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engines/ags/shared/gui/gui_slider.h

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+/* 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/>.
+ *
+ */
+
+#ifndef AGS_SHARED_GUI_GUI_SLIDER_H
+#define AGS_SHARED_GUI_GUI_SLIDER_H
+
+#include "common/std/vector.h"
+#include "ags/shared/gui/gui_object.h"
+
+namespace AGS3 {
+namespace AGS {
+namespace Shared {
+
+class GUISlider : public GUIObject {
+public:
+	GUISlider();
+
+	// Tells if the slider is horizontal (otherwise - vertical)
+	bool IsHorizontal() const;
+	bool IsOverControl(int x, int y, int leeway) const override;
+
+	// Compatibility: sliders are not clipped as of 3.6.0
+	bool IsContentClipped() const override { return false; }
+	bool HasAlphaChannel() const override;
+
+	// Operations
+	Rect CalcGraphicRect(bool clipped) override;
+	void Draw(Bitmap *ds, int x = 0, int y = 0) override;
+
+	// Events
+	bool OnMouseDown() override;
+	void OnMouseMove(int xp, int yp) override;
+	void OnMouseUp() override;
+
+	// Serialization
+	void ReadFromFile(Stream *in, GuiVersion gui_version) override;
+	void WriteToFile(Stream *out) const override;
+	void ReadFromSavegame(Stream *in, GuiSvgVersion svg_ver) override;
+	void WriteToSavegame(Stream *out) const override;
+
+	// TODO: these members are currently public; hide them later
+public:
+	int32_t MinValue;
+	int32_t MaxValue;
+	int32_t Value;
+	int32_t BgImage;
+	int32_t HandleImage;
+	int32_t HandleOffset;
+	bool    IsMousePressed;
+
+private:
+	// Updates dynamic metrics and positions of elements
+	void UpdateMetrics();
+
+	// Cached coordinates of slider bar; in relative coords
+	Rect    _cachedBar;
+	// Cached coordinates of slider handle; in relative coords
+	Rect    _cachedHandle;
+	// The length of the handle movement range, in pixels
+	int     _handleRange;
+};
+
+} // namespace Shared
+} // namespace AGS
+} // namespace AGS3
+
+#endif