Improve color slider edit history

include/ui/colorinputwidget.h

@@ -25,6 +25,7 @@ public:
 signals:
     void colorChanged(QRgb color);
     void bitDepthChanged(int bits);
+    void editingFinished();
 
 private:
     Ui::ColorInputWidget *ui;

include/ui/paletteeditor.h

@@ -39,6 +39,7 @@ private:
 
     Tileset* getTileset(int paletteId);
     void refreshColorInputs();
+    void commitEditHistory();
     void commitEditHistory(int paletteId);
     void restoreWindowState();
     void closeEvent(QCloseEvent*);

src/ui/colorinputwidget.cpp

@@ -34,6 +34,7 @@ ColorInputWidget::ColorInputWidget(const QString &title, QWidget *parent) :
 void ColorInputWidget::init() {
     ui->setupUi(this);
 
+    // Connect color change signals
     connect(ui->slider_Red,   &QSlider::valueChanged, this, &ColorInputWidget::setRgbFromSliders);
     connect(ui->slider_Green, &QSlider::valueChanged, this, &ColorInputWidget::setRgbFromSliders);
     connect(ui->slider_Blue,  &QSlider::valueChanged, this, &ColorInputWidget::setRgbFromSliders);
@@ -46,6 +47,19 @@ void ColorInputWidget::init() {
     ui->lineEdit_Hex->setValidator(&hexValidator);
     connect(ui->lineEdit_Hex, &QLineEdit::textEdited, this, &ColorInputWidget::setRgbFromHexString);
 
+    // We have separate signals for when color input editing finishes.
+    // This is mostly useful for external commit histories, esp. for the sliders which can rapidly emit color change signals.
+    connect(ui->slider_Red,   &QSlider::sliderReleased, this, &ColorInputWidget::editingFinished);
+    connect(ui->slider_Green, &QSlider::sliderReleased, this, &ColorInputWidget::editingFinished);
+    connect(ui->slider_Blue,  &QSlider::sliderReleased, this, &ColorInputWidget::editingFinished);
+
+    connect(ui->spinBox_Red,   &QSpinBox::editingFinished, this, &ColorInputWidget::editingFinished);
+    connect(ui->spinBox_Green, &QSpinBox::editingFinished, this, &ColorInputWidget::editingFinished);
+    connect(ui->spinBox_Blue,  &QSpinBox::editingFinished, this, &ColorInputWidget::editingFinished);
+
+    connect(ui->lineEdit_Hex, &QLineEdit::editingFinished, this, &ColorInputWidget::editingFinished);
+
+    // Connect color picker
     connect(ui->button_Eyedrop, &QToolButton::clicked, this, &ColorInputWidget::pickColor);
 
     setBitDepth(24);
@@ -210,5 +224,6 @@ void ColorInputWidget::pickColor() {
     if (picker.exec() == QDialog::Accepted) {
         QColor c = picker.getColor();
         setColor(c.rgb());
+        emit editingFinished();
     }
 }

src/ui/paletteeditor.cpp

@@ -24,6 +24,7 @@ PaletteEditor::PaletteEditor(Project *project, Tileset *primaryTileset, Tileset
     for (int i = 0; i < this->numColors; i++) {
         auto colorInput = new ColorInputWidget(QString("Color %1").arg(i));
         connect(colorInput, &ColorInputWidget::colorChanged, [this, i](QRgb color) { setRgb(i, color); });
+        connect(colorInput, &ColorInputWidget::editingFinished, [this] { commitEditHistory(); });
         this->colorInputs.append(colorInput);
         ui->layout_Colors->addWidget(colorInput, i / numColorsPerRow, i % numColorsPerRow);
     }
@@ -46,7 +47,7 @@ PaletteEditor::PaletteEditor(Project *project, Tileset *primaryTileset, Tileset
     connect(this->ui->bit_depth_24, &QRadioButton::toggled, [this](bool checked){ if (checked) this->setBitDepth(24); });
 
     this->setPaletteId(paletteId);
-    this->commitEditHistory(this->ui->spinBox_PaletteId->value());
+    this->commitEditHistory();
     this->restoreWindowState();
 }
 
@@ -75,8 +76,7 @@ void PaletteEditor::setRgb(int colorIndex, QRgb rgb) {
     Tileset *tileset = getTileset(paletteId);
     tileset->palettes[paletteId][colorIndex] = rgb;
     tileset->palettePreviews[paletteId][colorIndex] = rgb;
-    
+
-    commitEditHistory(paletteId);
     emit changedPaletteColor();
 }
 
@@ -120,6 +120,10 @@ void PaletteEditor::on_spinBox_PaletteId_valueChanged(int paletteId) {
     emit this->changedPalette(paletteId);
 }
 
+void PaletteEditor::commitEditHistory() {
+    commitEditHistory(ui->spinBox_PaletteId->value());
+}
+
 void PaletteEditor::commitEditHistory(int paletteId) {
     QList<QRgb> colors;
     for (int i = 0; i < this->numColors; i++) {