set displayed filepath when loading in state

Source/ExposesComponents.h

@@ -0,0 +1,16 @@
+//
+// Created by Alex Birch on 11/04/2018.
+// Copyright (c) 2018 Birchlabs. All rights reserved.
+//
+
+#pragma once
+
+#import "FilePickerFragment.h"
+
+class ExposesComponents {
+public:
+    virtual ~ExposesComponents() {}
+
+    virtual FilePickerFragment& getFilePicker() = 0;
+
+};

Source/FilePicker.cpp

@@ -18,14 +18,12 @@ FilePicker::FilePicker(
         String(),
         "Choose a Soundfont file to load into the synthesizer"
 ),
-  fluidSynthModel(fluidSynthModel) {
+  fluidSynthModel(fluidSynthModel),
+  currentPath() {
     // faster (rounded edges introduce transparency)
     setOpaque (true);
 
-    const String& currentSoundFontAbsPath = fluidSynthModel->getCurrentSoundFontAbsPath();
-    if (currentSoundFontAbsPath.isNotEmpty()) {
-        fileChooser.setCurrentFile(File(currentSoundFontAbsPath), true, dontSendNotification);
-    }
+    setDisplayedFilePath(fluidSynthModel->getCurrentSoundFontAbsPath());
 
     addAndMakeVisible (fileChooser);
     fileChooser.addListener (this);
@@ -48,5 +46,24 @@ void FilePicker::paint(Graphics& g)
 }
 
 void FilePicker::filenameComponentChanged (FilenameComponent*) {
+    currentPath = fileChooser.getCurrentFile().getFullPathName();
     fluidSynthModel->onFileNameChanged(fileChooser.getCurrentFile().getFullPathName());
+}
+
+void FilePicker::setDisplayedFilePath(const String& path) {
+    if (!shouldChangeDisplayedFilePath(path)) {
+        return;
+    }
+    currentPath = path;
+    fileChooser.setCurrentFile(File(path), true, dontSendNotification);
+}
+
+bool FilePicker::shouldChangeDisplayedFilePath(const String &path) {
+    if (path.isEmpty()) {
+        return false;
+    }
+    if (path == currentPath) {
+        return false;
+    }
+    return true;
 }

Source/FilePicker.h

@@ -6,8 +6,10 @@
 
 #include "../JuceLibraryCode/JuceHeader.h"
 #include "FluidSynthModel.h"
+#import "FilePickerFragment.h"
 
 class FilePicker: public Component,
+                  public FilePickerFragment,
                   private FilenameComponentListener
 {
 public:
@@ -18,12 +20,18 @@ public:
 
     void resized() override;
     void paint (Graphics& g) override;
+
+    virtual void setDisplayedFilePath(const String&) override;
 private:
     FilenameComponent fileChooser;
 
     FluidSynthModel* fluidSynthModel;
 
+    String currentPath;
+
     void filenameComponentChanged (FilenameComponent*) override;
 
+    bool shouldChangeDisplayedFilePath(const String &path);
+
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FilePicker)
 };

Source/FilePickerFragment.h

@@ -0,0 +1,14 @@
+//
+// Created by Alex Birch on 11/04/2018.
+// Copyright (c) 2018 Birchlabs. All rights reserved.
+//
+
+#pragma once
+#include "../JuceLibraryCode/JuceHeader.h"
+
+class FilePickerFragment {
+public:
+    virtual ~FilePickerFragment() {}
+
+    virtual void setDisplayedFilePath(const String&) = 0;
+};

Source/PluginEditor.cpp

@@ -135,6 +135,6 @@ bool JuicySFAudioProcessorEditor::keyStateChanged (bool isKeyDown) {
 //    return false;
 }
 
-const FilePicker& JuicySFAudioProcessorEditor::getFilePicker() {
-
+FilePickerFragment& JuicySFAudioProcessorEditor::getFilePicker() {
+    return filePicker;
 }

Source/PluginEditor.h

@@ -14,13 +14,16 @@
 #include "PluginProcessor.h"
 #include "TablesComponent.h"
 #include "SurjectiveMidiKeyboardComponent.h"
+#include "FilePickerFragment.h"
+#include "ExposesComponents.h"
 #include "FilePicker.h"
 #include "StateChangeSubscriber.h"
 
 //==============================================================================
 /**
 */
-class JuicySFAudioProcessorEditor  : public AudioProcessorEditor/*,
+class JuicySFAudioProcessorEditor  : public AudioProcessorEditor,
+                                     public ExposesComponents/*,
                                      public StateChangeSubscriber*/
 {
 public:
@@ -37,7 +40,7 @@ public:
 //    void getStateInformation (XmlElement& xml) override;
 //    void setStateInformation (XmlElement* xmlState) override;
 
-    const FilePicker& getFilePicker();
+    virtual FilePickerFragment& getFilePicker() override;
 
 private:
     // This reference is provided as a quick way for your editor to

Source/PluginProcessor.cpp

@@ -12,6 +12,7 @@
 #include "PluginEditor.h"
 #include "SoundfontSynthVoice.h"
 #include "SoundfontSynthSound.h"
+#include "ExposesComponents.h"
 
 AudioProcessor* JUCE_CALLTYPE createPluginFilter();
 
@@ -241,6 +242,10 @@ void JuicySFAudioProcessor::setStateInformation (const void* data, int sizeInByt
             AudioProcessorEditor* editor = getActiveEditor();
             if (editor != nullptr) {
                 editor->setSize(lastUIWidth, lastUIHeight);
+
+                jassert(dynamic_cast<ExposesComponents*> (editor) != nullptr);
+                ExposesComponents* exposesComponents = dynamic_cast<ExposesComponents*> (editor);
+                exposesComponents->getFilePicker().setDisplayedFilePath(soundFontPath);
             }
 
 //            const String& currentSoundFontAbsPath = fluidSynthModel->getCurrentSoundFontAbsPath();