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/*
* Copyright (C) 2023 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2023 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-tk-lib
* Created on: 17 июл. 2020 г.
*
* lsp-tk-lib 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, either version 3 of the License, or
* any later version.
*
* lsp-tk-lib 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 lsp-tk-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_TK_WIDGETS_CONTAINERS_SCROLLAREA_H_
#define LSP_PLUG_IN_TK_WIDGETS_CONTAINERS_SCROLLAREA_H_
#ifndef LSP_PLUG_IN_TK_IMPL
#error "use <lsp-plug.in/tk/tk.h>"
#endif
namespace lsp
{
namespace tk
{
// Style definition
namespace style
{
LSP_TK_STYLE_DEF_BEGIN(ScrollArea, WidgetContainer)
prop::Layout sLayout;
prop::SizeConstraints sSizeConstraints;
prop::Scrolling sHScrollMode;
prop::Scrolling sVScrollMode;
prop::RangeFloat sHScroll;
prop::RangeFloat sVScroll;
LSP_TK_STYLE_DEF_END
}
/**
* Scrolling area widget, provides container that may scroll it's contents if it does not fit into
* the window
*/
class ScrollArea: public WidgetContainer
{
public:
static const w_class_t metadata;
protected:
typedef struct alloc_t
{
ws::size_limit_t sSize; // Overall widget size limits
ws::size_limit_t sWidget; // Size limits of the widget
ws::rectangle_t sArea; // Area allocated for the widget
ws::rectangle_t sHBar; // horizontal scroll parameters
ws::rectangle_t sVBar; // vertical scroll parameters
bool bHBar; // horizontal scroll enable
bool bVBar; // vertical scroll enable
ssize_t wMinW; // widget min width
ssize_t wMinH; // widget min height
} alloc_t;
protected:
Widget *pWidget;
ScrollBar sHBar;
ScrollBar sVBar;
ws::rectangle_t sArea;
prop::Layout sLayout;
prop::SizeConstraints sSizeConstraints;
prop::Scrolling sHScrollMode;
prop::Scrolling sVScrollMode;
prop::RangeFloat sHScroll;
prop::RangeFloat sVScroll;
protected:
void do_destroy();
void estimate_size(alloc_t *a, const ws::rectangle_t *xr);
static status_t slot_on_scroll_change(Widget *sender, void *ptr, void *data);
protected:
virtual void property_changed(Property *prop) override;
virtual void size_request(ws::size_limit_t *r) override;
virtual void realize(const ws::rectangle_t *r) override;
public:
explicit ScrollArea(Display *dpy);
ScrollArea(const ScrollArea &) = delete;
ScrollArea(ScrollArea &&) = delete;
virtual ~ScrollArea() override;
ScrollArea & operator = (const ScrollArea &) = delete;
ScrollArea & operator = (ScrollArea &&) = delete;
virtual status_t init() override;
virtual void destroy() override;
public:
inline void get_area(ws::rectangle_t *area) { *area = sArea; }
public:
LSP_TK_PROPERTY(Layout, layout, &sLayout)
LSP_TK_PROPERTY(SizeConstraints, constraints, &sSizeConstraints)
LSP_TK_PROPERTY(Scrolling, hscroll_mode, &sHScrollMode)
LSP_TK_PROPERTY(Scrolling, vscroll_mode, &sVScrollMode)
LSP_TK_PROPERTY(RangeFloat, hscroll, &sHScroll)
LSP_TK_PROPERTY(RangeFloat, vscroll, &sVScroll)
LSP_TK_PROPERTY(StepFloat, hstep, sHBar.step())
LSP_TK_PROPERTY(StepFloat, vstep, sVBar.step())
LSP_TK_PROPERTY(StepFloat, haccel_step, sHBar.accel_step())
LSP_TK_PROPERTY(StepFloat, vaccel_step, sVBar.accel_step())
public:
virtual void render(ws::ISurface *s, const ws::rectangle_t *area, bool force) override;
virtual status_t add(Widget *widget) override;
virtual status_t remove(Widget *widget) override;
virtual Widget *find_widget(ssize_t x, ssize_t y) override;
virtual status_t on_mouse_scroll(const ws::event_t *e) override;
};
} /* namespace tk */
} /* namespace lsp */
#endif /* LSP_PLUG_IN_TK_WIDGETS_CONTAINERS_SCROLLAREA_H_ */
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