changeset 797:edada332c374 tonioni

Add an experimental cancel button to view progress bars

--- a/view/View.cpp	Fri Jun 13 15:29:06 2014 +0100
+++ b/view/View.cpp	Fri Jun 13 17:39:01 2014 +0100
@@ -26,6 +26,8 @@
 #include "data/model/PowerOfSqrtTwoZoomConstraint.h"
 #include "data/model/RangeSummarisableTimeValueModel.h"
 
+#include "widgets/IconLoader.h"
+
 #include <QPainter>
 #include <QPaintEvent>
 #include <QRect>
@@ -34,6 +36,7 @@
 #include <QTextStream>
 #include <QFont>
 #include <QMessageBox>
+#include <QPushButton>
 
 #include <iostream>
 #include <cassert>
@@ -517,11 +520,6 @@
     else return Qt::white;
 }
 
-View::LayerProgressBar::LayerProgressBar(QWidget *parent) :
-    QProgressBar(parent)
-{
-}
-
 void
 View::addLayer(Layer *layer)
 {
@@ -539,7 +537,14 @@
     pb->setFixedWidth(80);
     pb->setTextVisible(false);
 
+    QPushButton *cancel = new QPushButton(this);
+    cancel->setIcon(IconLoader().load("fileclose"));
+    cancel->setFlat(true);
+    cancel->setFixedSize(QSize(20, 20));
+    connect(cancel, SIGNAL(clicked()), this, SLOT(cancelClicked()));
+    
     ProgressBarRec pbr;
+    pbr.cancel = cancel;
     pbr.bar = pb;
     pbr.lastCheck = 0;
     pbr.checkTimer = new QTimer();
@@ -552,6 +557,8 @@
     int fs = Preferences::getInstance()->getViewFontSize();
     f.setPointSize(std::min(fs, int(ceil(fs * 0.85))));
 
+    cancel->hide();
+
     pb->setFont(f);
     pb->hide();
     
@@ -594,6 +601,7 @@
 	    m_layers.erase(i);
 	    if (m_progressBars.find(layer) != m_progressBars.end()) {
 		delete m_progressBars[layer].bar;
+                delete m_progressBars[layer].cancel;
 		delete m_progressBars[layer].checkTimer;
 		m_progressBars.erase(layer);
 	    }
@@ -1460,6 +1468,25 @@
 }
 
 void
+View::cancelClicked()
+{
+    QPushButton *cancel = qobject_cast<QPushButton *>(sender());
+    if (!cancel) return;
+
+    for (ProgressMap::iterator i = m_progressBars.begin();
+	 i != m_progressBars.end(); ++i) {
+
+        if (i->second.cancel == cancel) {
+
+            Layer *layer = i->first;
+            Model *model = layer->getModel();
+
+            if (model) model->abandon();
+        }
+    }
+}
+
+void
 View::checkProgress(void *object)
 {
     if (!m_showProgress) return;
@@ -1470,6 +1497,7 @@
 	 i != m_progressBars.end(); ++i) {
 
         QProgressBar *pb = i->second.bar;
+        QPushButton *cancel = i->second.cancel;
 
 	if (i->first == object) {
 
@@ -1516,6 +1544,7 @@
 	    if (completion >= 100) {
 
 		pb->hide();
+                cancel->hide();
                 timer->stop();
 
 	    } else {
@@ -1528,8 +1557,11 @@
                     timer->start();
                 }
 
+                cancel->move(0, ph - pb->height()/2 - 10);
+                cancel->show();
+
 		pb->setValue(completion);
-		pb->move(0, ph - pb->height());
+		pb->move(20, ph - pb->height());
 
 		pb->show();
 		pb->update();

--- a/view/View.h	Fri Jun 13 15:29:06 2014 +0100
+++ b/view/View.h	Fri Jun 13 17:39:01 2014 +0100
@@ -29,6 +29,8 @@
 class Layer;
 class ViewPropertyContainer;
 
+class QPushButton;
+
 #include <map>
 #include <set>
 
@@ -309,6 +311,8 @@
     virtual void overlayModeChanged();
     virtual void zoomWheelsEnabledChanged();
 
+    virtual void cancelClicked();
+
     virtual void progressCheckStalledTimerElapsed();
 
 protected:
@@ -373,16 +377,8 @@
     mutable LayerList m_lastScrollableBackLayers;
     mutable LayerList m_lastNonScrollableBackLayers;
 
-    class LayerProgressBar : public QProgressBar {
-    public:
-	LayerProgressBar(QWidget *parent);
-	virtual QString text() const { return m_text; }
-	virtual void setText(QString text) { m_text = text; }
-    protected:
-	QString m_text;
-    };
-
     struct ProgressBarRec {
+        QPushButton *cancel;
         QProgressBar *bar;
         int lastCheck;
         QTimer *checkTimer;