker != nullptr)
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callChangeListeners();
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}
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}
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void Label::inputAttemptWhenModal()
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{
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if (editor != nullptr)
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{
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if (lossOfFocusDiscardsChanges)
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textEditorEscapeKeyPressed (*editor);
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else
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textEditorReturnKeyPressed (*editor);
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}
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}
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bool Label::isBeingEdited() const noexcept
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{
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return editor != nullptr;
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}
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static void copyColourIfSpecified (Label& l, TextEditor& ed, int colourID, int targetColourID)
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{
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if (l.isColourSpecified (colourID) || l.getLookAndFeel().isColourSpecified (colourID))
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ed.setColour (targetColourID, l.findColour (colourID));
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}
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TextEditor* Label::createEditorComponent()
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{
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auto* ed = new TextEditor (getName());
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ed->applyFontToAllText (getLookAndFeel().getLabelFont (*this));
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copyAllExplicitColoursTo (*ed);
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copyColourIfSpecified (*this, *ed, textWhenEditingColourId, TextEditor::textColourId);
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copyColourIfSpecified (*this, *ed, backgroundWhenEditingColourId, TextEditor::backgroundColourId);
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copyColourIfSpecified (*this, *ed, outlineWhenEditingColourId, TextEditor::focusedOutlineColourId);
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return ed;
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}
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TextEditor* Label::getCurrentTextEditor() const noexcept
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{
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return editor.get();
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}
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//==============================================================================
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void Label::paint (Graphics& g)
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{
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getLookAndFeel().drawLabel (g, *this);
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}
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void Label::mouseUp (const MouseEvent& e)
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{
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if (editSingleClick
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&& isEnabled()
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&& contains (e.getPosition())
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&& ! (e.mouseWasDraggedSinceMouseDown() || e.mods.isPopupMenu()))
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{
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showEditor();
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}
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}
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void Label::mouseDoubleClick (const MouseEvent& e)
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{
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if (editDoubleClick
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&& isEnabled()
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&& ! e.mods.isPopupMenu())
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{
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showEditor();
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}
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}
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||
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void Label::resized()
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{
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if (editor != nullptr)
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editor->setBounds (getLocalBounds());
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}
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||
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||
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void Label::focusGained (FocusChangeType cause)
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{
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if (editSingleClick
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&& isEnabled()
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&& cause == focusChangedByTabKey)
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{
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showEditor();
|
||
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}
|
||
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}
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||
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void Label::enablementChanged()
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{
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||
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repaint();
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||
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}
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||
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||
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void Label::colourChanged()
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{
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repaint();
|
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}
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|
||
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void Label::setMinimumHorizontalScale (const float newScale)
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||
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{
|
||
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if (minimumHorizontalScale != newScale)
|
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{
|
||
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minimumHorizontalScale = newScale;
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||
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repaint();
|
||
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}
|
||
|
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}
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
// We'll use a custom focus traverser here to make sure focus goes from the
|
||
|
|
// text editor to another component rather than back to the label itself.
|
||
|
|
class LabelKeyboardFocusTraverser : public KeyboardFocusTraverser
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
explicit LabelKeyboardFocusTraverser (Label& l) : owner (l) {}
|
||
|
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|
||
|
|
Component* getDefaultComponent (Component* parent) override
|
||
|
|
{
|
||
|
|
auto getContainer = [&]
|
||
|
|
{
|
||
|
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if (owner.getCurrentTextEditor() != nullptr && parent == &owner)
|
||
|
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return owner.findKeyboardFocusContainer();
|
||
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|
||
|
|
return parent;
|
||
|
|
};
|
||
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|
|
||
|
|
if (auto* container = getContainer())
|
||
|
|
return KeyboardFocusTraverser::getDefaultComponent (container);
|
||
|
|
|
||
|
|
return nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
Component* getNextComponent (Component* c) override { return KeyboardFocusTraverser::getNextComponent (getComp (c)); }
|
||
|
|
Component* getPreviousComponent (Component* c) override { return KeyboardFocusTraverser::getPreviousComponent (getComp (c)); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
Component* getComp (Component* current) const
|
||
|
|
{
|
||
|
|
if (auto* ed = owner.getCurrentTextEditor())
|
||
|
|
if (current == ed)
|
||
|
|
return current->getParentComponent();
|
||
|
|
|
||
|
|
return current;
|
||
|
|
}
|
||
|
|
|
||
|
|
Label& owner;
|
||
|
|
|
||
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LabelKeyboardFocusTraverser)
|
||
|
|
};
|
||
|
|
|
||
|
|
std::unique_ptr<ComponentTraverser> Label::createKeyboardFocusTraverser()
|
||
|
|
{
|
||
|
|
return std::make_unique<LabelKeyboardFocusTraverser> (*this);
|
||
|
|
}
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
void Label::addListener (Label::Listener* l) { listeners.add (l); }
|
||
|
|
void Label::removeListener (Label::Listener* l) { listeners.remove (l); }
|
||
|
|
|
||
|
|
void Label::callChangeListeners()
|
||
|
|
{
|
||
|
|
Component::BailOutChecker checker (this);
|
||
|
|
listeners.callChecked (checker, [this] (Listener& l) { l.labelTextChanged (this); });
|
||
|
|
|
||
|
|
if (checker.shouldBailOut())
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (onTextChange != nullptr)
|
||
|
|
onTextChange();
|
||
|
|
}
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
void Label::textEditorTextChanged (TextEditor& ed)
|
||
|
|
{
|
||
|
|
if (editor != nullptr)
|
||
|
|
{
|
||
|
|
jassert (&ed == editor.get());
|
||
|
|
|
||
|
|
if (! (hasKeyboardFocus (true) || isCurrentlyBlockedByAnotherModalComponent()))
|
||
|
|
{
|
||
|
|
if (lossOfFocusDiscardsChanges)
|
||
|
|
textEditorEscapeKeyPressed (ed);
|
||
|
|
else
|
||
|
|
textEditorReturnKeyPressed (ed);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void Label::textEditorReturnKeyPressed (TextEditor& ed)
|
||
|
|
{
|
||
|
|
if (editor != nullptr)
|
||
|
|
{
|
||
|
|
jassert (&ed == editor.get());
|
||
|
|
|
||
|
|
WeakReference<Component> deletionChecker (this);
|
||
|
|
bool changed = updateFromTextEditorContents (ed);
|
||
|
|
hideEditor (true);
|
||
|
|
|
||
|
|
if (changed && deletionChecker != nullptr)
|
||
|
|
{
|
||
|
|
textWasEdited();
|
||
|
|
|
||
|
|
if (deletionChecker != nullptr)
|
||
|
|
callChangeListeners();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void Label::textEditorEscapeKeyPressed (TextEditor& ed)
|
||
|
|
{
|
||
|
|
if (editor != nullptr)
|
||
|
|
{
|
||
|
|
jassertquiet (&ed == editor.get());
|
||
|
|
|
||
|
|
editor->setText (textValue.toString(), false);
|
||
|
|
hideEditor (true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void Label::textEditorFocusLost (TextEditor& ed)
|
||
|
|
{
|
||
|
|
textEditorTextChanged (ed);
|
||
|
|
}
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
class LabelAccessibilityHandler : public AccessibilityHandler
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
explicit LabelAccessibilityHandler (Label& labelToWrap)
|
||
|
|
: AccessibilityHandler (labelToWrap,
|
||
|
|
labelToWrap.isEditable() ? AccessibilityRole::editableText : AccessibilityRole::label,
|
||
|
|
getAccessibilityActions (labelToWrap),
|
||
|
|
{ std::make_unique<LabelValueInterface> (labelToWrap) }),
|
||
|
|
label (labelToWrap)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
String getTitle() const override { return label.getText(); }
|
||
|
|
String getHelp() const override { return label.getTooltip(); }
|
||
|
|
|
||
|
|
AccessibleState getCurrentState() const override
|
||
|
|
{
|
||
|
|
if (label.isBeingEdited())
|
||
|
|
return {}; // allow focus to pass through to the TextEditor
|
||
|
|
|
||
|
|
return AccessibilityHandler::getCurrentState();
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
class LabelValueInterface : public AccessibilityTextValueInterface
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
explicit LabelValueInterface (Label& labelToWrap)
|
||
|
|
: label (labelToWrap)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool isReadOnly() const override { return true; }
|
||
|
|
String getCurrentValueAsString() const override { return label.getText(); }
|
||
|
|
void setValueAsString (const String&) override {}
|
||
|
|
|
||
|
|
private:
|
||
|
|
Label& label;
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LabelValueInterface)
|
||
|
|
};
|
||
|
|
|
||
|
|
static AccessibilityActions getAccessibilityActions (Label& label)
|
||
|
|
{
|
||
|
|
if (label.isEditable())
|
||
|
|
return AccessibilityActions().addAction (AccessibilityActionType::press, [&label] { label.showEditor(); });
|
||
|
|
|
||
|
|
return {};
|
||
|
|
}
|
||
|
|
|
||
|
|
Label& label;
|
||
|
|
|
||
|
|
//==============================================================================
|
||
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LabelAccessibilityHandler)
|
||
|
|
};
|
||
|
|
|
||
|
|
std::unique_ptr<AccessibilityHandler> Label::createAccessibilityHandler()
|
||
|
|
{
|
||
|
|
return std::make_unique<LabelAccessibilityHandler> (*this);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace juce
|