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229 lines
9.5 KiB
229 lines
9.5 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_FILENAMECOMPONENT_H_INCLUDED
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#define JUCE_FILENAMECOMPONENT_H_INCLUDED
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//==============================================================================
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/**
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Listens for events happening to a FilenameComponent.
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Use FilenameComponent::addListener() and FilenameComponent::removeListener() to
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register one of these objects for event callbacks when the filename is changed.
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@see FilenameComponent
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*/
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class JUCE_API FilenameComponentListener
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{
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public:
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/** Destructor. */
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virtual ~FilenameComponentListener() {}
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/** This method is called after the FilenameComponent's file has been changed. */
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virtual void filenameComponentChanged (FilenameComponent* fileComponentThatHasChanged) = 0;
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};
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//==============================================================================
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/**
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Shows a filename as an editable text box, with a 'browse' button and a
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drop-down list for recently selected files.
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A handy component for dialogue boxes where you want the user to be able to
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select a file or directory.
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Attach an FilenameComponentListener using the addListener() method, and it will
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get called each time the user changes the filename, either by browsing for a file
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and clicking 'ok', or by typing a new filename into the box and pressing return.
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@see FileChooser, ComboBox
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*/
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class JUCE_API FilenameComponent : public Component,
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public SettableTooltipClient,
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public FileDragAndDropTarget,
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private AsyncUpdater,
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private ButtonListener, // (can't use Button::Listener due to idiotic VC2005 bug)
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private ComboBoxListener
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{
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public:
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//==============================================================================
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/** Creates a FilenameComponent.
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@param name the name for this component.
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@param currentFile the file to initially show in the box
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@param canEditFilename if true, the user can manually edit the filename; if false,
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they can only change it by browsing for a new file
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@param isDirectory if true, the file will be treated as a directory, and
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an appropriate directory browser used
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@param isForSaving if true, the file browser will allow non-existent files to
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be picked, as the file is assumed to be used for saving rather
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than loading
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@param fileBrowserWildcard a wildcard pattern to use in the file browser - e.g. "*.txt;*.foo".
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If an empty string is passed in, then the pattern is assumed to be "*"
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@param enforcedSuffix if this is non-empty, it is treated as a suffix that will be added
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to any filenames that are entered or chosen
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@param textWhenNothingSelected the message to display in the box before any filename is entered. (This
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will only appear if the initial file isn't valid)
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*/
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FilenameComponent (const String& name,
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const File& currentFile,
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bool canEditFilename,
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bool isDirectory,
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bool isForSaving,
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const String& fileBrowserWildcard,
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const String& enforcedSuffix,
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const String& textWhenNothingSelected);
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/** Destructor. */
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~FilenameComponent();
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//==============================================================================
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/** Returns the currently displayed filename. */
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File getCurrentFile() const;
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/** Changes the current filename.
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@param newFile the new filename to use
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@param addToRecentlyUsedList if true, the filename will also be added to the
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drop-down list of recent files.
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@param notification whether to send a notification of the change to listeners
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*/
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void setCurrentFile (File newFile,
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bool addToRecentlyUsedList,
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NotificationType notification = sendNotificationAsync);
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/** Changes whether the use can type into the filename box.
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*/
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void setFilenameIsEditable (bool shouldBeEditable);
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/** Sets a file or directory to be the default starting point for the browser to show.
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This is only used if the current file hasn't been set.
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*/
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void setDefaultBrowseTarget (const File& newDefaultDirectory);
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/** This can be overridden to return a custom location that you want the dialog box
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to show when the browse button is pushed.
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The default implementation of this method will return either the current file
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(if one has been chosen) or the location that was set by setDefaultBrowseTarget().
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*/
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virtual File getLocationToBrowse();
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/** Returns all the entries on the recent files list.
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This can be used in conjunction with setRecentlyUsedFilenames() for saving the
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state of this list.
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@see setRecentlyUsedFilenames
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*/
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StringArray getRecentlyUsedFilenames() const;
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/** Sets all the entries on the recent files list.
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This can be used in conjunction with getRecentlyUsedFilenames() for saving the
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state of this list.
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@see getRecentlyUsedFilenames, addRecentlyUsedFile
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*/
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void setRecentlyUsedFilenames (const StringArray& filenames);
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/** Adds an entry to the recently-used files dropdown list.
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If the file is already in the list, it will be moved to the top. A limit
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is also placed on the number of items that are kept in the list.
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@see getRecentlyUsedFilenames, setRecentlyUsedFilenames, setMaxNumberOfRecentFiles
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*/
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void addRecentlyUsedFile (const File& file);
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/** Changes the limit for the number of files that will be stored in the recent-file list.
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*/
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void setMaxNumberOfRecentFiles (int newMaximum);
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/** Changes the text shown on the 'browse' button.
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By default this button just says "..." but you can change it. The button itself
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can be changed using the look-and-feel classes, so it might not actually have any
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text on it.
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*/
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void setBrowseButtonText (const String& browseButtonText);
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//==============================================================================
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/** Adds a listener that will be called when the selected file is changed. */
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void addListener (FilenameComponentListener* listener);
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/** Removes a previously-registered listener. */
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void removeListener (FilenameComponentListener* listener);
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/** Gives the component a tooltip. */
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void setTooltip (const String& newTooltip) override;
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//==============================================================================
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/** This abstract base class is implemented by LookAndFeel classes. */
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struct JUCE_API LookAndFeelMethods
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{
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virtual ~LookAndFeelMethods() {}
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virtual Button* createFilenameComponentBrowseButton (const String& text) = 0;
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virtual void layoutFilenameComponent (FilenameComponent&, ComboBox* filenameBox, Button* browseButton) = 0;
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};
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//==============================================================================
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/** @internal */
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void paintOverChildren (Graphics&) override;
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/** @internal */
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void resized() override;
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/** @internal */
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void lookAndFeelChanged() override;
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/** @internal */
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bool isInterestedInFileDrag (const StringArray&) override;
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/** @internal */
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void filesDropped (const StringArray&, int, int) override;
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/** @internal */
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void fileDragEnter (const StringArray&, int, int) override;
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/** @internal */
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void fileDragExit (const StringArray&) override;
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private:
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//==============================================================================
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ComboBox filenameBox;
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String lastFilename;
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ScopedPointer<Button> browseButton;
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int maxRecentFiles;
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bool isDir, isSaving, isFileDragOver;
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String wildcard, enforcedSuffix, browseButtonText;
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ListenerList <FilenameComponentListener> listeners;
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File defaultBrowseFile;
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void comboBoxChanged (ComboBox*) override;
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void buttonClicked (Button*) override;
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void handleAsyncUpdate() override;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FilenameComponent)
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};
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#endif // JUCE_FILENAMECOMPONENT_H_INCLUDED
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