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-rw-r--r--pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/PDFViewerComposite.java54
1 files changed, 38 insertions, 16 deletions
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/PDFViewerComposite.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/PDFViewerComposite.java
index 1637da9e..7792fa3f 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/PDFViewerComposite.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/PDFViewerComposite.java
@@ -51,6 +51,38 @@ public class PDFViewerComposite extends Composite {
protected int page;
/**
+ * AWT Canvas displaying the document
+ */
+ private Canvas canvas = null;
+
+ /**
+ * Dimension of each page at default zoom
+ */
+ Dimension[] base_dimensions;
+
+ /**
+ * Set the document to be displayed
+ * @param document PDF document to be displayed
+ * @throws PDFException Error parsing PDF document
+ * @throws PDFSecurityException Error decrypting PDF document (not supported)
+ * @throws IOException I/O Error
+ */
+ public void setDocument(File document) throws PDFException, PDFSecurityException, IOException {
+ this.document = new Document();
+ this.document.setFile(document.getPath());
+ int pages = this.document.getNumberOfPages();
+
+ this.base_dimensions = new Dimension[pages];
+ for (int page = 0; page < pages; ++page)
+ this.base_dimensions[page] = this.document.getPageDimension(page, 0f, 1.0f).toDimension();
+
+ this.page = pages - 1;
+
+ if (this.canvas != null)
+ this.canvas.repaint();
+ }
+
+ /**
* Get the currently selected page in the document
* @return current page
*/
@@ -68,12 +100,9 @@ public class PDFViewerComposite extends Composite {
}
/**
- * AWT Canvas displaying the document
- */
- private Canvas canvas;
-
- /**
* Create the PDF Viewer composite.
+ * Displays a PDF document.
+ * Starts on the last page.
* @param parent parent Composite
* @param style
* @param document
@@ -83,15 +112,8 @@ public class PDFViewerComposite extends Composite {
*/
public PDFViewerComposite(Composite parent, int style, File document) throws PDFException, PDFSecurityException, IOException {
super(parent, style);
- this.document = new Document();
- this.document.setFile(document.getPath());
- int pages = this.document.getNumberOfPages();
-
- final Dimension[] base_dimensions = new Dimension[pages];
- for (int page = 0; page < pages; ++page)
- base_dimensions[page] = this.document.getPageDimension(page, 0f, 1.0f).toDimension();
- this.page = pages - 1;
+ setDocument(document);
Frame frame = SWT_AWT.new_Frame(this);
this.canvas = new Canvas() {
@@ -104,13 +126,13 @@ public class PDFViewerComposite extends Composite {
int page = getPage();
// Make page always fit to window
Rectangle2D clip = g.getClip().getBounds2D();
- double h_zoom = clip.getWidth() / base_dimensions[page].width;
- double v_zoom = clip.getHeight() / base_dimensions[page].height;
+ double h_zoom = clip.getWidth() / PDFViewerComposite.this.base_dimensions[page].width;
+ double v_zoom = clip.getHeight() / PDFViewerComposite.this.base_dimensions[page].height;
float zoom = (float) (h_zoom < v_zoom ? h_zoom : v_zoom);
if (v_zoom < h_zoom)
{
// Page is narrower than window, center it
- g.translate((int) ((clip.getWidth() - (base_dimensions[page].width * zoom)) / 2), 0);
+ g.translate((int) ((clip.getWidth() - (PDFViewerComposite.this.base_dimensions[page].width * zoom)) / 2), 0);
}
PDFViewerComposite.this.document.paintPage(page, g, GraphicsRenderingHints.SCREEN, Page.BOUNDARY_CROPBOX, 0f, zoom);