Initial commit

engines/bladerunner/ui/ui_slider.cpp

@@ -0,0 +1,173 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "bladerunner/ui/ui_slider.h"
+
+#include "bladerunner/audio_player.h"
+#include "bladerunner/bladerunner.h"
+#include "bladerunner/game_info.h"
+#include "bladerunner/game_constants.h"
+
+namespace BladeRunner {
+
+const Color256 UISlider::kColors[] = {
+	{   0,   0,   0 }, // Black - unpressed (framing rectange)
+	{  16,   8,   8 },
+	{  32,  24,   8 },
+	{  56,  32,  16 },
+	{  72,  48,  16 },
+	{  88,  56,  24 }, // Mouse-over (framing rectange)
+	{ 104,  72,  32 },
+	{ 128,  80,  40 },
+	{ 136,  96,  48 },
+	{ 152, 112,  56 },
+	{ 168, 128,  72 }, // Pressed (framing rectange)
+	{ 184, 144,  88 },
+	{ 200, 160,  96 },
+	{ 216, 184, 112 },
+	{ 232, 200, 128 },
+	{ 240, 224, 144 }
+};
+
+UISlider::UISlider(BladeRunnerEngine *vm, UIComponentCallback *valueChangedCallback, void *callbackData, Common::Rect rect, int maxValue, int value)
+	: UIComponent(vm) {
+
+	_valueChangedCallback = valueChangedCallback;
+	_callbackData = callbackData;
+
+	_maxValue = MAX(0, maxValue);
+	_value = CLIP(value, 0, _maxValue - 1);
+
+	_rect = rect;
+	_isEnabled = true;
+	_currentFrameColor = 0;
+	_hasFocus = false;
+	_pressedStatus = 0;
+	_mouseX = 0;
+}
+
+void UISlider::draw(Graphics::Surface &surface) {
+	if (_rect.isEmpty()) {
+		return;
+	}
+
+	int frameColor;
+	if (_pressedStatus == 1) {
+		frameColor = 10;
+	} else if (_hasFocus && _pressedStatus != 2 && _isEnabled) {
+		frameColor = 5;
+	} else {
+		frameColor = 0;
+	}
+
+	// Ensures animated transition of the frame's (outlining rectangle's) color to the new one
+	if (_currentFrameColor < frameColor) {
+		++_currentFrameColor;
+	}
+
+	// Ensures animated transition of the frame's (outlining rectangle's) color to the new one
+	if (_currentFrameColor > frameColor) {
+		--_currentFrameColor;
+	}
+
+	surface.frameRect(_rect, surface.format.RGBToColor(kColors[_currentFrameColor].r, kColors[_currentFrameColor].g, kColors[_currentFrameColor].b));
+
+	int sliderX = 0;
+	if (_maxValue <= 1) {
+		sliderX = _rect.left;
+	} else {
+		sliderX = _rect.left + ((_value * _rect.width()) / (_maxValue - 1));
+	}
+
+	if (_pressedStatus == 1) {
+		int sliderValue = ((_maxValue - 1) * (_mouseX - _rect.left)) / _rect.width();
+		sliderX = _rect.left + ((sliderValue * _rect.width()) / (_maxValue - 1));
+		sliderX = CLIP(sliderX, (int)_rect.left, (int)_rect.right);
+	}
+
+	if (_rect.left + 1 < _rect.right - 1) {
+		int striding = _rect.left + sliderX;
+		for (int x = _rect.left + 1; x < _rect.right - 1; ++x) {
+			int colorIndex =  15 - (abs(sliderX - x) >> 2);
+
+			if (!_isEnabled) {
+				colorIndex /= 2;
+			}
+
+			if (colorIndex < 3) {
+				colorIndex = 3;
+			}
+
+			uint32 color = surface.format.RGBToColor(kColors[colorIndex].r, kColors[colorIndex].g, kColors[colorIndex].b);
+			if ((striding + x) & 1 || x == sliderX) {
+				color = surface.format.RGBToColor(0, 0, 0);
+			}
+
+			surface.vLine(x, _rect.top + 1, _rect.bottom - 2, color);
+		}
+	}
+}
+
+void UISlider::handleMouseMove(int mouseX, int mouseY) {
+	_mouseX = mouseX;
+	if (_rect.contains(mouseX, mouseY)) {
+		if (!_hasFocus && _isEnabled && _pressedStatus == 0) {
+			_vm->_audioPlayer->playAud(_vm->_gameInfo->getSfxTrack(kSfxTEXT3), 100, 0, 0, 50, 0);
+		}
+		_hasFocus = true;
+	} else {
+		_hasFocus = false;
+	}
+}
+
+void UISlider::handleMouseDown(bool alternateButton) {
+	if (_isEnabled && !alternateButton) {
+		if (_hasFocus) {
+			_pressedStatus = 1;
+		} else {
+			_pressedStatus = 2;
+		}
+	}
+}
+
+void UISlider::handleMouseUp(bool alternateButton) {
+	if (!alternateButton) {
+		if (_pressedStatus == 1) {
+			if (_rect.width() == 0) {
+				_value = 0;
+			} else {
+				_value = ((_maxValue - 1) * (_mouseX - _rect.left)) / _rect.width();
+			}
+			_value = CLIP(_value, 0, _maxValue - 1);
+
+			if (_valueChangedCallback) {
+				_valueChangedCallback(_callbackData, this);
+			}
+		}
+		_pressedStatus = 0;
+	}
+}
+
+void UISlider::setValue(int value) {
+	_value = CLIP(value, 0, _maxValue - 1);
+}
+
+} // End of namespace BladeRunner