Improvement of Pin tool (#191)

- no taskbar window for pin widget
- completely ignore the window manager
- add borderless window shadow effects

src/tools/pin/pintool.cpp

@@ -44,7 +44,11 @@ QString PinTool::description() const {
 
 QWidget* PinTool::widget() {
     PinWidget *w = new PinWidget(m_pixmap);
-    w->setGeometry(m_geometry);
+    QRect adjusted_pos = QRect (m_geometry.left() - LAYOUT_MARGIN,
+                                m_geometry.top() - LAYOUT_MARGIN,
+                                m_geometry.width() + 2 * LAYOUT_MARGIN,
+                                m_geometry.height() + 2 * LAYOUT_MARGIN);
+    w->setGeometry(adjusted_pos);
     return w;
 }
 

src/tools/pin/pinwidget.cpp

@@ -26,8 +26,19 @@ PinWidget::PinWidget(const QPixmap &pixmap, QWidget *parent) :
     QWidget(parent), m_pixmap(pixmap)
 {
     setWindowFlags(Qt::WindowStaysOnTopHint
-                   | Qt::FramelessWindowHint);
+                   | Qt::FramelessWindowHint
+                   | Qt::Tool
+                   | Qt::X11BypassWindowManagerHint);
+    //set the bottom widget background transparent
+    setAttribute(Qt::WA_TranslucentBackground);
+
+    m_shadowEffect->setColor(Qt::lightGray);
+    m_shadowEffect->setBlurRadius(2 * LAYOUT_MARGIN);
+    m_shadowEffect->setOffset(0, 0);
+    setGraphicsEffect(m_shadowEffect);
+
     m_layout = new QVBoxLayout(this);
+    m_layout->setContentsMargins(LAYOUT_MARGIN, LAYOUT_MARGIN, LAYOUT_MARGIN, LAYOUT_MARGIN);
 
     m_label = new QLabel();
     m_label->setPixmap(m_pixmap);
@@ -49,6 +60,13 @@ void PinWidget::wheelEvent(QWheelEvent *e) {
     e->accept();
 }
 
+void PinWidget::enterEvent(QEvent *) {
+    m_shadowEffect->setColor(QColor(3, 150, 255));
+}
+void PinWidget::leaveEvent(QEvent *) {
+    m_shadowEffect->setColor(Qt::lightGray);
+}
+
 void PinWidget::mouseDoubleClickEvent(QMouseEvent *) {
     close();
 }

src/tools/pin/pinwidget.h

@@ -18,6 +18,9 @@
 #pragma once
 
 #include <QWidget>
+#include <QGraphicsDropShadowEffect>
+
+#define LAYOUT_MARGIN 7
 
 class QVBoxLayout;
 class QLabel;
@@ -32,6 +35,8 @@ protected:
     void mouseDoubleClickEvent(QMouseEvent *);
     void mousePressEvent(QMouseEvent *);
     void mouseMoveEvent(QMouseEvent *);
+    void enterEvent(QEvent *);
+    void leaveEvent(QEvent *);
 
 private:
     void setScaledPixmap(const QSize &size);
@@ -41,4 +46,5 @@ private:
     QLabel *m_label;
     QPoint m_dragStart;
     qreal m_offsetX, m_offsetY;
+    QGraphicsDropShadowEffect *m_shadowEffect = new QGraphicsDropShadowEffect(this);
 };