Add configurable shortcuts for drawing tools

src/config/setshortcutwidget.cpp

@@ -0,0 +1,59 @@
+#include "setshortcutwidget.h"
+#include <QKeyEvent>
+#include <QLayout>
+#include <QLabel>
+#include <QIcon>
+#include <QPixmap>
+
+SetShortcutDialog::SetShortcutDialog(QDialog *parent) : QDialog(parent)
+{
+    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+    setWindowIcon(QIcon(":img/app/flameshot.svg"));
+    setWindowTitle(tr("Set Shortcut"));
+    m_ks = QKeySequence();
+
+    m_layout = new QVBoxLayout(this);
+    m_layout->setAlignment(Qt::AlignHCenter);
+
+    QLabel *infoTop = new QLabel(tr("Enter new shortcut to change "));
+    infoTop->setMargin(10);
+    infoTop->setAlignment(Qt::AlignCenter);
+    m_layout->addWidget(infoTop);
+
+    QLabel *infoIcon = new QLabel();
+    infoIcon->setAlignment(Qt::AlignCenter);
+    infoIcon->setPixmap(QPixmap(":/img/app/keyboard.svg"));
+    m_layout->addWidget(infoIcon);
+
+    m_layout->addWidget(infoIcon);
+
+    QLabel *infoBottom = new QLabel(tr("Press Esc to cancel or Backspace to disable the keyboard shortcut."));
+    infoBottom->setMargin(10);
+    infoBottom->setAlignment(Qt::AlignCenter);
+    m_layout->addWidget(infoBottom);
+}
+
+const QKeySequence& SetShortcutDialog::shortcut() {
+    return m_ks;
+}
+
+void SetShortcutDialog::keyPressEvent(QKeyEvent *ke) {
+    if (ke->modifiers() & Qt::ShiftModifier)
+        m_modifier += "Shift+";
+    if (ke->modifiers() & Qt::ControlModifier)
+        m_modifier += "Ctrl+";
+    if (ke->modifiers() & Qt::AltModifier)
+        m_modifier += "Alt+";
+    if (ke->modifiers() & Qt::MetaModifier)
+        m_modifier += "Meta+";
+
+    QString key = QKeySequence(ke->key()).toString();
+    m_ks = QKeySequence(m_modifier + key);
+}
+
+void SetShortcutDialog::keyReleaseEvent(QKeyEvent *event) {
+    if (m_ks == QKeySequence(Qt::Key_Escape)) {
+        reject();
+    }
+    accept();
+}