Implemented the selection code.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6571 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
@@ -8,26 +8,35 @@
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#include "DataEditor.h"
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#include <Messenger.h>
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#include <Looper.h>
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static const uint32 kBlockSize = 16;
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static const uint32 kHorizontalSpace = 8;
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static const uint32 kVerticalSpace = 4;
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static const uint32 kBlockSpace = 3;
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static const uint32 kHexByteWidth = 3;
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// these are determined by the implementation of DataView::ConvertLine()
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DataView::DataView(BRect rect, DataEditor &editor)
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: BView(rect, "dataView", B_FOLLOW_ALL, B_WILL_DRAW | B_NAVIGABLE | B_FRAME_EVENTS),
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fEditor(editor)
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fEditor(editor),
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fFocus(kHexFocus),
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fIsActive(true)
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{
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fPositionLength = 4;
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fStart = fEnd = 0;
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fMouseSelectionStart = -1;
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fDataSize = fEditor.ViewSize();
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fData = (uint8 *)malloc(fDataSize);
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SetFontSize(12.0);
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// also sets the fixed font
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UpdateFromEditor();
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SetFont(be_fixed_font);
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}
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@@ -141,10 +150,385 @@ DataView::Draw(BRect updateRect)
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location.y += fFontHeight;
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}
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// ToDo: clear unused space!
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DrawSelection();
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}
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int32
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DataView::PositionAt(view_focus focus, BPoint point, view_focus *_newFocus)
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{
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float left = fCharWidth * (fPositionLength + kBlockSpace) + kHorizontalSpace;
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float hexWidth = fCharWidth * kBlockSize * kHexByteWidth;
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float width = fCharWidth;
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if (focus == kNoFocus) {
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// find in which part the point is in
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if (point.x < left - width / 2)
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return -1;
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if (point.x > left + hexWidth)
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focus = kAsciiFocus;
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else
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focus = kHexFocus;
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if (_newFocus)
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*_newFocus = focus;
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}
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if (focus == kHexFocus) {
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left -= width / 2;
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width *= kHexByteWidth;
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} else
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left += hexWidth + (kBlockSpace * width);
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int32 row = int32((point.y - kVerticalSpace) / fFontHeight);
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int32 column = int32((point.x - left) / width);
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if (column >= (int32)kBlockSize)
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column = (int32)kBlockSize -1;
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else if (column < 0)
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column = 0;
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return row * kBlockSize + column;
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}
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BRect
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DataView::SelectionFrame(view_focus which, int32 start, int32 end)
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{
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float spacing = 0;
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float width = fCharWidth;
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float byteWidth = fCharWidth;
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float left;
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if (which == kHexFocus) {
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spacing = fCharWidth / 2;
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left = width * (fPositionLength + kBlockSpace);
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width *= kHexByteWidth;
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byteWidth *= 2;
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} else
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left = width * (fPositionLength + 2 * kBlockSpace + kHexByteWidth * kBlockSize);
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left += kHorizontalSpace;
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float startInLine = (start % kBlockSize) * width;
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float endInLine = (end % kBlockSize) * width + byteWidth - 1;
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return BRect(left + startInLine - spacing,
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kVerticalSpace + (start / kBlockSize) * fFontHeight,
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left + endInLine + spacing,
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kVerticalSpace + (end / kBlockSize + 1) * fFontHeight - 1);
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}
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void
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DataView::DrawSelectionFrame(view_focus which)
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{
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bool drawBlock = false;
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bool drawLastLine = false;
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BRect block, lastLine;
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int32 spacing = 0;
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if (which == kAsciiFocus)
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spacing++;
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// draw first line
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int32 start = fStart % kBlockSize;
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int32 first = (fStart / kBlockSize) * kBlockSize;
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int32 end = fEnd;
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if (end > first + (int32)kBlockSize - 1)
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end = first + kBlockSize - 1;
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BRect firstLine = SelectionFrame(which, first + start, end);
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firstLine.right += spacing;
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first += kBlockSize;
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// draw block (and last line) if necessary
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end = fEnd % kBlockSize;
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int32 last = (fEnd / kBlockSize) * kBlockSize;
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if (last >= first) {
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if (end == kBlockSize - 1)
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last += kBlockSize;
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if (last > first) {
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block = SelectionFrame(which, first, last - 1);
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block.right += spacing;
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drawBlock = true;
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}
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if (end != kBlockSize - 1) {
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lastLine = SelectionFrame(which, last, last + end);
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lastLine.right += spacing;
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drawLastLine = true;
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}
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}
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SetDrawingMode(B_OP_INVERT);
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BeginLineArray(8);
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// +*******
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// | *
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// +------+
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const rgb_color color = {0, 0, 0};
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float bottom;
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if (drawBlock)
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bottom = block.bottom;
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else
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bottom = firstLine.bottom;
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AddLine(BPoint(firstLine.left + 1, firstLine.top), firstLine.RightTop(), color);
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AddLine(BPoint(firstLine.right, firstLine.top + 1), BPoint(firstLine.right, bottom), color);
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// *-------+
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// * |
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// *********
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BRect rect;
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if (start == 0 || !drawBlock && !drawLastLine)
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rect = firstLine;
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else if (drawBlock)
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rect = block;
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else
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rect = lastLine;
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if (drawBlock)
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rect.bottom = block.bottom;
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if (drawLastLine) {
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rect.bottom = lastLine.bottom;
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rect.right = lastLine.right;
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}
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rect.bottom++;
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AddLine(rect.LeftTop(), rect.LeftBottom(), color);
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AddLine(BPoint(rect.left + 1, rect.bottom), rect.RightBottom(), color);
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// *--------+
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// * |
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// +**** |
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// | |
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if (start && (drawLastLine || drawBlock)) {
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AddLine(firstLine.LeftTop(), firstLine.LeftBottom(), color);
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float right = firstLine.left;
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if (!drawBlock && right > lastLine.right)
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right = lastLine.right;
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AddLine(BPoint(rect.left + 1, rect.top), BPoint(right, rect.top), color);
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}
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// | |
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// | *****
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// | *
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// +--------+
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if (drawLastLine) {
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AddLine(lastLine.RightBottom(), BPoint(lastLine.right, lastLine.top + 1), color);
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if (!drawBlock && lastLine.right <= firstLine.left)
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lastLine.right = firstLine.left + (lastLine.right < firstLine.left ? 0 : 1);
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AddLine(BPoint(lastLine.right, lastLine.top), BPoint(firstLine.right, lastLine.top), color);
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}
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EndLineArray();
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SetDrawingMode(B_OP_COPY);
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}
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void
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DataView::DrawSelectionBlock(view_focus which)
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{
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// draw first line
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SetDrawingMode(B_OP_INVERT);
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int32 start = fStart % kBlockSize;
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int32 first = (fStart / kBlockSize) * kBlockSize;
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int32 end = fEnd;
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if (end > first + (int32)kBlockSize - 1)
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end = first + kBlockSize - 1;
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FillRect(SelectionFrame(which, first + start, end));
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first += kBlockSize;
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// draw block (and last line) if necessary
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end = fEnd % kBlockSize;
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int32 last = (fEnd / kBlockSize) * kBlockSize;
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if (last >= first) {
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if (end == kBlockSize - 1)
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last += kBlockSize;
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if (last > first)
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FillRect(SelectionFrame(which, first, last - 1));
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if (end != kBlockSize - 1)
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FillRect(SelectionFrame(which, last, last + end));
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}
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SetDrawingMode(B_OP_COPY);
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}
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void
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DataView::DrawSelection()
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{
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if (fIsActive) {
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DrawSelectionBlock(fFocus);
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DrawSelectionFrame(fFocus == kHexFocus ? kAsciiFocus : kHexFocus);
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} else {
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DrawSelectionFrame(kHexFocus);
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DrawSelectionFrame(kAsciiFocus);
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}
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}
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void
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DataView::SetSelection(int32 start, int32 end, view_focus focus)
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{
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if (start > end) {
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int32 temp = start;
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start = end;
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end = temp;
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}
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if (start < 0)
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start = 0;
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if (end > (int32)fDataSize - 1)
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end = (int32)fDataSize - 1;
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if (fStart == start && fEnd == end) {
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// nothing has changed, no need to update
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return;
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}
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// remove old selection
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// ToDo: this could be drastically improved if only the changed
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// parts are drawn! Of course, this would only work for the
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// selection block, not the frame.
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DrawSelection();
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if (focus != kNoFocus)
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fFocus = focus;
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fStart = start;
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fEnd = end;
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DrawSelection();
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}
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void
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DataView::GetSelection(int32 &start, int32 &end)
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{
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start = fStart;
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end = fEnd;
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}
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void
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DataView::InvalidateRange(int32 start, int32 end)
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{
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int32 startLine = start / kBlockSize;
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int32 endLine = end / kBlockSize;
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if (endLine > startLine) {
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start = startLine * kBlockSize;
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end = (endLine + 1) * kBlockSize - 1;
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}
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// the part with focus
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BRect rect = SelectionFrame(fFocus, start, end);
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rect.bottom++;
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rect.right++;
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Invalidate(rect);
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// the part without focus
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rect = SelectionFrame(fFocus == kHexFocus ? kAsciiFocus : kHexFocus, start, end);
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rect.bottom++;
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rect.right++;
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Invalidate(rect);
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}
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void
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DataView::SetFocus(view_focus which)
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{
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if (which == fFocus)
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return;
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DrawSelection();
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fFocus = which;
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DrawSelection();
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}
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void
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DataView::WindowActivated(bool active)
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{
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fIsActive = active;
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// only redraw the focussed part
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if (fIsActive) {
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DrawSelectionFrame(fFocus);
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DrawSelectionBlock(fFocus);
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} else {
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DrawSelectionBlock(fFocus);
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DrawSelectionFrame(fFocus);
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}
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}
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void
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DataView::MouseDown(BPoint where)
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{
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BMessage *message = Looper()->CurrentMessage();
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int32 buttons;
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if (message == NULL || message->FindInt32("buttons", &buttons) != B_OK
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|| (buttons & B_PRIMARY_MOUSE_BUTTON) == 0)
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return;
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int32 modifiers = message->FindInt32("modifiers");
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view_focus newFocus;
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fMouseSelectionStart = PositionAt(kNoFocus, where, &newFocus);
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if (fMouseSelectionStart == -1) {
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// "where" is outside the valid frame
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return;
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}
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int32 selectionEnd = fMouseSelectionStart;
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if (modifiers & B_SHIFT_KEY) {
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// enlarge the current selection
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if (fStart < selectionEnd)
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fMouseSelectionStart = fStart;
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else if (fEnd > selectionEnd)
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fMouseSelectionStart = fEnd;
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}
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SetSelection(fMouseSelectionStart, selectionEnd, newFocus);
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SetMouseEventMask(B_POINTER_EVENTS,
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B_NO_POINTER_HISTORY | B_SUSPEND_VIEW_FOCUS | B_LOCK_WINDOW_FOCUS);
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}
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void
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DataView::MouseMoved(BPoint where, uint32 transit, const BMessage */*dragMessage*/)
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{
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if (fMouseSelectionStart == -1)
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return;
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SetSelection(fMouseSelectionStart, PositionAt(fFocus, where));
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}
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void
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DataView::MouseUp(BPoint where)
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{
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fMouseSelectionStart = -1;
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}
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void
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DataView::SetFont(const BFont *font, uint32 properties)
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{
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if (!font->IsFixed())
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@@ -157,6 +541,7 @@ DataView::SetFont(const BFont *font, uint32 properties)
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fFontHeight = int32(fontHeight.ascent + fontHeight.descent + fontHeight.leading);
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fAscent = fontHeight.ascent;
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fCharWidth = font->StringWidth("w");
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}
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@@ -176,7 +561,7 @@ DataView::GetPreferredSize(float *_width, float *_height)
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if (_width) {
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BFont font;
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GetFont(&font);
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*_width = font.StringWidth("w") * (kBlockSize * 4 + fPositionLength + 6)
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*_width = fCharWidth * (kBlockSize * 4 + fPositionLength + 6)
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+ 2 * kHorizontalSpace;
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}
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@@ -13,6 +13,11 @@
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class DataEditor;
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enum view_focus {
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kNoFocus,
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kHexFocus,
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kAsciiFocus
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};
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class DataView : public BView {
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public:
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@@ -24,22 +29,44 @@ class DataView : public BView {
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virtual void MessageReceived(BMessage *message);
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virtual void Draw(BRect updateRect);
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virtual void MouseDown(BPoint where);
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virtual void MouseMoved(BPoint where, uint32 transit, const BMessage *message);
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virtual void MouseUp(BPoint where);
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virtual void WindowActivated(bool active);
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virtual void SetFont(const BFont *font, uint32 properties = B_FONT_ALL);
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virtual void GetPreferredSize(float *_width, float *_height);
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void SetFontSize(float point);
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void SetSelection(int32 start, int32 end, view_focus focus = kNoFocus);
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void GetSelection(int32 &start, int32 &end);
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void InvalidateRange(int32 start, int32 end);
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private:
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BRect SelectionFrame(view_focus which, int32 start, int32 end);
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int32 PositionAt(view_focus focus, BPoint point, view_focus *_newFocus = NULL);
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void DrawSelectionFrame(view_focus which);
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void DrawSelectionBlock(view_focus which);
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void DrawSelection();
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void SetFocus(view_focus which);
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void UpdateFromEditor(BMessage *message = NULL);
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void ConvertLine(char *line, off_t offset, const uint8 *buffer, size_t size);
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DataEditor &fEditor;
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int32 fPositionLength;
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uint8 *fData;
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uint32 fDataSize;
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size_t fDataSize;
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off_t fOffset;
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float fAscent;
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int32 fFontHeight;
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float fCharWidth;
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view_focus fFocus;
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bool fIsActive;
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int32 fStart, fEnd;
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int32 fMouseSelectionStart;
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};
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#endif /* DATA_VIEW_H */
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