summaryrefslogtreecommitdiff
path: root/indra/llui/lldraghandle.cpp
blob: b7f67f8556ab5a4fe95b6a169e6fba0f7280df2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
/** 
 * @file lldraghandle.cpp
 * @brief LLDragHandle base class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

// A widget for dragging a view around the screen using the mouse.

#include "linden_common.h"

#include "lldraghandle.h"

#include "llmath.h"

//#include "llviewerwindow.h"
#include "llui.h"
#include "llmenugl.h"
#include "lltextbox.h"
#include "llcontrol.h"
#include "llfontgl.h"
#include "llwindow.h"
#include "llfocusmgr.h"
#include "lluictrlfactory.h"

const S32 LEADING_PAD = 5;
const S32 TITLE_HPAD = 8;
const S32 BORDER_PAD = 1;
const S32 LEFT_PAD = BORDER_PAD + TITLE_HPAD + LEADING_PAD;
const S32 RIGHT_PAD = BORDER_PAD + 32; // HACK: space for close btn and minimize btn

S32 LLDragHandle::sSnapMargin = 5;

LLDragHandle::LLDragHandle(const LLDragHandle::Params& p)
:	LLView(p),
	mDragLastScreenX( 0 ),
	mDragLastScreenY( 0 ),
	mLastMouseScreenX( 0 ),
	mLastMouseScreenY( 0 ),
	mTitleBox( NULL ),
	mMaxTitleWidth( 0 ),
	mForeground( TRUE ),
	mDragHighlightColor(p.drag_highlight_color()),
	mDragShadowColor(p.drag_shadow_color())

{
	static LLUICachedControl<S32> snap_margin ("SnapMargin", 0);
	sSnapMargin = snap_margin;
}

LLDragHandle::~LLDragHandle()
{
	removeChild(mTitleBox);
	delete mTitleBox;
}

void LLDragHandle::initFromParams(const LLDragHandle::Params& p)
{
	LLView::initFromParams(p);
	setTitle( p.label );
}

void LLDragHandle::setTitleVisible(BOOL visible) 
{ 
	if(mTitleBox)
	{
		mTitleBox->setVisible(visible); 
	}
}

void LLDragHandleTop::setTitle(const std::string& title)
{
	std::string trimmed_title = title;
	LLStringUtil::trim(trimmed_title);

	if( mTitleBox )
	{
		mTitleBox->setText(trimmed_title);
	}
	else
	{
		const LLFontGL* font = LLFontGL::getFontSansSerif();
		LLTextBox::Params params;
		params.name("Drag Handle Title");
		params.rect(getRect());
		params.initial_value(trimmed_title);
		params.font(font);
		params.follows.flags(FOLLOWS_TOP | FOLLOWS_LEFT | FOLLOWS_RIGHT);
		params.font_shadow(LLFontGL::DROP_SHADOW_SOFT);
		params.use_ellipses = true;
		params.parse_urls = false; //cancel URL replacement in floater title
		mTitleBox = LLUICtrlFactory::create<LLTextBox> (params);
		addChild( mTitleBox );
	}
	
	reshapeTitleBox();
}


std::string LLDragHandleTop::getTitle() const
{
	return mTitleBox == NULL ? LLStringUtil::null : mTitleBox->getText();
}


void LLDragHandleLeft::setTitle(const std::string& )
{
	if( mTitleBox )
	{
		removeChild(mTitleBox);
		delete mTitleBox;
		mTitleBox = NULL;
	}
	/* no title on left edge */
}


std::string LLDragHandleLeft::getTitle() const
{
	return LLStringUtil::null;
}


void LLDragHandleTop::draw()
{
	/* Disable lines.  Can drag anywhere in most windows.  JC
	if( getVisible() && getEnabled() && mForeground) 
	{
		const S32 BORDER_PAD = 2;
		const S32 HPAD = 2;
		const S32 VPAD = 2;
		S32 left = BORDER_PAD + HPAD;
		S32 top = getRect().getHeight() - 2 * VPAD;
		S32 right = getRect().getWidth() - HPAD;
//		S32 bottom = VPAD;

		// draw lines for drag areas

		const S32 LINE_SPACING = (DRAG_HANDLE_HEIGHT - 2 * VPAD) / 4;
		S32 line = top - LINE_SPACING;

		LLRect title_rect = mTitleBox->getRect();
		S32 title_right = title_rect.mLeft + mTitleWidth;
		BOOL show_right_side = title_right < getRect().getWidth();

		for( S32 i=0; i<4; i++ )
		{
			gl_line_2d(left, line+1, title_rect.mLeft - LEADING_PAD, line+1, mDragHighlightColor);
			if( show_right_side )
			{
				gl_line_2d(title_right, line+1, right, line+1, mDragHighlightColor);
			}

			gl_line_2d(left, line, title_rect.mLeft - LEADING_PAD, line, mDragShadowColor);
			if( show_right_side )
			{
				gl_line_2d(title_right, line, right, line, mDragShadowColor);
			}
			line -= LINE_SPACING;
		}
	}
	*/

	// Colorize the text to match the frontmost state
	if (mTitleBox)
	{
		mTitleBox->setEnabled(getForeground());
	}

	LLView::draw();
}


// assumes GL state is set for 2D
void LLDragHandleLeft::draw()
{
	/* Disable lines.  Can drag anywhere in most windows. JC
	if( getVisible() && getEnabled() && mForeground ) 
	{
		const S32 BORDER_PAD = 2;
//		const S32 HPAD = 2;
		const S32 VPAD = 2;
		const S32 LINE_SPACING = 3;

		S32 left = BORDER_PAD + LINE_SPACING;
		S32 top = getRect().getHeight() - 2 * VPAD;
//		S32 right = getRect().getWidth() - HPAD;
		S32 bottom = VPAD;
 
		// draw lines for drag areas

		// no titles yet
		//LLRect title_rect = mTitleBox->getRect();
		//S32 title_right = title_rect.mLeft + mTitleWidth;
		//BOOL show_right_side = title_right < getRect().getWidth();

		S32 line = left;
		for( S32 i=0; i<4; i++ )
		{
			gl_line_2d(line, top, line, bottom, mDragHighlightColor);

			gl_line_2d(line+1, top, line+1, bottom, mDragShadowColor);

			line += LINE_SPACING;
		}
	}
	*/

	// Colorize the text to match the frontmost state
	if (mTitleBox)
	{
		mTitleBox->setEnabled(getForeground());
	}

	LLView::draw();
}

void LLDragHandleTop::reshapeTitleBox()
{
	static LLUICachedControl<S32> title_vpad("UIFloaterTitleVPad", 0);
	if( ! mTitleBox)
	{
		return;
	}
	const LLFontGL* font = LLFontGL::getFontSansSerif();
	S32 title_width = getRect().getWidth();
	title_width -= LEFT_PAD + 2 * BORDER_PAD + getButtonsRect().getWidth();
	S32 title_height = font->getLineHeight();
	LLRect title_rect;
	title_rect.setLeftTopAndSize( 
		LEFT_PAD, 
		getRect().getHeight() - title_vpad,
		title_width,
		title_height);

	// calls reshape on mTitleBox
	mTitleBox->setShape( title_rect );
}

void LLDragHandleTop::reshape(S32 width, S32 height, BOOL called_from_parent)
{
	LLView::reshape(width, height, called_from_parent);
	reshapeTitleBox();
}

void LLDragHandleLeft::reshape(S32 width, S32 height, BOOL called_from_parent)
{
	LLView::reshape(width, height, called_from_parent);
}

//-------------------------------------------------------------
// UI event handling
//-------------------------------------------------------------

BOOL LLDragHandle::handleMouseDown(S32 x, S32 y, MASK mask)
{
	// Route future Mouse messages here preemptively.  (Release on mouse up.)
	// No handler needed for focus lost since this clas has no state that depends on it.
	gFocusMgr.setMouseCapture(this);

	localPointToScreen(x, y, &mDragLastScreenX, &mDragLastScreenY);
	mLastMouseScreenX = mDragLastScreenX;
	mLastMouseScreenY = mDragLastScreenY;

	// Note: don't pass on to children
	return TRUE;
}


BOOL LLDragHandle::handleMouseUp(S32 x, S32 y, MASK mask)
{
	if( hasMouseCapture() )
	{
		// Release the mouse
		gFocusMgr.setMouseCapture( NULL );
	}

	// Note: don't pass on to children
	return TRUE;
}


BOOL LLDragHandle::handleHover(S32 x, S32 y, MASK mask)
{
	BOOL	handled = FALSE;

	// We only handle the click if the click both started and ended within us
	if( hasMouseCapture() )
	{
		S32 screen_x;
		S32 screen_y;
		localPointToScreen(x, y, &screen_x, &screen_y);

		// Resize the parent
		S32 delta_x = screen_x - mDragLastScreenX;
		S32 delta_y = screen_y - mDragLastScreenY;

		// if dragging a docked floater we want to undock
		if (((LLFloater*)getParent())->isDocked())
		{
			const S32 SLOP = 12;

			if (delta_y <= -SLOP || 
				delta_y >= SLOP)
			{
				((LLFloater*)getParent())->setDocked(false, false);
				return TRUE;
			}
			else
			{
				return FALSE;
			}
		}

		LLRect original_rect = getParent()->getRect();
		LLRect translated_rect = getParent()->getRect();
		translated_rect.translate(delta_x, delta_y);
		// temporarily slam dragged window to new position
		getParent()->setRect(translated_rect);
		S32 pre_snap_x = getParent()->getRect().mLeft;
		S32 pre_snap_y = getParent()->getRect().mBottom;
		mDragLastScreenX = screen_x;
		mDragLastScreenY = screen_y;

		LLRect new_rect;
		LLCoordGL mouse_dir;
		// use hysteresis on mouse motion to preserve user intent when mouse stops moving
		mouse_dir.mX = (screen_x == mLastMouseScreenX) ? mLastMouseDir.mX : screen_x - mLastMouseScreenX;
		mouse_dir.mY = (screen_y == mLastMouseScreenY) ? mLastMouseDir.mY : screen_y - mLastMouseScreenY;
		mLastMouseDir = mouse_dir;
		mLastMouseScreenX = screen_x;
		mLastMouseScreenY = screen_y;

		LLView* snap_view = getParent()->findSnapRect(new_rect, mouse_dir, SNAP_PARENT_AND_SIBLINGS, sSnapMargin);

		getParent()->setSnappedTo(snap_view);
		delta_x = new_rect.mLeft - pre_snap_x;
		delta_y = new_rect.mBottom - pre_snap_y;
		translated_rect.translate(delta_x, delta_y);

		// restore original rect so delta are detected, then call user reshape method to handle snapped floaters, etc
		getParent()->setRect(original_rect);
		getParent()->setShape(translated_rect, true);

		mDragLastScreenX += delta_x;
		mDragLastScreenY += delta_y;

		getWindow()->setCursor(UI_CURSOR_ARROW);
		LL_DEBUGS("UserInput") << "hover handled by " << getName() << " (active)" <<LL_ENDL;		
		handled = TRUE;
	}
	else
	{
		getWindow()->setCursor(UI_CURSOR_ARROW);
		LL_DEBUGS("UserInput") << "hover handled by " << getName() << " (inactive)" << LL_ENDL;		
		handled = TRUE;
	}

	// Note: don't pass on to children

	return handled;
}

void LLDragHandle::setValue(const LLSD& value)
{
	setTitle(value.asString());
}