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738 lines
30 KiB
738 lines
30 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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#ifndef JUCE_TEXTEDITOR_H_INCLUDED
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#define JUCE_TEXTEDITOR_H_INCLUDED
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//==============================================================================
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/**
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An editable text box.
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A TextEditor can either be in single- or multi-line mode, and supports mixed
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fonts and colours.
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@see TextEditor::Listener, Label
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*/
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class JUCE_API TextEditor : public Component,
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public TextInputTarget,
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public SettableTooltipClient
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{
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public:
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//==============================================================================
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/** Creates a new, empty text editor.
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@param componentName the name to pass to the component for it to use as its name
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@param passwordCharacter if this is not zero, this character will be used as a replacement
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for all characters that are drawn on screen - e.g. to create
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a password-style textbox containing circular blobs instead of text,
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you could set this value to 0x25cf, which is the unicode character
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for a black splodge (not all fonts include this, though), or 0x2022,
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which is a bullet (probably the best choice for linux).
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*/
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explicit TextEditor (const String& componentName = String::empty,
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juce_wchar passwordCharacter = 0);
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/** Destructor. */
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~TextEditor();
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//==============================================================================
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/** Puts the editor into either multi- or single-line mode.
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By default, the editor will be in single-line mode, so use this if you need a multi-line
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editor.
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See also the setReturnKeyStartsNewLine() method, which will also need to be turned
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on if you want a multi-line editor with line-breaks.
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@see isMultiLine, setReturnKeyStartsNewLine
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*/
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void setMultiLine (bool shouldBeMultiLine,
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bool shouldWordWrap = true);
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/** Returns true if the editor is in multi-line mode. */
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bool isMultiLine() const;
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//==============================================================================
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/** Changes the behaviour of the return key.
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If set to true, the return key will insert a new-line into the text; if false
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it will trigger a call to the TextEditor::Listener::textEditorReturnKeyPressed()
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method. By default this is set to false, and when true it will only insert
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new-lines when in multi-line mode (see setMultiLine()).
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*/
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void setReturnKeyStartsNewLine (bool shouldStartNewLine);
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/** Returns the value set by setReturnKeyStartsNewLine().
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See setReturnKeyStartsNewLine() for more info.
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*/
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bool getReturnKeyStartsNewLine() const { return returnKeyStartsNewLine; }
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/** Indicates whether the tab key should be accepted and used to input a tab character,
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or whether it gets ignored.
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By default the tab key is ignored, so that it can be used to switch keyboard focus
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between components.
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*/
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void setTabKeyUsedAsCharacter (bool shouldTabKeyBeUsed);
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/** Returns true if the tab key is being used for input.
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@see setTabKeyUsedAsCharacter
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*/
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bool isTabKeyUsedAsCharacter() const { return tabKeyUsed; }
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/** This can be used to change whether escape and return keypress events are
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propagated up to the parent component.
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The default here is true, meaning that these events are not allowed to reach the
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parent, but you may want to allow them through so that they can trigger other
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actions, e.g. closing a dialog box, etc.
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*/
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void setEscapeAndReturnKeysConsumed (bool shouldBeConsumed) noexcept;
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//==============================================================================
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/** Changes the editor to read-only mode.
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By default, the text editor is not read-only. If you're making it read-only, you
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might also want to call setCaretVisible (false) to get rid of the caret.
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The text can still be highlighted and copied when in read-only mode.
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@see isReadOnly, setCaretVisible
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*/
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void setReadOnly (bool shouldBeReadOnly);
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/** Returns true if the editor is in read-only mode. */
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bool isReadOnly() const;
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//==============================================================================
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/** Makes the caret visible or invisible.
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By default the caret is visible.
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@see setCaretColour, setCaretPosition
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*/
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void setCaretVisible (bool shouldBeVisible);
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/** Returns true if the caret is enabled.
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@see setCaretVisible
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*/
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bool isCaretVisible() const noexcept { return caret != nullptr; }
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//==============================================================================
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/** Enables/disables a vertical scrollbar.
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(This only applies when in multi-line mode). When the text gets too long to fit
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in the component, a scrollbar can appear to allow it to be scrolled. Even when
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this is enabled, the scrollbar will be hidden unless it's needed.
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By default the scrollbar is enabled.
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*/
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void setScrollbarsShown (bool shouldBeEnabled);
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/** Returns true if scrollbars are enabled.
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@see setScrollbarsShown
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*/
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bool areScrollbarsShown() const noexcept { return scrollbarVisible; }
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/** Changes the password character used to disguise the text.
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@param passwordCharacter if this is not zero, this character will be used as a replacement
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for all characters that are drawn on screen - e.g. to create
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a password-style textbox containing circular blobs instead of text,
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you could set this value to 0x25cf, which is the unicode character
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for a black splodge (not all fonts include this, though), or 0x2022,
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which is a bullet (probably the best choice for linux).
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*/
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void setPasswordCharacter (juce_wchar passwordCharacter);
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/** Returns the current password character.
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@see setPasswordCharacter
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*/
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juce_wchar getPasswordCharacter() const noexcept { return passwordCharacter; }
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//==============================================================================
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/** Allows a right-click menu to appear for the editor.
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(This defaults to being enabled).
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If enabled, right-clicking (or command-clicking on the Mac) will pop up a menu
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of options such as cut/copy/paste, undo/redo, etc.
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*/
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void setPopupMenuEnabled (bool menuEnabled);
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/** Returns true if the right-click menu is enabled.
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@see setPopupMenuEnabled
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*/
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bool isPopupMenuEnabled() const noexcept { return popupMenuEnabled; }
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/** Returns true if a popup-menu is currently being displayed. */
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bool isPopupMenuCurrentlyActive() const noexcept { return menuActive; }
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//==============================================================================
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/** A set of colour IDs to use to change the colour of various aspects of the editor.
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These constants can be used either via the Component::setColour(), or LookAndFeel::setColour()
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methods.
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@see Component::setColour, Component::findColour, LookAndFeel::setColour, LookAndFeel::findColour
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*/
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enum ColourIds
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{
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backgroundColourId = 0x1000200, /**< The colour to use for the text component's background - this can be
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transparent if necessary. */
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textColourId = 0x1000201, /**< The colour that will be used when text is added to the editor. Note
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that because the editor can contain multiple colours, calling this
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method won't change the colour of existing text - to do that, call
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applyFontToAllText() after calling this method.*/
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highlightColourId = 0x1000202, /**< The colour with which to fill the background of highlighted sections of
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the text - this can be transparent if you don't want to show any
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highlighting.*/
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highlightedTextColourId = 0x1000203, /**< The colour with which to draw the text in highlighted sections. */
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outlineColourId = 0x1000205, /**< If this is non-transparent, it will be used to draw a box around
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the edge of the component. */
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focusedOutlineColourId = 0x1000206, /**< If this is non-transparent, it will be used to draw a box around
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the edge of the component when it has focus. */
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shadowColourId = 0x1000207, /**< If this is non-transparent, it'll be used to draw an inner shadow
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around the edge of the editor. */
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};
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//==============================================================================
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/** Sets the font to use for newly added text.
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This will change the font that will be used next time any text is added or entered
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into the editor. It won't change the font of any existing text - to do that, use
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applyFontToAllText() instead.
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@see applyFontToAllText
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*/
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void setFont (const Font& newFont);
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/** Applies a font to all the text in the editor.
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This will also set the current font to use for any new text that's added.
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@see setFont
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*/
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void applyFontToAllText (const Font& newFont);
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/** Returns the font that's currently being used for new text.
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@see setFont
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*/
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const Font& getFont() const noexcept { return currentFont; }
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//==============================================================================
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/** If set to true, focusing on the editor will highlight all its text.
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(Set to false by default).
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This is useful for boxes where you expect the user to re-enter all the
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text when they focus on the component, rather than editing what's already there.
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*/
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void setSelectAllWhenFocused (bool shouldSelectAll);
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/** When the text editor is empty, it can be set to display a message.
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This is handy for things like telling the user what to type in the box - the
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string is only displayed, it's not taken to actually be the contents of
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the editor.
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*/
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void setTextToShowWhenEmpty (const String& text, Colour colourToUse);
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//==============================================================================
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/** Changes the size of the scrollbars that are used.
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Handy if you need smaller scrollbars for a small text box.
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*/
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void setScrollBarThickness (int newThicknessPixels);
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//==============================================================================
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/**
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Receives callbacks from a TextEditor component when it changes.
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@see TextEditor::addListener
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*/
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class JUCE_API Listener
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{
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public:
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/** Destructor. */
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virtual ~Listener() {}
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/** Called when the user changes the text in some way. */
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virtual void textEditorTextChanged (TextEditor&) {}
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/** Called when the user presses the return key. */
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virtual void textEditorReturnKeyPressed (TextEditor&) {}
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/** Called when the user presses the escape key. */
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virtual void textEditorEscapeKeyPressed (TextEditor&) {}
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/** Called when the text editor loses focus. */
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virtual void textEditorFocusLost (TextEditor&) {}
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};
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/** Registers a listener to be told when things happen to the text.
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@see removeListener
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*/
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void addListener (Listener* newListener);
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/** Deregisters a listener.
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@see addListener
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*/
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void removeListener (Listener* listenerToRemove);
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//==============================================================================
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/** Returns the entire contents of the editor. */
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String getText() const;
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/** Returns a section of the contents of the editor. */
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String getTextInRange (const Range<int>& textRange) const override;
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/** Returns true if there are no characters in the editor.
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This is far more efficient than calling getText().isEmpty().
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*/
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bool isEmpty() const;
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/** Sets the entire content of the editor.
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This will clear the editor and insert the given text (using the current text colour
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and font). You can set the current text colour using
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@code setColour (TextEditor::textColourId, ...);
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@endcode
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@param newText the text to add
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@param sendTextChangeMessage if true, this will cause a change message to
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be sent to all the listeners.
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@see insertText
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*/
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void setText (const String& newText,
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bool sendTextChangeMessage = true);
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/** Returns a Value object that can be used to get or set the text.
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Bear in mind that this operate quite slowly if your text box contains large
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amounts of text, as it needs to dynamically build the string that's involved.
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It's best used for small text boxes.
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*/
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Value& getTextValue();
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/** Inserts some text at the current caret position.
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If a section of the text is highlighted, it will be replaced by
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this string, otherwise it will be inserted.
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To delete a section of text, you can use setHighlightedRegion() to
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highlight it, and call insertTextAtCursor (String::empty).
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@see setCaretPosition, getCaretPosition, setHighlightedRegion
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*/
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void insertTextAtCaret (const String& textToInsert) override;
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/** Deletes all the text from the editor. */
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void clear();
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/** Deletes the currently selected region.
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This doesn't copy the deleted section to the clipboard - if you need to do that, call copy() first.
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@see copy, paste, SystemClipboard
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*/
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void cut();
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/** Copies the currently selected region to the clipboard.
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@see cut, paste, SystemClipboard
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*/
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void copy();
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/** Pastes the contents of the clipboard into the editor at the caret position.
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@see cut, copy, SystemClipboard
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*/
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void paste();
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//==============================================================================
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/** Returns the current index of the caret.
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@see setCaretPosition
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*/
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int getCaretPosition() const;
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/** Moves the caret to be in front of a given character.
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@see getCaretPosition, moveCaretToEnd
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*/
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void setCaretPosition (int newIndex);
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/** Attempts to scroll the text editor so that the caret ends up at
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a specified position.
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This won't affect the caret's position within the text, it tries to scroll
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the entire editor vertically and horizontally so that the caret is sitting
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at the given position (relative to the top-left of this component).
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Depending on the amount of text available, it might not be possible to
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scroll far enough for the caret to reach this exact position, but it
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will go as far as it can in that direction.
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*/
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void scrollEditorToPositionCaret (int desiredCaretX, int desiredCaretY);
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/** Get the graphical position of the caret.
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The rectangle returned is relative to the component's top-left corner.
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@see scrollEditorToPositionCaret
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*/
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Rectangle<int> getCaretRectangle() override;
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/** Selects a section of the text. */
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void setHighlightedRegion (const Range<int>& newSelection) override;
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/** Returns the range of characters that are selected.
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If nothing is selected, this will return an empty range.
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@see setHighlightedRegion
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*/
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Range<int> getHighlightedRegion() const override { return selection; }
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/** Returns the section of text that is currently selected. */
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String getHighlightedText() const;
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/** Finds the index of the character at a given position.
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The coordinates are relative to the component's top-left.
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*/
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int getTextIndexAt (int x, int y);
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/** Counts the number of characters in the text.
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This is quicker than getting the text as a string if you just need to know
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the length.
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*/
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int getTotalNumChars() const;
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/** Returns the total width of the text, as it is currently laid-out.
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This may be larger than the size of the TextEditor, and can change when
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the TextEditor is resized or the text changes.
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*/
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int getTextWidth() const;
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/** Returns the maximum height of the text, as it is currently laid-out.
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This may be larger than the size of the TextEditor, and can change when
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the TextEditor is resized or the text changes.
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*/
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int getTextHeight() const;
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/** Changes the size of the gap at the top and left-edge of the editor.
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By default there's a gap of 4 pixels.
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*/
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void setIndents (int newLeftIndent, int newTopIndent);
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/** Changes the size of border left around the edge of the component.
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@see getBorder
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*/
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void setBorder (const BorderSize<int>& border);
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/** Returns the size of border around the edge of the component.
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@see setBorder
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*/
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BorderSize<int> getBorder() const;
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/** Used to disable the auto-scrolling which keeps the caret visible.
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If true (the default), the editor will scroll when the caret moves offscreen. If
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set to false, it won't.
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*/
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void setScrollToShowCursor (bool shouldScrollToShowCaret);
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|
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//==============================================================================
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void moveCaretToEnd();
|
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bool moveCaretLeft (bool moveInWholeWordSteps, bool selecting);
|
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bool moveCaretRight (bool moveInWholeWordSteps, bool selecting);
|
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bool moveCaretUp (bool selecting);
|
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bool moveCaretDown (bool selecting);
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bool pageUp (bool selecting);
|
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bool pageDown (bool selecting);
|
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bool scrollDown();
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bool scrollUp();
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bool moveCaretToTop (bool selecting);
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bool moveCaretToStartOfLine (bool selecting);
|
|
bool moveCaretToEnd (bool selecting);
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bool moveCaretToEndOfLine (bool selecting);
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bool deleteBackwards (bool moveInWholeWordSteps);
|
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bool deleteForwards (bool moveInWholeWordSteps);
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bool copyToClipboard();
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bool cutToClipboard();
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bool pasteFromClipboard();
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bool selectAll();
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bool undo();
|
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bool redo();
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|
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//==============================================================================
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|
/** This adds the items to the popup menu.
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By default it adds the cut/copy/paste items, but you can override this if
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you need to replace these with your own items.
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If you want to add your own items to the existing ones, you can override this,
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call the base class's addPopupMenuItems() method, then append your own items.
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When the menu has been shown, performPopupMenuAction() will be called to
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perform the item that the user has chosen.
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The default menu items will be added using item IDs from the
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StandardApplicationCommandIDs namespace.
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If this was triggered by a mouse-click, the mouseClickEvent parameter will be
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a pointer to the info about it, or may be null if the menu is being triggered
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by some other means.
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@see performPopupMenuAction, setPopupMenuEnabled, isPopupMenuEnabled
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*/
|
|
virtual void addPopupMenuItems (PopupMenu& menuToAddTo,
|
|
const MouseEvent* mouseClickEvent);
|
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|
|
/** This is called to perform one of the items that was shown on the popup menu.
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|
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If you've overridden addPopupMenuItems(), you should also override this
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to perform the actions that you've added.
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If you've overridden addPopupMenuItems() but have still left the default items
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|
on the menu, remember to call the superclass's performPopupMenuAction()
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so that it can perform the default actions if that's what the user clicked on.
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|
|
|
@see addPopupMenuItems, setPopupMenuEnabled, isPopupMenuEnabled
|
|
*/
|
|
virtual void performPopupMenuAction (int menuItemID);
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|
|
//==============================================================================
|
|
/** Base class for input filters that can be applied to a TextEditor to restrict
|
|
the text that can be entered.
|
|
*/
|
|
class JUCE_API InputFilter
|
|
{
|
|
public:
|
|
InputFilter() {}
|
|
virtual ~InputFilter() {}
|
|
|
|
/** This method is called whenever text is entered into the editor.
|
|
An implementation of this class should should check the input string,
|
|
and return an edited version of it that should be used.
|
|
*/
|
|
virtual String filterNewText (TextEditor&, const String& newInput) = 0;
|
|
};
|
|
|
|
/** An input filter for a TextEditor that limits the length of text and/or the
|
|
characters that it may contain.
|
|
*/
|
|
class JUCE_API LengthAndCharacterRestriction : public InputFilter
|
|
{
|
|
public:
|
|
/** Creates a filter that limits the length of text, and/or the characters that it can contain.
|
|
@param maxNumChars if this is > 0, it sets a maximum length limit; if <= 0, no
|
|
limit is set
|
|
@param allowedCharacters if this is non-empty, then only characters that occur in
|
|
this string are allowed to be entered into the editor.
|
|
*/
|
|
LengthAndCharacterRestriction (int maxNumChars, const String& allowedCharacters);
|
|
|
|
private:
|
|
String allowedCharacters;
|
|
int maxLength;
|
|
|
|
String filterNewText (TextEditor&, const String&) override;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LengthAndCharacterRestriction)
|
|
};
|
|
|
|
/** Sets an input filter that should be applied to this editor.
|
|
The filter can be nullptr, to remove any existing filters.
|
|
If takeOwnership is true, then the filter will be owned and deleted by the editor
|
|
when no longer needed.
|
|
*/
|
|
void setInputFilter (InputFilter* newFilter, bool takeOwnership);
|
|
|
|
/** Sets limits on the characters that can be entered.
|
|
This is just a shortcut that passes an instance of the LengthAndCharacterRestriction
|
|
class to setInputFilter().
|
|
|
|
@param maxTextLength if this is > 0, it sets a maximum length limit; if 0, no
|
|
limit is set
|
|
@param allowedCharacters if this is non-empty, then only characters that occur in
|
|
this string are allowed to be entered into the editor.
|
|
*/
|
|
void setInputRestrictions (int maxTextLength,
|
|
const String& allowedCharacters = String::empty);
|
|
|
|
//==============================================================================
|
|
/** This abstract base class is implemented by LookAndFeel classes to provide
|
|
TextEditor drawing functionality.
|
|
*/
|
|
struct JUCE_API LookAndFeelMethods
|
|
{
|
|
virtual ~LookAndFeelMethods() {}
|
|
|
|
virtual void fillTextEditorBackground (Graphics&, int width, int height, TextEditor&) = 0;
|
|
virtual void drawTextEditorOutline (Graphics&, int width, int height, TextEditor&) = 0;
|
|
|
|
virtual CaretComponent* createCaretComponent (Component* keyFocusOwner) = 0;
|
|
};
|
|
|
|
//==============================================================================
|
|
/** @internal */
|
|
void paint (Graphics&) override;
|
|
/** @internal */
|
|
void paintOverChildren (Graphics&) override;
|
|
/** @internal */
|
|
void mouseDown (const MouseEvent&) override;
|
|
/** @internal */
|
|
void mouseUp (const MouseEvent&) override;
|
|
/** @internal */
|
|
void mouseDrag (const MouseEvent&) override;
|
|
/** @internal */
|
|
void mouseDoubleClick (const MouseEvent&) override;
|
|
/** @internal */
|
|
void mouseWheelMove (const MouseEvent&, const MouseWheelDetails&) override;
|
|
/** @internal */
|
|
bool keyPressed (const KeyPress&) override;
|
|
/** @internal */
|
|
bool keyStateChanged (bool) override;
|
|
/** @internal */
|
|
void focusGained (FocusChangeType) override;
|
|
/** @internal */
|
|
void focusLost (FocusChangeType) override;
|
|
/** @internal */
|
|
void resized() override;
|
|
/** @internal */
|
|
void enablementChanged() override;
|
|
/** @internal */
|
|
void colourChanged() override;
|
|
/** @internal */
|
|
void lookAndFeelChanged() override;
|
|
/** @internal */
|
|
bool isTextInputActive() const override;
|
|
/** @internal */
|
|
void setTemporaryUnderlining (const Array <Range<int> >&) override;
|
|
|
|
protected:
|
|
//==============================================================================
|
|
/** Scrolls the minimum distance needed to get the caret into view. */
|
|
void scrollToMakeSureCursorIsVisible();
|
|
|
|
/** Used internally to dispatch a text-change message. */
|
|
void textChanged();
|
|
|
|
/** Begins a new transaction in the UndoManager. */
|
|
void newTransaction();
|
|
|
|
/** Can be overridden to intercept return key presses directly */
|
|
virtual void returnPressed();
|
|
|
|
/** Can be overridden to intercept escape key presses directly */
|
|
virtual void escapePressed();
|
|
|
|
private:
|
|
//==============================================================================
|
|
class Iterator;
|
|
JUCE_PUBLIC_IN_DLL_BUILD (class UniformTextSection)
|
|
class TextHolderComponent;
|
|
class InsertAction;
|
|
class RemoveAction;
|
|
friend class InsertAction;
|
|
friend class RemoveAction;
|
|
|
|
ScopedPointer <Viewport> viewport;
|
|
TextHolderComponent* textHolder;
|
|
BorderSize<int> borderSize;
|
|
|
|
bool readOnly : 1;
|
|
bool multiline : 1;
|
|
bool wordWrap : 1;
|
|
bool returnKeyStartsNewLine : 1;
|
|
bool popupMenuEnabled : 1;
|
|
bool selectAllTextWhenFocused : 1;
|
|
bool scrollbarVisible : 1;
|
|
bool wasFocused : 1;
|
|
bool keepCaretOnScreen : 1;
|
|
bool tabKeyUsed : 1;
|
|
bool menuActive : 1;
|
|
bool valueTextNeedsUpdating : 1;
|
|
bool consumeEscAndReturnKeys : 1;
|
|
|
|
UndoManager undoManager;
|
|
ScopedPointer<CaretComponent> caret;
|
|
Range<int> selection;
|
|
int leftIndent, topIndent;
|
|
unsigned int lastTransactionTime;
|
|
Font currentFont;
|
|
mutable int totalNumChars;
|
|
int caretPosition;
|
|
Array <UniformTextSection*> sections;
|
|
String textToShowWhenEmpty;
|
|
Colour colourForTextWhenEmpty;
|
|
juce_wchar passwordCharacter;
|
|
OptionalScopedPointer<InputFilter> inputFilter;
|
|
Value textValue;
|
|
|
|
enum
|
|
{
|
|
notDragging,
|
|
draggingSelectionStart,
|
|
draggingSelectionEnd
|
|
} dragType;
|
|
|
|
ListenerList <Listener> listeners;
|
|
Array <Range<int> > underlinedSections;
|
|
|
|
void moveCaret (int newCaretPos);
|
|
void moveCaretTo (int newPosition, bool isSelecting);
|
|
void handleCommandMessage (int) override;
|
|
void coalesceSimilarSections();
|
|
void splitSection (int sectionIndex, int charToSplitAt);
|
|
void clearInternal (UndoManager*);
|
|
void insert (const String&, int insertIndex, const Font&, const Colour, UndoManager*, int newCaretPos);
|
|
void reinsert (int insertIndex, const Array <UniformTextSection*>&);
|
|
void remove (Range<int> range, UndoManager*, int caretPositionToMoveTo);
|
|
void getCharPosition (int index, float& x, float& y, float& lineHeight) const;
|
|
void updateCaretPosition();
|
|
void updateValueFromText();
|
|
void textWasChangedByValue();
|
|
int indexAtPosition (float x, float y);
|
|
int findWordBreakAfter (int position) const;
|
|
int findWordBreakBefore (int position) const;
|
|
bool moveCaretWithTransaction (int newPos, bool selecting);
|
|
friend class TextHolderComponent;
|
|
friend class TextEditorViewport;
|
|
void drawContent (Graphics&);
|
|
void updateTextHolderSize();
|
|
float getWordWrapWidth() const;
|
|
void timerCallbackInt();
|
|
void repaintText (Range<int>);
|
|
void scrollByLines (int deltaLines);
|
|
bool undoOrRedo (bool shouldUndo);
|
|
UndoManager* getUndoManager() noexcept;
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (TextEditor)
|
|
};
|
|
|
|
/** This typedef is just for compatibility with old code - newer code should use the TextEditor::Listener class directly. */
|
|
typedef TextEditor::Listener TextEditorListener;
|
|
|
|
|
|
#endif // JUCE_TEXTEDITOR_H_INCLUDED
|
|
|