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DiskUsage: Implement truncation in tabs labels

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* To allow more devices to be shown and accessible within
  DiskUsage, truncate the columns names if necessary.

Might help but not quite fix #6800.
This commit is contained in:
Philippe Saint-Pierre 2011-11-13 22:20:25 -05:00
parent 2cdd33d4ff
commit a9e957e2de
1 changed files with 69 additions and 9 deletions
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76
src/apps/diskusage/ControlsView.cpp
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@ -16,7 +16,9 @@
#include <NodeMonitor.h>
#include <Path.h>
#include <PopUpMenu.h>
#include <String.h>
#include <SupportDefs.h>
#include <View.h>
#include <Volume.h>
#include <VolumeRoster.h>
#include <Window.h>
@ -77,12 +79,17 @@ VolumeTab::DrawLabel(BView* owner, BRect frame)
(frame.top + frame.bottom - fIcon->Bounds().Height()) / 2.0);
owner->DrawBitmap(fIcon);
}
owner->SetDrawingMode(B_OP_COPY);
font_height fh;
owner->GetFontHeight(&fh);
BString label = Label();
owner->TruncateString(&label, B_TRUNCATE_END,
frame.Width() - IconWidth() - kSmallHMargin);
owner->SetHighColor(ui_color(B_CONTROL_TEXT_COLOR));
owner->DrawString(Label(),
owner->DrawString(label,
BPoint(frame.left + IconWidth() + kSmallHMargin,
(frame.top + frame.bottom - fh.ascent - fh.descent) / 2.0
+ fh.ascent));
@ -138,15 +145,68 @@ ControlsView::VolumeTabView::TabFrame(int32 index) const
{
float height = BTabView::TabFrame(index).Height();
float x = 0.0f;
for (int32 i = 0; i < index; i++) {
x += StringWidth(TabAt(i)->Label()) + 3.0f * kSmallHMargin
float width = 0.0f;
float minStringWidth = StringWidth("Haiku");
int countTabs = CountTabs();
// calculate the total width if no truncation is made at all
float averageWidth = Frame().Width() / countTabs;
// margins are the deltas with the average widths
float* margins = new float[countTabs];
for (int32 i = 0; i < countTabs; i++) {
float tabLabelWidth = StringWidth(TabAt(i)->Label());
if (tabLabelWidth < minStringWidth)
tabLabelWidth = minStringWidth;
float tabWidth = tabLabelWidth + 3.0f * kSmallHMargin
+ ((VolumeTab*)TabAt(i))->IconWidth();
margins[i] = tabWidth - averageWidth;
width += tabWidth;
}
return BRect(x, 0.0f,
x + StringWidth(TabAt(index)->Label()) + 3.0f * kSmallHMargin
+ ((VolumeTab*)TabAt(index))->IconWidth(),
height);
// determine how much we should shave to show all tabs (truncating)
float toShave = width - Frame().Width();
if (toShave > 0.0f) {
// the thinest a tab can be to hold the minimum string
float minimumMargin = minStringWidth + 3.0f * kSmallHMargin
- averageWidth;
float averageToShave;
float oldToShave;
/*
we might have to do multiple passes because of the minimum
tab width we are imposing.
we could also fail to totally fit all tabs.
TODO: allow paging.
*/
do {
averageToShave = toShave / countTabs;
oldToShave = toShave;
for (int32 i = 0; i < countTabs; i++) {
float iconWidth = ((VolumeTab*)TabAt(i))->IconWidth();
float newMargin = margins[i] - averageToShave;
toShave -= averageToShave;
if (newMargin < minimumMargin + iconWidth) {
toShave += minimumMargin - newMargin + iconWidth;
newMargin = minimumMargin + iconWidth;
}
margins[i] = newMargin;
}
} while (toShave > 0 && oldToShave != toShave);
}
for (int i = 0; i < index; i++)
x += averageWidth + margins[i];
float margin = margins[index];
delete[] margins;
return BRect(x, 0.0f, x + averageWidth + margin, height);
}