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(svn r538) -Feature: Windows snap at each other

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This is inspired by [1063636].
This commit is contained in:
tron
2004-11-10 21:14:16 +00:00
parent 603618a75b
commit 872f49ae8a
6 changed files with 106 additions and 29 deletions
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128
window.c
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@@ -5,6 +5,9 @@
#include "viewport.h"
#include "console.h"
// delta between mouse cursor and upper left corner of dragged window
static Point _drag_delta;
void HandleButtonClick(Window *w, byte widget)
{
w->click_state |= (1 << widget);
@@ -691,50 +694,116 @@ bool HandlePopupMenu()
bool HandleWindowDragging()
{
Window *w;
int x, y, t;
// Get out immediately if no window is being dragged at all.
if (!_dragging_window)
return true;
// Otherwise find the window...
for(w=_windows; w != _last_window; w++) {
if (w->flags4&(WF_DRAGGING|WF_SIZING)) {
for (w = _windows; w != _last_window; w++) {
if (w->flags4 & WF_DRAGGING) {
const Window *v;
int x;
int y;
int nx;
int ny;
// Stop the dragging if the left mouse button was released
if (!_left_button_down) {
w->flags4 &= ~(WF_DRAGGING | WF_SIZING);
w->flags4 &= ~WF_DRAGGING;
break;
}
// Otherwise calculate the delta position.
x = _cursor.pos.x;
y = clamp2(_cursor.pos.y, 23, _screen.height-12);
t = _cursorpos_drag_start.x; _cursorpos_drag_start.x = x; x-=t;
t = _cursorpos_drag_start.y; _cursorpos_drag_start.y = y; y-=t;
// No movement?
if (x == 0 && y == 0)
return false;
// Mark the old position dirty
SetWindowDirty(w);
if (w->flags4 & WF_SIZING) {
// Size the window
w->width += x;
w->height += y;
} else {
// Move the window and viewport
w->left += x;
w->top += y;
if (w->viewport) {
w->viewport->left += x;
w->viewport->top += y;
x = _cursor.pos.x + _drag_delta.x;
y = _cursor.pos.y + _drag_delta.y;
nx = x;
ny = y;
if (_patches.window_snap_radius != 0) {
uint hsnap = _patches.window_snap_radius;
uint vsnap = _patches.window_snap_radius;
uint delta;
// Snap at screen borders
// Left screen border
delta = abs(x);
if (delta <= hsnap) {
nx = 0;
hsnap = delta;
}
// Right screen border
delta = abs(_screen.width - x - w->width);
if (delta <= hsnap) {
nx = _screen.width - w->width;
hsnap = delta;
}
// Top of screen
delta = abs(y);
if (delta <= vsnap) {
ny = 0;
vsnap = delta;
}
// Bottom of screen
delta = abs(_screen.height - y - w->height);
if (delta <= vsnap) {
ny = _screen.height - w->height;
vsnap = delta;
}
// Snap at other windows
for (v = _windows; v != _last_window; ++v) {
if (v == w) continue; // Don't snap at yourself
if (y + w->height > v->top && y < v->top + v->height) {
// Your left border <-> other right border
delta = abs(v->left + v->width - x);
if (delta <= hsnap) {
nx = v->left + v->width;
hsnap = delta;
}
// Your right border <-> other left border
delta = abs(v->left - x - w->width);
if (delta <= hsnap) {
nx = v->left - w->width;
hsnap = delta;
}
}
if (x + w->width > v->left && x < v->left + v->width) {
// Your top border <-> other bottom border
delta = abs(v->top + v->height - y);
if (delta <= vsnap) {
ny = v->top + v->height;
vsnap = delta;
}
// Your bottom border <-> other top border
delta = abs(v->top - y - w->height);
if (delta <= vsnap) {
ny = v->top - w->height;
vsnap = delta;
}
}
}
}
// And also mark the new position dirty.
// Make sure the window doesn't leave the screen
// 13 is the height of the title bar
nx = clamp(nx, 13 - w->width, _screen.width - 13);
ny = clamp(ny, 0, _screen.height - 13);
if (w->viewport != NULL) {
w->viewport->left += nx - w->left;
w->viewport->top += ny - w->top;
}
w->left = nx;
w->top = ny;
SetWindowDirty(w);
return false;
}
@@ -748,7 +817,8 @@ Window *StartWindowDrag(Window *w)
{
w->flags4 |= WF_DRAGGING;
_dragging_window = true;
_cursorpos_drag_start = _cursor.pos;
_drag_delta.x = w->left - _cursor.pos.x;
_drag_delta.y = w->top - _cursor.pos.y;
w = BringWindowToFront(w);
DeleteWindowById(WC_DROPDOWN_MENU, 0);
return w;