PowerToys/src/modules/fancyzones/lib/ZoneWindow.h

#pragma once
#include "FancyZones.h"
#include "lib/ZoneSet.h"

namespace ZoneWindowUtils
{
    std::wstring GenerateUniqueId(HMONITOR monitor, PCWSTR deviceId, PCWSTR virtualDesktopId);
    std::wstring GenerateUniqueIdAllMonitorsArea(PCWSTR virtualDesktopId);
}

/**
 * Class representing single work area, which is defined by monitor and virtual desktop.
 */
interface __declspec(uuid("{7F017528-8110-4FB3-BE41-F472969C2560}")) IZoneWindow : public IUnknown
{
    /**
     * A window is being moved or resized. Track down window position and give zone layout
     * hints if dragging functionality is enabled.
     *
     * @param   window      Handle of window being moved or resized.
     */
    IFACEMETHOD(MoveSizeEnter)(HWND window) = 0;

    /**
     * A window has changed location, shape, or size. Track down window position and give zone layout
     * hints if dragging functionality is enabled.
     *
     * @param   ptScreen        Cursor coordinates.
     * @param   dragEnabled     Boolean indicating is giving hints about active zone layout enabled.
     *                          Hints are given while dragging window while holding SHIFT key.
     * @param   selectManyZones When this parameter is true, the set of highlighted zones is computed
                                by finding the minimum bounding rectangle of the zone(s) from which the
                                user started dragging and the zone(s) above which the user is hovering
                                at the moment this function is called. Otherwise, highlight only the zone(s)
                                above which the user is currently hovering.
     */
    IFACEMETHOD(MoveSizeUpdate)(POINT const& ptScreen, bool dragEnabled, bool selectManyZones) = 0;
    /**
     * The movement or resizing of a window has finished. Assign window to the zone of it
     * is dropped within zone borders.
     *
     * @param window   Handle of window being moved or resized.
     * @param ptScreen Cursor coordinates where window is dropped.
     */
    IFACEMETHOD(MoveSizeEnd)(HWND window, POINT const& ptScreen) = 0;
    /**
     * Assign window to the zone based on zone index inside zone layout.
     *
     * @param   window Handle of window which should be assigned to zone.
     * @param   index  Zone index within zone layout.
     */
    IFACEMETHOD_(void, MoveWindowIntoZoneByIndex)(HWND window, int index) = 0;
    /**
     * Assign window to the zones based on the set of zone indices inside zone layout.
     *
     * @param   window   Handle of window which should be assigned to zone.
     * @param   indexSet The set of zone indices within zone layout.
     */
    IFACEMETHOD_(void, MoveWindowIntoZoneByIndexSet)(HWND window, const std::vector<int>& indexSet) = 0;
    /**
     * Assign window to the zone based on direction (using WIN + LEFT/RIGHT arrow), based on zone index numbers,
     * not their on-screen position.
     *
     * @param   window Handle of window which should be assigned to zone.
     * @param   vkCode Pressed arrow key.
     * @param   cycle  Whether we should move window to the first zone if we reached last zone in layout.
     *
     * @returns Boolean which is always true if cycle argument is set, otherwise indicating if there is more
     *          zones left in the zone layout in which window can move.
     */
    IFACEMETHOD_(bool, MoveWindowIntoZoneByDirectionAndIndex)(HWND window, DWORD vkCode, bool cycle) = 0;
    /**
     * Assign window to the zone based on direction (using WIN + LEFT/RIGHT/UP/DOWN arrow), based on
     * their on-screen position.
     *
     * @param   window Handle of window which should be assigned to zone.
     * @param   vkCode Pressed arrow key.
     * @param   cycle  Whether we should move window to the first zone if we reached last zone in layout.
     *
     * @returns Boolean which is always true if cycle argument is set, otherwise indicating if there is more
     *          zones left in the zone layout in which window can move.
     */
    IFACEMETHOD_(bool, MoveWindowIntoZoneByDirectionAndPosition)(HWND window, DWORD vkCode, bool cycle) = 0;
    /**
     * Cycle through active zone layouts (giving hints about each layout).
     *
     * @param   vkCode Pressed key representing layout index.
     */
    IFACEMETHOD_(void, CycleActiveZoneSet)(DWORD vkCode) = 0;

    /**
     * Save information about zone in which window was assigned, when closing the window.
     * Used once we open same window again to assign it to its previous zone.
     *
     * @param   window Window handle.
     */
    IFACEMETHOD_(void, SaveWindowProcessToZoneIndex)(HWND window) = 0;
    /**
     * @returns Unique work area identifier. Format: <device-id>_<resolution>_<virtual-desktop-id>
     */
    IFACEMETHOD_(std::wstring, UniqueId)() = 0;
    /**
     * @returns Active zone layout for this work area.
     */
    IFACEMETHOD_(IZoneSet*, ActiveZoneSet)() = 0;
    IFACEMETHOD_(void, ShowZoneWindow)() = 0;
    IFACEMETHOD_(void, HideZoneWindow)() = 0;
    /**
     * Update currently active zone layout for this work area.
     */
    IFACEMETHOD_(void, UpdateActiveZoneSet)() = 0;
    /**
     * Clear the selected zones when this ZoneWindow loses focus.
     */
    IFACEMETHOD_(void, ClearSelectedZones)() = 0;
};

winrt::com_ptr<IZoneWindow> MakeZoneWindow(IZoneWindowHost* host, HINSTANCE hinstance, HMONITOR monitor,
    const std::wstring& uniqueId, const std::wstring& parentUniqueId, bool flashZones) noexcept;