Started to implement the DataView class that will be the view to the editor.

For your entertaining it already shows the first block of the file/device.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6567 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/diskprobe/DataView.cpp

@@ -0,0 +1,145 @@
+/* 
+** Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+#include "DataView.h"
+#include "DataEditor.h"
+
+#include <Messenger.h>
+
+
+static const uint32 kBlockSize = 16;
+
+
+DataView::DataView(BRect rect, DataEditor &editor)
+	: BView(rect, "dataView", B_FOLLOW_NONE, B_WILL_DRAW),
+	fEditor(editor)
+{
+	fPositionLength = 4;
+	fDataSize = fEditor.ViewSize();
+	fData = (uint8 *)malloc(fDataSize);
+	fFontHeight = 15;
+
+	UpdateFromEditor();
+
+	SetFont(be_fixed_font);
+}
+
+
+DataView::~DataView()
+{
+}
+
+
+void 
+DataView::DetachedFromWindow()
+{
+	fEditor.StopWatching(this);
+}
+
+
+void 
+DataView::AttachedToWindow()
+{
+	fEditor.StartWatching(this);
+}
+
+
+void 
+DataView::UpdateFromEditor(BMessage */*message*/)
+{
+	if (fData == NULL)
+		return;
+
+	if (fEditor.Lock()) {
+		fOffset = fEditor.ViewOffset();
+
+		const uint8 *data;
+		if (fEditor.GetViewBuffer(&data) == B_OK)
+			memcpy(fData, data, fDataSize);
+
+		fEditor.Unlock();
+	}
+}
+
+
+void 
+DataView::MessageReceived(BMessage *message)
+{
+	switch (message->what) {
+		case B_OBSERVER_NOTICE_CHANGE: {
+			int32 what;
+			if (message->FindInt32(B_OBSERVE_WHAT_CHANGE, &what) != B_OK)
+				break;
+
+			switch (what) {
+				case kMsgDataEditorUpdate:
+					UpdateFromEditor(message);
+					break;
+			}
+			break;
+		}
+
+		default:
+			BView::MessageReceived(message);
+	}
+}
+
+
+void
+DataView::ConvertLine(char *line, off_t offset, const uint8 *buffer, size_t size)
+{
+	line += sprintf(line, "%0*Lx:  ", (int)fPositionLength, offset);
+
+	for (uint32 i = 0; i < kBlockSize; i++) {
+		if (!(i % 4))
+			*line++ = ' ';
+
+		if (i >= size) {
+			strcpy(line, "  ");
+			line += 2;
+		} else
+			line += sprintf(line, "%02x", *(unsigned char *)(buffer + i));
+	}
+
+	strcpy(line, "   ");
+	line += 3;
+
+	for (uint32 i = 0; i < kBlockSize; i++) {
+		if (i < size) {
+			char c = buffer[i];
+
+			if (c < 30)
+				*line++ = '.';
+			else
+				*line++ = c;
+		} else
+			break;
+	}
+
+	*line = '\0';
+}
+
+
+void 
+DataView::Draw(BRect updateRect)
+{
+	if (fData == NULL)
+		return;
+
+	// ToDo: take "updateRect" into account!
+
+	char line[255];
+	BPoint location(8, fFontHeight);
+
+	for (uint32 i = 0; i < fDataSize; i += kBlockSize) {
+		ConvertLine(line, fOffset + i, fData + i, fDataSize - i);
+		DrawString(line, location);
+
+		location.y += fFontHeight;
+	}
+	// ToDo: clear unused space!
+}
+

src/apps/diskprobe/DataView.h

@@ -0,0 +1,39 @@
+/* 
+** Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef DATA_VIEW_H
+#define DATA_VIEW_H
+
+
+#include <View.h>
+#include <String.h>
+#include <Path.h>
+
+
+class DataEditor;
+
+
+class DataView : public BView {
+	public:
+		DataView(BRect rect, DataEditor &editor);
+		virtual ~DataView();
+
+		virtual void DetachedFromWindow();
+		virtual void AttachedToWindow();
+		virtual void MessageReceived(BMessage *message);
+		virtual void Draw(BRect updateRect);
+
+	private:
+		void UpdateFromEditor(BMessage *message = NULL);
+		void ConvertLine(char *line, off_t offset, const uint8 *buffer, size_t size);
+
+		DataEditor	&fEditor;
+		int32		fPositionLength;
+		uint8		*fData;
+		uint32		fDataSize;
+		off_t		fOffset;
+		float		fFontHeight;
+};
+
+#endif	/* DATA_VIEW_H */

src/apps/diskprobe/Jamfile

@@ -7,6 +7,7 @@ AddResources DiskProbe : DiskProbe.rdef ;
 App DiskProbe :
 	DiskProbe.cpp
 	DataEditor.cpp
+	DataView.cpp
 	ProbeWindow.cpp
 	ProbeView.cpp
 	OpenWindow.cpp