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Mandelbrot: allow zooming in any direction

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Fixes #8679.
This commit is contained in:
Adrien Destugues 2014-11-07 17:33:50 +01:00
parent 3b218d2d82
commit 27fc6a70c6
1 changed files with 13 additions and 11 deletions
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24
src/apps/mandelbrot/tsb.cpp
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@ -12,6 +12,7 @@
#include <Debug.h>
#include <Window.h>
#include <algorithm>
#include <string.h>
#include <math.h>
#include <OS.h>
@ -517,7 +518,6 @@ char TShowBit::has_selection()
return 1;
}
/*------------------------------------------------------------*/
void TShowBit::change_selection(long h, long v)
{
@ -529,7 +529,7 @@ void TShowBit::change_selection(long h, long v)
BRect tmp_rect;
long max;
long width, height;
clip(&h, &v);
new_select.top = v;
new_select.left = h;
@ -544,19 +544,21 @@ void TShowBit::change_selection(long h, long v)
v0 = (long) where.y;
width = h0 - h;
height = v0 - v;
max= ((v0>v) ^ (height < width)) ? height : width;
h0 = h+max; v0 = v+max;
max = std::max(std::abs(height), std::abs(width));
v0 = (v0 > v) ? (v + max) : (v - max);
h0 = (h0 > h) ? (h + max) : (h - max);
clip(&h0, &v0);
new_select.right = h0;
new_select.bottom = v0;
if ((old_select.top != new_select.top) ||
(old_select.bottom != new_select.bottom) ||
(old_select.right != new_select.right) ||
(old_select.left != new_select.left)) {
if ((old_select.top != new_select.top)
|| (old_select.bottom != new_select.bottom)
|| (old_select.right != new_select.right)
|| (old_select.left != new_select.left)) {
tmp_rect = sort_rect(&new_select);
StrokeRect(tmp_rect);
@ -568,12 +570,12 @@ void TShowBit::change_selection(long h, long v)
}
snooze(20000);
} while(buttons);
} while (buttons);
selection = sort_rect(&new_select);
if (!has_selection()) {
StrokeRect(selection);
selection.Set(-1000, -1000, -1000, -1000);
}
}
SetDrawingMode(B_OP_COPY);
}