Add image preview in import dialog

1 files changed, 70 insertions, 0 deletions

diff --git a/noncore/graphics/drawpad/importdialog.cpp b/noncore/graphics/drawpad/importdialog.cpp
index 7722417..dc78bf3 100644
--- a/noncore/graphics/drawpad/importdialog.cpp
+++ b/noncore/graphics/drawpad/importdialog.cpp
@@ -18,3 +18,7 @@
 
+#include <qcheckbox.h>
+#include <qimage.h>
+#include <qlabel.h>
 #include <qlayout.h>
+#include <qpushbutton.h>
 
@@ -26,2 +30,3 @@ ImportDialog::ImportDialog(QWidget* parent, const char* name)
     m_pFileSelector = new FileSelector("image/*", this, "fileselector");
+    connect(m_pFileSelector, SIGNAL(fileSelected(const DocLnk&)), this, SLOT(fileChanged()));
     m_pFileSelector->setNewVisible(false);
@@ -29,4 +34,29 @@ ImportDialog::ImportDialog(QWidget* parent, const char* name)
 
+    m_pPreviewLabel = new QLabel(this);
+    m_pPreviewLabel->setFrameStyle(QFrame::Panel | QFrame::Sunken);
+    m_pPreviewLabel->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
+    m_pPreviewLabel->setFixedSize(114, 114);
+    m_pPreviewLabel->setBackgroundMode(QWidget:: PaletteMid);
+
+    m_pAutomaticPreviewCheckBox = new QCheckBox(tr("Automatic preview"), this);
+    m_pAutomaticPreviewCheckBox->setChecked(true);
+
+    QPushButton* previewPushButton = new QPushButton(tr("Preview"), this);
+    connect(previewPushButton, SIGNAL(clicked()), this, SLOT(preview()));
+
     QVBoxLayout* mainLayout = new QVBoxLayout(this, 4, 4);
+    QHBoxLayout* previewLayout = new QHBoxLayout(4);
+    QVBoxLayout* previewSecondLayout = new QVBoxLayout(4);
+
+    previewSecondLayout->addWidget(m_pAutomaticPreviewCheckBox);
+    previewSecondLayout->addWidget(previewPushButton);
+    previewSecondLayout->addStretch();
+
+    previewLayout->addWidget(m_pPreviewLabel);
+    previewLayout->addLayout(previewSecondLayout);
+
     mainLayout->addWidget(m_pFileSelector);
+    mainLayout->addLayout(previewLayout);
+
+    preview();
 }
@@ -41 +71,41 @@ const DocLnk* ImportDialog::selected()
 }
+
+void ImportDialog::fileChanged()
+{
+    if (m_pAutomaticPreviewCheckBox->isChecked()) {
+        preview();
+    }
+}
+
+void ImportDialog::preview()
+{
+    const DocLnk* docLnk = m_pFileSelector->selected();
+
+    if (docLnk) {
+        QImage image(docLnk->file());
+
+        int previewWidth = m_pPreviewLabel->contentsRect().width();
+        int previewHeight = m_pPreviewLabel->contentsRect().height();
+
+        float widthScale = 1.0;
+        float heightScale = 1.0;
+
+        if (previewWidth < image.width()) {
+            widthScale = (float)previewWidth / float(image.width());
+        }
+
+        if (previewHeight < image.height()) {
+            heightScale = (float)previewHeight / float(image.height());
+        }
+
+        float scale = (widthScale < heightScale ? widthScale : heightScale);
+        QImage previewImage = image.smoothScale((int)(image.width() * scale) , (int)(image.height() * scale));
+
+        QPixmap previewPixmap;
+        previewPixmap.convertFromImage(previewImage);
+
+        m_pPreviewLabel->setPixmap(previewPixmap);
+
+        delete docLnk;
+    }
+}