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448 lines
12 KiB
448 lines
12 KiB
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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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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font (15.0f),
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justification (Justification::centredLeft),
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horizontalBorderSize (5),
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verticalBorderSize (1),
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minimumHorizontalScale (0.7f),
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editSingleClick (false),
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editDoubleClick (false),
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lossOfFocusDiscardsChanges (false)
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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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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 = nullptr;
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}
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//==============================================================================
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void Label::setText (const String& newText,
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const 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 (const 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 (const bool editOnSingleClick,
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const bool editOnDoubleClick,
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const bool lossOfFocusDiscardsChanges_)
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{
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editSingleClick = editOnSingleClick;
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editDoubleClick = editOnDoubleClick;
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lossOfFocusDiscardsChanges = lossOfFocusDiscardsChanges_;
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setWantsKeyboardFocus (editOnSingleClick || editOnDoubleClick);
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setFocusContainer (editOnSingleClick || editOnDoubleClick);
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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 (int h, int v)
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{
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if (horizontalBorderSize != h || verticalBorderSize != v)
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{
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horizontalBorderSize = h;
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verticalBorderSize = v;
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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 static_cast<Component*> (ownerComponent);
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}
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void Label::attachToComponent (Component* owner, const bool onLeft)
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{
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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 (owner->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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const Font f (getLookAndFeel().getLabelFont (*this));
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if (leftOfOwnerComp)
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{
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setSize (jmin (f.getStringWidth (textValue.toString()) + 8, component.getX()),
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component.getHeight());
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setTopRightPosition (component.getX(), component.getY());
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}
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else
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{
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setSize (component.getWidth(),
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8 + roundToInt (f.getHeight()));
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setTopLeftPosition (component.getX(), component.getY() - getHeight());
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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 (Component* 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*) {}
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void Label::editorAboutToBeHidden (TextEditor*)
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{
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if (ComponentPeer* const peer = getPeer())
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peer->dismissPendingTextInput();
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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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addAndMakeVisible (editor = createEditorComponent());
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editor->setText (getText(), false);
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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);
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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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const String 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 (const 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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ScopedPointer<TextEditor> outgoingEditor (editor);
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editorAboutToBeHidden (outgoingEditor);
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const bool changed = (! discardCurrentEditorContents)
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&& updateFromTextEditorContents (*outgoingEditor);
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outgoingEditor = 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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TextEditor* Label::createEditorComponent()
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{
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TextEditor* const ed = new TextEditor (getName());
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ed->applyFontToAllText (getLookAndFeel().getLabelFont (*this));
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copyAllExplicitColoursTo (*ed);
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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;
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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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&& e.mouseWasClicked()
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&& contains (e.getPosition())
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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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void Label::mouseDoubleClick (const MouseEvent& e)
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{
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if (editDoubleClick && ! e.mods.isPopupMenu())
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showEditor();
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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->setBoundsInset (BorderSize<int> (0));
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}
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void Label::focusGained (FocusChangeType cause)
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{
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if (editSingleClick && cause == focusChangedByTabKey)
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showEditor();
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}
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void Label::enablementChanged()
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{
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repaint();
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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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void Label::setMinimumHorizontalScale (const float newScale)
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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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repaint();
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}
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}
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//==============================================================================
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// We'll use a custom focus traverser here to make sure focus goes from the
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// text editor to another component rather than back to the label itself.
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class LabelKeyboardFocusTraverser : public KeyboardFocusTraverser
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{
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public:
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LabelKeyboardFocusTraverser() {}
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Component* getNextComponent (Component* c) { return KeyboardFocusTraverser::getNextComponent (getComp (c)); }
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Component* getPreviousComponent (Component* c) { return KeyboardFocusTraverser::getPreviousComponent (getComp (c)); }
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static Component* getComp (Component* current)
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{
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return dynamic_cast <TextEditor*> (current) != nullptr
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? current->getParentComponent() : current;
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}
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};
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KeyboardFocusTraverser* Label::createFocusTraverser()
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{
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return new LabelKeyboardFocusTraverser();
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}
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//==============================================================================
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void Label::addListener (LabelListener* const listener)
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{
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listeners.add (listener);
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}
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void Label::removeListener (LabelListener* const listener)
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{
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listeners.remove (listener);
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}
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void Label::callChangeListeners()
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{
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Component::BailOutChecker checker (this);
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listeners.callChecked (checker, &LabelListener::labelTextChanged, this); // (can't use Label::Listener due to idiotic VC2005 bug)
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}
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//==============================================================================
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void Label::textEditorTextChanged (TextEditor& ed)
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{
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if (editor != nullptr)
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{
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jassert (&ed == editor);
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if (! (hasKeyboardFocus (true) || isCurrentlyBlockedByAnotherModalComponent()))
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{
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if (lossOfFocusDiscardsChanges)
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textEditorEscapeKeyPressed (ed);
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else
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textEditorReturnKeyPressed (ed);
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}
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}
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}
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void Label::textEditorReturnKeyPressed (TextEditor& ed)
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{
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if (editor != nullptr)
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{
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jassert (&ed == editor);
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const bool changed = updateFromTextEditorContents (ed);
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hideEditor (true);
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if (changed)
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{
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WeakReference<Component> deletionChecker (this);
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textWasEdited();
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if (deletionChecker != nullptr)
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callChangeListeners();
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}
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}
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}
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void Label::textEditorEscapeKeyPressed (TextEditor& ed)
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{
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if (editor != nullptr)
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{
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jassert (&ed == editor);
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(void) ed;
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editor->setText (textValue.toString(), false);
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hideEditor (true);
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}
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}
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void Label::textEditorFocusLost (TextEditor& ed)
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{
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textEditorTextChanged (ed);
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}
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